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Da Rosa Zanatta, Mateus; Costa, João Paulo Carvalho Lustosa da; Antreich, Felix; Haardt, Martin; Elger, Gordon; Lopes De Mendon¸ca, Fábio Lúcio; De Sousa, Rafael Timóteo;
Tensor-based framework with model order selection and high accuracy factor decomposition for time-delay estimation in dynamic multipath scenarios. - In: IEEE access : practical research, open solutions.. - New York, NY : IEEE, ISSN 2169-3536, Bd. 8 (2020), S. 174931-174942

Global Navigation Satellite Systems (GNSS) are crucial for applications that demand very accurate positioning. Tensor-based time-delay estimation methods, such as CPD-GEVD, DoA/KRF, and SECSI, combined with the GPS3 L1C signal, are capable of, significantly, mitigating the positioning degradation caused by multipath components. However, even though these schemes require an estimated model order, they assume that the number of multipath components is constant. In GNSS applications, the number of multipath components is time-varying in dynamic scenarios. Thus, in this paper, we propose a tensor-based framework with model order selection and high accuracy factor decomposition for time-delay estimation in dynamic multipath scenarios. Our proposed approach exploits the estimates of the model order for each slice by grouping the data tensor slices into sub-tensors to provide high accuracy factor decomposition. We further enhance the proposed approach by incorporating the tensor-based Multiple Denoising (MuDe).



https://doi.org/10.1109/ACCESS.2020.3024597
Häfner, Stephan; Thomä, Reiner;
Compensation of motion-induced phase errors and enhancement of Doppler unambiguity in TDM-MIMO systems by model-based estimation. - In: IEEE sensors letters : ISLECD.. - New York, NY : IEEE, ISSN 2475-1472, Volume 4 (2020), issue 10, 7003504, 4 Seiten

Utilization of multiple input multiple output (MIMO) systems in radar and channel sounding has gained increased attention in recent years. Quite often, time-division multiplexing (TDM) is employed to realize orthogonal waveforms at the transmitter. Apart from its advantages, TDM has two severe drawbacks. First, motion-induced phase variations become indistinguishable from phase migration due to the signal's arrival direction. This is termed angle-Doppler coupling, which causes ambiguities in angle, and Doppler estimation. Second, the unambiguously resolvable Doppler, i.e., the Doppler bandwidth, is reduced. In this letter, a model-based estimation approach will be proposed, which compensates for angle-Doppler coupling, and restores the Doppler bandwidth. A data model for the MIMO observations is derived, which is exploited by a maximum likelihood estimator to infer angle, delay, and Doppler from the observations. The performance of the proposed approach will be testified by simulations.



https://doi.org/10.1109/LSENS.2020.3020700
E-Asim, Fazal-; Almeida, André L. F.; Haardt, Martin; Cavalcante, Charles C.; Nossek, Josef A.;
Rank-one detector for Kronecker-structured constant modulus constellations. - In: IEEE signal processing letters : a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, ISSN 1558-2361, Bd. 27 (2020), S. 1420-1424

To achieve a reliable communication with short data blocks, we propose a novel decoding strategy for Kronecker-structured constant modulus signals that provides low bit error ratios (BERs) especially in the low energy per bit to noise power spectral density ratio (E_b/N_o). The encoder exploits the fact that any M-PSK constellation can be factorized as Kronecker products of lower or equal order PSK constellation sets. A construction of two types of schemes is first derived. For such Kronecker-structured schemes, a conceptually simple decoding algorithm is proposed, referred to as Kronecker-RoD (rank-one detector). The decoder is based on a rank-one approximation of the "tensorized" received data block, has a built-in noise rejection capability and a smaller implementation complexity than state-of-the-art detectors. Compared with convolutional codes with hard and soft Viterbi decoding, Kronecker-RoD outperforms the latter in BER performance at same spectral efficiency.



https://doi.org/10.1109/LSP.2020.3010133
Mostafa, Mohamed H.; Chamaani, Somayyeh; Sachs, Jürgen;
Singular spectrum analysis-based algorithm for vitality monitoring using M-sequence UWB sensor. - In: IEEE sensors journal. - New York, NY : IEEE, ISSN 1558-1748, Bd. 20 (2020), 9, S. 4787-4802

https://doi.org/10.1109/JSEN.2019.2962721
Akbarpour, Alireza; Chamaani, Somayyeh; Sachs, Jürgen; Del Galdo, Giovanni;
Clutter removal of near-field UWB SAR imaging for pipeline penetrating radar. - In: IEEE journal of selected topics in applied earth observations and remote sensing. - New York, NY : IEEE, Bd. 13 (2020), S. 1527-1539

https://doi.org/10.1109/JSTARS.2020.2983891
Valle de Lima, Daniel; Da Rosa Zanatta, Mateus; Costa, João Paulo Carvalho Lustosa da; de Sousa Júnior, Rafael Timóteo; Haardt, Martin;
Robust tensor-based techniques for antenna array-based GNSS receivers in scenarios with highly correlated multipath components. - In: Digital signal processing : a review journal.. - Orlando, Fla. : Academic Press, ISSN 1051-2004, Bd. 101 (2020), 102715

https://doi.org/10.1016/j.dsp.2020.102715
Naskovska, Kristina; Lau, Stephan; Korobkov, Alexey A.; Haueisen, Jens; Haardt, Martin;
Coupled CP decomposition of simultaneous MEG-EEG signals for differentiating oscillators during photic driving. - In: Frontiers in neuroscience. - Lausanne : Frontiers Research Foundation, ISSN 1662-453X, Bd. 14 (2020), 261, S. 1-18

https://doi.org/10.3389/fnins.2020.00261
Weise, Konstantin; Poßner, Lucas; Müller, Erik; Gast, Richard; Knösche, Thomas R.;
Pygpc: a sensitivity and uncertainty analysis toolbox for Python. - In: SoftwareX. - Amsterdam [u.a.] : Elsevier, ISSN 2352-7110, Bd. 11 (2020), 100450, S. 1-6

https://doi.org/10.1016/j.softx.2020.100450
Brachvogel, Marius; Niestroj, Michael; Zorn, Sören; Meurer, Michael; Hasnain, Syed N.; Stephan, Ralf; Hein, Matthias;
A new array concept using spatially distributed subarrays for unambiguous GNSS interference mitigation in automotive applications. - In: Navigation : journal of the Institute of Navigation.. - Hoboken, NJ [u.a.] : Wiley-Blackwell, ISSN 2161-4296, Bd. 67 (2020), 1, S. 23-41

https://doi.org/10.1002/navi.353
Doß, Martin; Bungert, Leon; Cichon, Daniel; Brauer, Hartmut; Psiuk, Rafael;
Localization of passive 3-D coils as an inverse problem: theoretical analysis and a numerical method. - In: IEEE transactions on magnetics : a publication of the IEEE Magnetics Society.. - New York, NY : IEEE, ISSN 1941-0069, Bd. 56 (2020), 4, S. 7200410, insges. 10 S.

https://doi.org/10.1109/TMAG.2020.2968858
Häfner, Stephan; Dürr, André; Waldschmidt, Christian; Thomä, Reiner;
Mitigation of RF impairments of a 160-GHz MMIC FMCW radar using model-based estimation. - In: IEEE transactions on microwave theory and techniques : MTT ; a publication of the IEEE Microwave Theory and Techniques Society.. - New York, NY : IEEE, Bd. 68 (2020), 3, S. 1065-1073

https://doi.org/10.1109/TMTT.2019.2950204
Milanezi Junior, Jayme; Costa, João Paulo Carvalho Lustosa da; Garcez, Caio C. R.; Albuquerque, Robson de Oliveira; Arancibia Moreno, Arnaldo Mario; Weichenberger, Lothar; Lopes de Mendon¸ca, Fábio Lucio; Del Galdo, Giovanni; De Sousa Júnior, Rafael T.;
Data security and trading framework for smart grids in neighborhood area networks. - In: Sensors. - Basel : MDPI, ISSN 1424-8220, Volume 20 (2020), issue 5, 1337, Seite 1-25

https://doi.org/10.3390/s20051337
Ardah, Khaled; Fodor, Gábor; Silva, Yuri Carvalho Barbosa; Freitas, Walter C.; Almeida, André L.F.;
Hybrid analog-digital beamforming design for SE and EE maximization in massive MIMO networks. - In: IEEE transactions on vehicular technology : a publication of the IEEE Vehicular Technology Society.. - New York, NY : IEEE, ISSN 1939-9359, Bd. 69 (2020), 1, S. 377-389

https://doi.org/10.1109/TVT.2019.2933305
He, Ruisi; Ai, Bo; Wang, Gongpu; Zhong, Zhangdui; Schneider, Christian; Dupleich, Diego A.; Thomä, Reiner; Boban, Mate; Luo, Jian; Zhang, Yunyong;
Propagation channels of 5G millimeter-wave vehicle-to-vehicle communications: recent advances and future challenges. - In: IEEE Vehicular technology magazine. - New York, NY : IEEE, Bd. 15 (2020), 1, S. 16-26

https://doi.org/10.1109/MVT.2019.2928898
Beuster, Niklas; Ihlow, Alexander; Blau, Kurt; Trabert, Johannes F.; Andrich, Carsten; Bauer, Julia; Del Galdo, Giovanni;
UHF RFID tag response measurements using a do-it-yourself platform and components off-the-shelf. - In: IEEE journal of radio frequency identification. - New York, NY : IEEE, ISSN 2469-7281, Bd. 4 (2020), 1, S. 65-72

https://doi.org/10.1109/JRFID.2020.2965006
Ziolkowski, Marek; Otterbach, Jan Marc; Schmidt, Reinhard; Brauer, Hartmut; Töpfer, Hannes;
Numerical simulations of portable systems for motion-induced eddy-current testing. - In: IEEE transactions on magnetics : a publication of the IEEE Magnetics Society.. - New York, NY : IEEE, ISSN 1941-0069, Bd. 56 (2020), 1, S. 7502204, insges. 4 S.

https://doi.org/10.1109/TMAG.2019.2950462
Krey, Maximilian; Hähnlein, Bernd; Tonisch, Katja; Krischok, Stefan; Töpfer, Hannes;
Automated parameter extraction of ScAlN MEMS devices using an extended Euler-Bernoulli beam theory. - In: Sensors. - Basel : MDPI, ISSN 1424-8220, Volume 20 (2020), issue 4, 1001, Seite 1-19

https://doi.org/10.3390/s20041001
Weise, Konstantin; Numssen, Ole; Thielscher, Axel; Hartwigsen, Gesa; Knösche, Thomas R.;
A novel approach to localize cortical TMS effects. - In: NeuroImage : a journal of brain function.. - Orlando, Fla. : Academic Press, ISSN 1095-9572, Bd. 209 (2020), 116486, S. 1-17

https://doi.org/10.1016/j.neuroimage.2019.116486
Sokal, Bruno; Almeida, André L.F.; Haardt, Martin;
Semi-blind receivers for MIMO multi-relaying systems via rank-one tensor approximations. - In: Signal processing : a European journal devoted to the methods and applications of signal processing.. - Amsterdam [u.a.] : Elsevier, Volume 166 (2020), 107254, Seite 1-13

https://doi.org/10.1016/j.sigpro.2019.107254
Psiuk, Rafael; Müller, Alfred; Cichon, Daniel; Heuberger, Albert; Brauer, Hartmut; Töpfer, Hannes;
Inductive localization accuracy of a passive 3-D coil in an Industry 4.0 environment. - In: Journal of sensors and sensor systems : JSSS.. - Göttingen : Copernicus Publ., ISSN 2194-878X, Bd. 8 (2019), 1, S. 171-183

In this paper a localization system of a passive 3-D coil is proposed and signal uncertainties due to the 3-D coil's arbitrary orientation are analyzed. The 3-D coil is excited by an alternating primary magnetic field. Geometrically distributed pick-up coils measure the 3-D coil's secondary field. By means of a simulated look-up table that assigns expected voltages from the pick-up coils to the positions of the 3-D coil, the position of the 3-D coil is deduced by a least-squares approach. A basic assumption is that the secondary field is invariant to the orientation of the 3-D coil. This allows a reduction of the computational effort for the look-up table generation and the table search during the localization phase since for each position the field distribution for only one orientation has to be calculated. However, the assumption of invariance to rotation is only valid for a dipole model. In this paper we investigate the localization error introduced by this assumption when using 3-D coils with a geometric extent in an inhomogeneous primary field. Optimized localization methods that decrease the statistical error are proposed. The theoretical results are verified with measurements conducted on a laboratory system.



https://doi.org/10.5194/jsss-8-171-2019
Iqbal, Naveed; Luo, Jian; Schneider, Christian; Dupleich, Diego; Müller, Robert; Häfner, Stephan; Thomä, Reiner;
Investigating validity of wide-sense stationary assumption in millimeter wave radio channels. - In: IEEE access : practical research, open solutions.. - New York, NY : IEEE, ISSN 2169-3536, Bd. 7 (2019), S. 180073-180082

https://doi.org/10.1109/ACCESS.2019.2957949
Kreismann, Jakob; Kim, Jaewon; Bosch, Martí; Hein, Matthias; Sinzinger, Stefan; Hentschel, Martina;
Superdirectional light emission and emission reversal from microcavity arrays. - In: Physical review research. - College Park, MD : APS, ISSN 2643-1564, Bd. 1 (2019), 3, S. 033171-1-033171-5

https://doi.org/10.1103/PhysRevResearch.1.033171
Krieg, Fabian; Kirchhof, Jan; Kodera, Sayako; Lugin, Sergey; Ihlow, Alexander; Schwender, Thomas; Del Galdo, Giovanni; Römer, Florian; Osman, Ahmad;
SAFT processing for manually acquired ultrasonic measurement data with 3D smartInspect. - In: Insight : non-destructive testing and condition monitoring ; the journal of the British Institute of Non-Destructive Testing.. - Northampton, ISSN 0007-1137, Bd. 61 (2019), 11, S. 663-669

https://doi.org/10.1784/insi.2019.61.11.663
Petkovi´c, Bojana; Dölker, Eva-Maria; Schmidt, Reinhard; Töpfer, Hannes; Haueisen, Jens;
Lorentz force surface integration method: calculation of Lorentz force by means of surface integrals. - In: IEEE transactions on magnetics : a publication of the IEEE Magnetics Society.. - New York, NY : IEEE, ISSN 1941-0069, Bd. 55 (2019), 12, S. 7205307, insges. 7 S.

https://doi.org/10.1109/TMAG.2019.2944799
Nogueira de Sousa, Marcelo; Thomä, Reiner;
Applying random forest and multipath fingerprints to enhance TDOA localization systems. - In: IEEE antennas and wireless propagation letters. - New York, NY : IEEE, ISSN 1548-5757, Bd. 18 (2019), 11, S. 2316-2320

https://doi.org/10.1109/LAWP.2019.2934466
Gutierrez, Sergio; Vega, Felix; González, Fabio A.; Baer, Christoph; Sachs, Jürgen;
Application of polarimetric features and support vector machines for classification of improvised explosive devices. - In: IEEE antennas and wireless propagation letters. - New York, NY : IEEE, ISSN 1548-5757, Bd. 18 (2019), 11, S. 2282-2286

https://doi.org/10.1109/LAWP.2019.2934691
Dupleich, Diego; Müller, Robert; Landmann, Markus; Shinwasusin, Ek-Amorn; Saito, Kentaro; Takada, Jun-ichi; Luo, Jian; Thomä, Reiner; Del Galdo, Giovanni;
Multi-band propagation and radio channel characterization in street canyon scenarios for 5G and beyond. - In: IEEE access : practical research, open solutions.. - New York, NY : IEEE, ISSN 2169-3536, Bd. 7 (2019), S. 160385-160396

https://doi.org/10.1109/ACCESS.2019.2948869
Dürr, André; Schwarz, Dominik; Häfner, Stephan; Geiger, Martin; Roos, Fabian; Hitzler, Martin; Hügler, Philipp; Thomä, Reiner; Waldschmidt, Christian;
High-resolution 160-GHz imaging MIMO radar using MMICs with on-chip frequency synthesizers. - In: IEEE transactions on microwave theory and techniques : MTT ; a publication of the IEEE Microwave Theory and Techniques Society.. - New York, NY : IEEE, Bd. 67 (2019), 9, S. 3897-3907

https://doi.org/10.1109/TMTT.2019.2906176
Yeredor, Arie; Haardt, Martin;
Maximum likelihood estimation of a low-rank probability mass tensor from partial observations. - In: IEEE signal processing letters : a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, ISSN 1558-2361, Bd. 26 (2019), 10, S. 1551-1555

https://doi.org/10.1109/LSP.2019.2938663
Stegner, Johannes; Fischer, Michael; Gropp, Sebastian; Stehr, Uwe; Hein, Matthias;
MEMS-based RF oscillators using SiCer technology. - In: IEEE microwave magazine. - Piscataway, NJ : IEEE, Bd. 20 (2019), 10, S. 71-85

https://doi.org/10.1109/MMM.2019.2928678
Silva Cortes, Victor; Nowak, Jacek; Chauhan, Vikrant; Stehr, Uwe; Hein, Matthias; Fischer, Georg; Hagelauer, Amelie;
RF MEMS modules. - In: IEEE microwave magazine. - Piscataway, NJ : IEEE, Bd. 20 (2019), 10, S. 44-55

https://doi.org/10.1109/MMM.2019.2928676
Fischer, Michael; Gropp, Sebastian; Stegner, Johannes; Frank, Astrid; Hoffmann, Martin; Müller, Jens;
Silicon-ceramic composite substrate. - In: IEEE microwave magazine. - Piscataway, NJ : IEEE, Bd. 20 (2019), 10, S. 28-43

https://doi.org/10.1109/MMM.2019.2928675
Stehr, Uwe; Hagelauer, Amelie; Hein, Matthias;
SiCer: meeting the challenges of tomorrow's complex electronic systems. - In: IEEE microwave magazine. - Piscataway, NJ : IEEE, Bd. 20 (2019), 10, S. 26-27, 92
- From the guest editors' desk

https://doi.org/10.1109/MMM.2019.2928614
Schneckenburger, Nicolas; Jost, Thomas; Walter, Michael; Del Galdo, Giovanni; Matolak, David W.; Fiebig, Uwe-Carsten;
Wideband air-ground channel model for a regional airport environment. - In: IEEE transactions on vehicular technology : a publication of the IEEE Vehicular Technology Society.. - New York, NY : IEEE, ISSN 1939-9359, Bd. 68 (2019), 7, S. 6243-6256

https://doi.org/10.1109/TVT.2019.2914337
Alshra'a, Abdullah Soliman; Seitz, Jochen;
Using INSPECTOR device to stop packet injection attack in SDN. - In: IEEE communications letters. - New York, NY : IEEE, ISSN 1089-7798, Bd. 23 (2019), 7, S. 1174-1177

https://doi.org/10.1109/LCOMM.2019.2896928
Podkurkov, Ivan; Zhang, Jianshu; Nadeev, Adel Firadovich; Haardt, Martin;
Efficient multidimensional wideband parameter estimation for OFDM based joint radar and communication systems. - In: IEEE access : practical research, open solutions.. - New York, NY : IEEE, ISSN 2169-3536, Bd. 7 (2019), S. 112792-112808

https://doi.org/10.1109/ACCESS.2019.2927326
Singh, Jasmeet; Stephan, Ralf; Hein, Matthias;
Low-profile penta-band automotive patch antenna using horizontal stacking and corner feeding. - In: IEEE access : practical research, open solutions.. - New York, NY : IEEE, ISSN 2169-3536, Bd. 7 (2019), S. 74198-74205

https://doi.org/10.1109/ACCESS.2019.2919730
Dölker, Eva-Maria; Schmidt, Reinhard; Brauer, Hartmut; Haueisen, Jens;
Velocity-dependent Lorentz force evaluation: a simulation study. - In: IEEE transactions on magnetics : a publication of the IEEE Magnetics Society.. - New York, NY : IEEE, ISSN 1941-0069, Bd. 55 (2019), 6, S. 6201104, insges. 4 S.

https://doi.org/10.1109/TMAG.2019.2901579
Häfner, Stephan; Käske, Martin; Thomä, Reiner;
On calibration and direction finding with uniform circular arrays. - In: International journal of antennas and propagation : IJAP.. - New York, NY : Hindawi, ISSN 1687-5877, (2019), Article ID 1523469, Seite 1-12

https://doi.org/10.1155/2019/1523469
Singh, Jasmeet; Stephan, Ralf; Hein, Matthias;
Low-profile wideband differentially fed di-patch antenna closely above metallic ground. - In: IEEE antennas and wireless propagation letters. - New York, NY : IEEE, ISSN 1548-5757, Bd. 18 (2019), 5, S. 976-980

https://doi.org/10.1109/LAWP.2019.2906825
Zanatta, Mateus; da RosaLópes de Mendon¸ca, Fábio Lúcio; Antreich, Felix; Valle de Lima, Daniel; Kehrle Miranda, Ricardo; Del Galdo, Giovanni; Costa, João Paulo Carvalho Lustosa da;
Tensor-based time-delay estimation for second and third generation global positioning system. - In: Digital signal processing : a review journal.. - Orlando, Fla. : Academic Press, ISSN 1051-2004, Bd. 92 (2019), S. 1-19

https://doi.org/10.1016/j.dsp.2019.04.003
Cen, Wei; Hoppe, Ralph; Sun, Aiwu; Ding, Hongyan; Gu, Ning;
Machine-readable Yin-Yang imbalance: traditional Chinese medicine syndrome computer modeling based on three-dimensional noninvasive cardiac electrophysiology imaging. - In: The journal of international medical research. - London : Sage, ISSN 1473-2300, Bd. 47 (2019), 4, S. 1580-1591

https://doi.org/10.1177/0300060518824247
Iqbal, Naveed; Luo, Jian; Müller, Robert; Steinböck, Gerhard; Schneider, Christian; Dupleich, Diego; Häfner, Stephan; Thomä, Reiner;
Multipath cluster fading statistics and modeling in millimeter-wave radio channels. - In: IEEE transactions on antennas and propagation : a publication of the IEEE Antennas and Propagation Society.. - New York, NY : IEEE, ISSN 0018-926X, Bd. 67 (2019), 4, S. 2622-2632

https://doi.org/10.1109/TAP.2019.2894277
Gannot, Sharon; Haardt, Martin; Kellermann, Walter; Willett, Peter;
Introduction to the issue on acoustic source localization and tracking in dynamic real-life scenes. - In: IEEE journal of selected topics in signal processing. - New York, NY : IEEE, ISSN 1941-0484, Bd. 13 (2019), 1, S. 3-7
- Editorial

https://doi.org/10.1109/JSTSP.2019.2906923
Alazab Elkhouly, Mostafa; König, Jonas; Beuster, Niklas; Raschke, Florian; Ihlow, Alexander; Robinson, Colin; Orus-Perez, Raul; Schurig, Fritz; Knopp, Andreas; Heuberger, Albert; Landmann, Markus; Del Galdo, Giovanni;
Standardized testing conditions for satellite communications on-the-move (SOTM) terminals. - In: International journal of satellite communications and networking. - New York, NY [u.a.] : Wiley, ISSN 1542-0981, Bd. 37 (2019), 3, S. 163-182

https://doi.org/10.1002/sat.1272
Cichon, Daniel; Psiuk, Rafael; Brauer, Hartmut; Töpfer, Hannes;
A Hall-Sensor-based localization method with six degrees of freedom using Unscented Kalman Filter. - In: IEEE sensors journal. - New York, NY : IEEE, ISSN 1558-1748, Bd. 19 (2019), 7, S. 2509-2516

Magnetic sensors are widely used in automotive and industrial applications to measure linear or angular movements. Although the measurement of the magnetic field vector offers the opportunity to estimate all mechanical degrees of freedom, previous approaches could not be applied in these environments. This paper presents an improved method for sensing a magnetic source's position and orientation with six degrees of freedom. To solve the underlying inverse magnetostatic problem, an Unscented Kalman Filter in combination with an analytical model of the magnetic source's field is used. The performance of the method is demonstrated on the basis of a novel multiaxis input device. It comprises a cuboid magnet and a CMOS (Complementary metal-oxide-semiconductor) Hall-Sensor array with up to 36 elements. The localization algorithm and the measurement model are implemented in an efficient way to achieve real-time capability and sampling rates up to 80 Hz on embedded hardware. This outperforms known methods significantly and allows for a wide application of multi-degree of freedom sensors. Moreover, an absolute position and orientation accuracy of 71 [my]m and 1.4 are achieved. The work describes the basis for advanced input devices but can also be transferred to other kinds of magnetic localization problems.



https://doi.org/10.1109/JSEN.2018.2887299
Ley, Sebastian; Schilling, Susanne; Fiser, Ondrej; Vrba, Jan; Sachs, Jürgen; Helbig, Marko;
Ultra-wideband temperature dependent dielectric spectroscopy of porcine tissue and blood in the microwave frequency range. - In: Sensors. - Basel : MDPI, ISSN 1424-8220, Bd. 19 (2019), 7, 1707, insges. 21 S.

https://doi.org/10.3390/s19071707
Baran, Thomas A.; Frantz, Gene; Mujica, Fernando; Nadar, Mariappan; Sadler, Brian M.; Eldar, Yonina C.; Haardt, Martin; Willett, Peter;
An industry and government perspective on challenges and open problems in signal processing : ICASSP panel. - In: IEEE signal processing magazine : a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 36 (2019), 2, S. 125-131

https://doi.org/10.1109/MSP.2018.2884869
Milanezi Junior, Jayme; Costa, João Paulo C. L.; Römer, Florian; Miranda, Ricardo K.; Marinho, Marco A. M.; Del Galdo, Giovanni;
M-estimator based Chinese Remainder Theorem with few remainders using a Kroenecker product based mapping vector. - In: Digital signal processing : a review journal.. - Orlando, Fla. : Academic Press, ISSN 1051-2004, Bd. 87 (2019), S. 60-74

https://doi.org/10.1016/j.dsp.2019.01.009
Saturnino, Guilherme B.; Thielscher, Axel; Madsen, Kristoffer H.; Knösche, Thomas R.; Weise, Konstantin;
A principled approach to conductivity uncertainty analysis in electric field calculations. - In: NeuroImage : a journal of brain function.. - Orlando, Fla. : Academic Press, ISSN 1095-9572, Bd. 188 (2019), S. 821-834

Uncertainty surrounding ohmic tissue conductivity impedes accurate calculation of the electric fields generated by non-invasive brain stimulation. We present an efficient and generic technique for uncertainty and sensitivity analyses, which quantifies the reliability of field estimates and identifies the most influential parameters. For this purpose, we employ a non-intrusive generalized polynomial chaos expansion to compactly approximate the multidimensional dependency of the field on the conductivities. We demonstrate that the proposed pipeline yields detailed insight into the uncertainty of field estimates for transcranial magnetic stimulation (TMS) and transcranial direct current stimulation (tDCS), identifies the most relevant tissue conductivities, and highlights characteristic differences between stimulation methods. Specifically, we test the influence of conductivity variations on (i) the magnitude of the electric field generated at each gray matter location, (ii) its normal component relative to the cortical sheet, (iii) its overall magnitude (indexed by the 98th percentile), and (iv) its overall spatial distribution. We show that TMS fields are generally less affected by conductivity variations than tDCS fields. For both TMS and tDCS, conductivity uncertainty causes much higher uncertainty in the magnitude as compared to the direction and overall spatial distribution of the electric field. Whereas the TMS fields were predominantly influenced by gray and white matter conductivity, the tDCS fields were additionally dependent on skull and scalp conductivities. Comprehensive uncertainty analyses of complex systems achieved by the proposed technique are not possible with classical methods, such as Monte Carlo sampling, without extreme computational effort. In addition, our method has the advantages of directly yielding interpretable and intuitive output metrics and of being easily adaptable to new problems.



https://doi.org/10.1016/j.neuroimage.2018.12.053
Remireddy, Venkatesh; Großmann, Marcus; Landmann, Markus; Del Galdo, Giovanni;
Sub-band versus space-delay precoding for wideband mmWave channels. - In: IEEE wireless communications letters. - [New York, NY] : IEEE, ISSN 2162-2345, Bd. 8 (2019), 1, S. 193-196

https://doi.org/10.1109/LWC.2018.2866250
Boban, Mate; Dupleich, Diego; Iqbal, Naveed; Luo, Jian; Schneider, Christian; Müller, Robert; Yu, Ziming; Steer, David; Jämsä, Tommi; Li, Jian; Thomä, Reiner;
Multi-band vehicle-to-vehicle channel characterization in the presence of vehicle blockage. - In: IEEE access : practical research, open solutions.. - New York, NY : IEEE, ISSN 2169-3536, Bd. 7 (2019), S. 9724-9735

https://doi.org/10.1109/ACCESS.2019.2892238
Cheng, Yao; Haardt, Martin;
Enhanced direct fitting algorithms for PARAFAC2 with algebraic ingredients. - In: IEEE signal processing letters : a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, ISSN 1558-2361, Bd. 26 (2019), 4, S. 533-537

https://doi.org/10.1109/LSP.2019.2897244
Artner, Gerald; Kotterman, Wim; Del Galdo, Giovanni; Hein, Matthias;
Automotive antenna roof for cooperative connected driving. - In: IEEE access : practical research, open solutions.. - New York, NY : IEEE, ISSN 2169-3536, Bd. 7 (2019), S. 20083-20090

https://doi.org/10.1109/ACCESS.2019.2897219
Kehrle Miranda, Ricardo; Costa, João Paulo C. L.; Guo, Binghua; Almeida, André L.F.; Del Galdo, Giovanni; Sousa, Rafael T.;
Low-complexity and high-accuracy semi-blind joint channel and symbol estimation for massive MIMO-OFDM. - In: Circuits, systems and signal processing : CSSP.. - Boston, Mass. : Birkhäuser, ISSN 1531-5878, Bd. 38 (2019), 3, S. 1114-1136

https://doi.org/10.1007/s00034-018-0898-1
Berlt, Philipp; Jäger, Lisa; Schwind, Andreas; Wollenschläger, Frank; Bornkessel, Christian; Hein, Matthias;
Over-the-air testing of automotive antennas and wireless links in the installed state on the basis of LTE downlink communication parameters. - In: Advances in science, technology and engineering systems journal : (ASTESJ).. - Walnut CA, United States : ASTES Publishers, ISSN 2415-6698, Bd. 4 (2019), 1, S. 282-291

https://doi.org/10.25046/aj040127
Sewalkar, Parag; Seitz, Jochen;
Vehicle-to-Pedestrian communication for vulnerable road users: survey, design considerations, and challenges. - In: Sensors. - Basel : MDPI, ISSN 1424-8220, Bd. 19 (2019), 2, 358, insges. 18 S.

https://doi.org/10.3390/s19020358
Thomä, Reiner; Andrich, Carsten; Del Galdo, Giovanni; Döbereiner, Michael; Hein, Matthias; Käske, Martin; Schäfer, Günter; Schieler, Steffen; Schneider, Christian; Schwind, Andreas; Wendland, Philip;
Cooperative passive coherent location: a promising 5G service to support road safety. - In: IEEE communications magazine. - New York, NY : IEEE, ISSN 1558-1896, Bd. 57 (2019), 9, S. 86-92

https://doi.org/10.1109/MCOM.001.1800242
Otterbach, Jan Marc; Schmidt, Reinhard; Brauer, Hartmut; Ziolkowski, Marek; Töpfer, Hannes;
Comparison of defect detection limits in Lorentz force eddy current testing and classical eddy current testing. - In: Journal of sensors and sensor systems : JSSS.. - Göttingen : Copernicus Publ., ISSN 2194-878X, Bd. 7 (2018), 2, S. 453-459

https://doi.org/10.5194/jsss-7-453-2018
Haardt, Martin; Mecklenbräuker, Christoph; Willett, Peter;
Highlights from the Sensor Array and Multichannel Technical Committee : spotlight on the IEEE Signal Processing Society Technical Committees. - In: IEEE signal processing magazine : a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 35 (2018), 5, S. 183-185

https://doi.org/10.1109/MSP.2018.2835718
Zimmermann, Klaus; Gerlach, Erik; Zeidis, Igor; Otterbach, Jan Marc; Töpfer, Hannes; Brauer, Hartmut; Ziolkowski, Marek; Schmidt, Reinhard;
Mechaničeskoe i čislennoe modelirovanie kompaktnoj sistemy dlja defektoskopii indukcionnymi vichrevymi tokami :
Mechanical modeling and simulation of a portable system for Motion Induced Eddy Current Testing. - In: Problems of mechanics. - Tbilisi : Mezhdunarodnaia Federatsiia po mashinam i mekhanizmam Gruzii, ISSN 1512-0740, (2018), No. 3(72), S. 17-28

The paper deals with the mechanical modeling of a sensor concept in the framework of Motion Induced Eddy Current Testing (MIECT). The system consists of a magnet arrangement with two axially magnetized cylinder magnets, which are fixed to a shaft, driven by a motor with a constant angular velocity. A pick-up coil, assembled around the magnet arrangement and fixed to the sensors framework, measures the magnetic flux varying in time. The mechanical behavior of this experimental setup is analyzed using analytical and numerical methods. The main conclusions concerning the systems behavior are made with the asymptotic method. The investigations based on methods of Bogoliubov & Mitropolski show, that the main contribution to the solution is given by the first fundamental harmonic. The exact equation of motion is integrated numerically. The results of the theoretic investigations are compared with experimental data.



Artner, Gerald; Kotterman, Wim; Del Galdo, Giovanni; Hein, Matthias A.;
Conformal automotive roof-top antenna cavity with increased coverage to vulnerable road users. - In: IEEE antennas and wireless propagation letters. - New York, NY : IEEE, ISSN 1548-5757, Bd. 17 (2018), 12, S. 2399-2403

https://doi.org/10.1109/LAWP.2018.2876628
Biswas, Shantonu; Reiprich, Johannes; Pezoldt, Jörg; Hein, Matthias; Stauden, Thomas; Jacobs, Heiko O.;
Stress-adaptive meander track for stretchable electronics. - In: Flexible and printed electronics. - Philadelphia, PA : IOP Publishing, ISSN 2058-8585, Bd. 3 (2018), 3, 032001, insges. 7 S.

https://doi.org/10.1088/2058-8585/aad583
Krug, Silvia; Aumüller, Matthias; Seitz, Jochen;
Hybrid scheme to enable DTN routing protocols to efficiently exploit stable MANET contacts. - In: EURASIP journal on wireless communications and networking : EURASIP JWCN.. - Heidelberg : Springer, ISSN 1687-1499, (2018), 237, insges. 13 S.

https://doi.org/10.1186/s13638-018-1248-5
Shirichian, Mehdi; Chamaani, Somayyeh; Akbarpour, Alireza; Del Galdo, Giovanni;
Analysis and design of broadband simultaneous wireless information and power transfer (SWIPT) system considering rectifier effect. - In: Energies : open-access journal of related scientific research, technology development and studies in policy and management.. - Basel : MDPI, ISSN 1996-1073, Bd. 11 (2018), 9, 2387, insges. 18 S.

https://doi.org/10.3390/en11092387
Schneckenburger, Nicolas; Jost, Thomas; Shutin, Dmitriy; Walter, Michael; Del Galdo, Giovanni; Fiebig, Uwe-Carsten;
Reflector localization for geometrical modeling the air-ground channel. - In: IEEE transactions on vehicular technology : a publication of the IEEE Vehicular Technology Society.. - New York, NY : IEEE, ISSN 1939-9359, Bd. 67 (2018), 9, S. 7994-8008

https://doi.org/10.1109/TVT.2018.2849686
Weiss, Amir; Cheema, Sher Ali; Haardt, Martin; Yeredor, Arie;
Performance analysis of the Gaussian quasi-maximum likelihood approach for independent vector analysis. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 66 (2018), 19, S. 5000-5013

https://doi.org/10.1109/TSP.2018.2863656
Fiser, Ondrej; Helbig, Marko; Sachs, Jürgen; Ley, Sebastian; Merunka, Ilja; Vrba, Jan;
Microwave non-invasive temperature monitoring using UWB radar for cancer treatment by hyperthermia. - In: Progress in electromagnetics research : PIER.. - Cambridge, Mass. : EMW, ISSN 1559-8985, Bd. 162 (2018), S. 1-14

http://dx.doi.org/10.2528/PIER17111609
Sangodoyin, Seun; Kristem, Vinod; Bas, C. Umit; Käske, Martin; Lee, Juho; Schneider, Christian; Sommerkorn, Gerd; Zhang, Charlie; Thomä, Reiner; Molisch, Andreas F.;
Cluster characterization of 3-D MIMO propagation channel in an urban macrocellular environment. - In: IEEE transactions on wireless communications. - New York, NY : IEEE, Bd. 17 (2018), 8, S. 5076-5091

https://doi.org/10.1109/TWC.2018.2837088
Baer, Christoph; Musch, Thomas; Rolfes, Ilona; Sachs, Jürgen;
The war on landmines. - In: German research : magazine of the Deutsche Forschungsgemeinschaft.. - Weinheim : Wiley-VCH, ISSN 1522-2322, Bd. 40 (2018), 1, S. 12-15

https://doi.org/10.1002/germ.201870103
Dölker, Eva-Maria; Schmidt, Reinhard; Gorges, Stephan; Otterbach, Jan Marc; Petkovi´c, Bojana; Eichardt, Roland; Brauer, Hartmut; Haueisen, Jens;
Elastic Net Regularization in Lorentz force evaluation. - In: NDT & E international : independent nondestructive testing and evaluation.. - Amsterdam [u.a.] : Elsevier Science, Bd. 99 (2018), S. 141-154

https://doi.org/10.1016/j.ndteint.2018.07.002
Gutierrez, Sergio; Just, Thomas; Sachs, Jürgen; Baer, Christoph; Vega, Felix;
Field-deployable system for the measurement of complex permittivity of improvised explosives and lossy dielectric materials. - In: IEEE sensors journal. - New York, NY : IEEE, ISSN 1558-1748, Bd. 18 (2018), 16, S. 6706-6714

https://doi.org/10.1109/JSEN.2018.2849322
Petkovi´c, Bojana; Dölker, Eva-Maria; Schmidt, Reinhard; Haueisen, Jens;
Method of fundamental solutions applied to 3-D velocity induced eddy current problems. - In: IEEE transactions on magnetics : a publication of the IEEE Magnetics Society.. - New York, NY : IEEE, ISSN 1941-0069, Bd. 54 (2018), 8, S. 6201610, insges. 10 S.

https://doi.org/10.1109/TMAG.2018.2839098
Semper, Sebastian; Römer, Florian; Hotz, Thomas; Del Galdo, Giovanni;
Sparsity order estimation from a single compressed observation vector. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 66 (2018), 15, S. 3958-3971

https://doi.org/10.1109/TSP.2018.2841867
Stegner, Johannes; Gropp, Sebastian; Podoskin, Dmitry; Stehr, Uwe; Hoffmann, Martin; Hein, Matthias;
An analytical temperature-dependent design model for contour-mode MEMS resonators and oscillators verified by measurements. - In: Sensors. - Basel : MDPI, ISSN 1424-8220, Bd. 18 (2018), 7, 2159, insges. 21 S.

https://doi.org/10.3390/s18072159
Sachs, Jürgen; Ley, Sebastian; Just, Thomas; Chamaani, Somayyeh; Helbig, Marko;
Differential ultra-wideband microwave imaging: principle application challenges. - In: Sensors. - Basel : MDPI, ISSN 1424-8220, Bd. 18 (2018), 7, 2136, insges. 32 S.

https://doi.org/10.3390/s18072136
Cen, Wei; Hoppe, Ralph; Sun, Aiwu; Gu, Ning; Lu, Rongbo;
Gradient of the temperature function at the voxel (i, j, k) for heterogeneous bio-thermal model. - In: AIP Advances. - New York, NY : American Inst. of Physics, ISSN 2158-3226, Bd. 8 (2018), 6, S. 065101, insges. 9 S.

https://doi.org/10.1063/1.5018457
Cheema, Sher Ali; Wolf, Mike; Hümer, Mario; Haardt, Martin;
Unique word DMT schemes using real-valued constellations for IM/DD optical systems. - In: IEEE photonics technology letters : PTL ; a publication of the IEEE Laser and Electro-Optics Society.. - New York, NY : IEEE, Bd. 30 (2018), 10, S. 935-938

https://doi.org/10.1109/LPT.2018.2808761
Andrich, Carsten; Ihlow, Alexander; Bauer, Julia; Beuster, Niklas; Del Galdo, Giovanni;
High-precision measurement of sine and pulse reference signals using software-defined radio. - In: IEEE transactions on instrumentation and measurement : IM ; a publication of the Instrumentation and Measurement Society.. - New York, NY : IEEE, Bd. 67 (2018), 5, S. 1132-1141

https://doi.org/10.1109/TIM.2018.2794940
Ling, Cen; Yin, Xuefeng; Müller, Robert; Häfner, Stephan; Dupleich, Diego; Schneider, Christian; Luo, Jian; Yan, Hua; Thomä, Reiner;
Double-directional dual-polarimetric cluster-based characterization of 70-77 GHz indoor channels. - In: IEEE transactions on antennas and propagation : a publication of the IEEE Antennas and Propagation Society.. - New York, NY : IEEE, ISSN 0018-926X, Bd. 66 (2018), 2, S. 857-870

https://doi.org/10.1109/TAP.2017.2772019
Bellizzi, Gennaro; Bellizzi, Gennaro Giovanni; Bucci, Ovidio M.; Crocco, Lorenzo; Helbig, Marko; Ley, Sebastian; Sachs, Jürgen;
Optimization of the working conditions for magnetic nanoparticle-enhanced microwave diagnostics of breast cancer. - In: IEEE transactions on biomedical engineering : a publication of the IEEE Engineering in Medicine and Biology Society.. - New York, NY : IEEE, ISSN 1558-2531, Bd. 65 (2018), 7, S. 1607-1616

https://doi.org/10.1109/TBME.2017.2753846
Krug, Silvia; Töpfer, Hannes; Hutschenreuther, Tino; Seitz, Jochen;
Towards robust communications of wireless sensor networks in vehicular environments: a case study. - In: Journal of Communications Software and Systems. - Split : Croatian Communications and Information Society (CCIS), ISSN 1846-6079, Bd. 13 (2017), 4, S. 157-164

Wireless Sensor Networks are popular solutions for various applications in order to reduce the efforts required by traditional cable-based systems. If the system in question is used to monitor and control physical processes, robust and reliable communication services have to be provided by the network. This is especially true for industrial or vehicular applications where the nodes are deployed in environments facing harsh propagation conditions. Usually, the effect of this on the system performance is studied on isolated layers of the OSI-reference model only. Therefore, we present results from a measurement campaign of vehicular environments that try to estimate the achievable robustness with respect to multiple OSI layers. Our results show that even if the link is rather poor, protocols on the upper layers are able to compensate this at the cost of additional delay.



http://dx.doi.org/10.24138/jcomss.v13i4.364
Ling, Cen; Yin, Xuefeng; Wang, Haowen; Thomä, Reiner S.;
Experimental characterization and multipath cluster modeling for 13-17 GHz indoor propagation channels. - In: IEEE transactions on antennas and propagation : a publication of the IEEE Antennas and Propagation Society.. - New York, NY : IEEE, ISSN 0018-926X, Bd. 65 (2017), 12, S. 6549-6561

https://doi.org/10.1109/TAP.2017.2769133
Pralon, Mariana G.; Del Galdo, Giovanni; Landmann, Markus; Hein, Matthias A.; Thomä, Reiner S.;
Suitability of compact antenna arrays for direction-of-arrival estimation. - In: IEEE transactions on antennas and propagation : a publication of the IEEE Antennas and Propagation Society.. - New York, NY : IEEE, ISSN 0018-926X, Bd. 65 (2017), 12, S. 7244-7256

https://doi.org/10.1109/TAP.2017.2757968
Warda, Ahmad; Petkovi´c, Bojana; Töpfer, Hannes;
Indoor localization: novel RSSI approach based on analytical solution and two receivers. - In: Journal of sensors and sensor systems : JSSS.. - Göttingen : Copernicus Publ., ISSN 2194-878X, Bd. 6 (2017), 2, S. 375-380

https://doi.org/10.5194/jsss-6-375-2017
Warda, Ahmad; Petkovi´c, Bojana; Töpfer, Hannes;
Scanning method for indoor localization using the RSSI approach. - In: Journal of sensors and sensor systems : JSSS.. - Göttingen : Copernicus Publ., ISSN 2194-878X, Bd. 6 (2017), 1, S. 247-251

This paper presents a scanning method for indoor mobile robot localization using the received signal strength indicator (RSSI) approach. The method eliminates the main drawback of the conventional fingerprint, whose database construction is time-consuming and which needs to be rebuilt every time a change in indoor environment occurs. It directly compares the column vectors of a kernel matrix and signal strength vector using the Euclidean distance as a metric. The highest resolution available in localization using a fingerprint is restricted by a resolution of a set of measurements performed prior to localization. In contrast, resolution using the scanning method can be easily changed using a denser grid of potential sources. Although slightly slower than the trilateration method, the scanning method outperforms it in terms of accuracy, and yields a reconstruction error of only 0. 08 m averaged over 1600 considered source points in a room with dimensions 9.7 m × 4.7 m × 3 m. Its localization time of 0. 39 s makes this method suitable for real-time localization and tracking.



https://doi.org/10.5194/jsss-6-247-2017
Steinwandt, Jens; Römer, Florian; Haardt, Martin;
Generalized least squares for ESPRIT-type direction of arrival estimation. - In: IEEE signal processing letters : a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, ISSN 1558-2361, Bd. 24 (2017), 11, S. 1681-1685

https://doi.org/10.1109/LSP.2017.2751303
Weiss, Amir; Yeredor, Arie; Cheema, Sher Ali; Haardt, Martin;
The extended "Sequentially Drilled" Joint Congruence transformation and its application in Gaussian independent vector analysis. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 65 (2017), 23, S. 6332-6344

https://doi.org/10.1109/TSP.2017.2750107
Cheema, Sher Ali; Balda, Emilio Rafael; Wolf, Mike; Haardt, Martin;
Unique word DMT schemes for optical systems with intensity modulation and direct detection. - In: Journal of lightwave technology : LT ; JLT ; a joint IEEE-OSA publication.. - Washington, DC : OSA, ISSN 0733-8724, Bd. 35 (2017), 18, S. 3862-3869

https://doi.org/10.1109/JLT.2017.2718506
Cen, Wei; Hoppe, Ralph; Lu, Rongbo; Cai, Zhaoquan; Gu, Ning;
3D highly heterogeneous thermal model of pineal gland in-vitro study for electromagnetic exposure using finite volume method. - In: AIP Advances. - New York, NY : American Inst. of Physics, ISSN 2158-3226, Bd. 7 (2017), 8, S. 085222, insges. 9 S.

http://dx.doi.org/10.1063/1.4991464
Yeryomin, Yevgeniy; Debes, Maik; Seitz, Jochen;
Framework for a flexible comprehensive multiple-criteria network selection for mobile heterogeneous networks. - In: Journal of telecommunications system & management. - Los Angeles : OMICS International, ISSN 2167-0919, Bd. 6 (2017), 1, 153, insges. 11 S.

https://doi.org/10.4172/2167-0919.1000153
Galibus, Tatiana; Vieira, Thiago P.; Freitas, Edison Pignaton; Albuquerque, Robson de Oliveira; Costa, João Paulo C. L.; Sousa, Rafael T.; Krasnoproshin, Viktor; Zaleski, Anton; Vissia, H. E. R. M.; del Galdo, Giovanni;
Offline mode for corporate mobile client security architecture. - In: Mobile networks and applications : the journal of special issues on mobility of systems, users, data and computing.. - New York, NY : ACM, ISSN 1572-8153, Bd. 22 (2017), 4, S. 743-759

https://doi.org/10.1007/s11036-017-0839-4
Arévalo, Leonel; Lamare, Rodrigo C.; Haardt, Martin; Sampaio-Neto, Raimundo;
Decoupled signal detection for the uplink of massive MIMO in 5G heterogeneous networks. - In: EURASIP journal on wireless communications and networking : EURASIP JWCN.. - Heidelberg : Springer, ISSN 1687-1499, (2017), 131, insges. 15 S.

https://doi.org/10.1186/s13638-017-0916-1
Bollig, Andreas; Lavrenko, Anastasia; Arts, Martijn Franciscus; Mathar, Rudolf;
Compressive cyclostationary spectrum sensing with a constant false alarm rate. - In: EURASIP journal on wireless communications and networking : EURASIP JWCN.. - Heidelberg : Springer, ISSN 1687-1499, (2017), 135, insges. 13 S.

https://doi.org/10.1186/s13638-017-0920-5
Kristem, Vinod; Sangodoyin, Seun; Bas, C. Umit; Käske, Martin; Lee, Juho; Schneider, Christian; Sommerkorn, Gerd; Zhang, Charlie; Thomä, Reiner; Molisch, Andreas F.;
3D MIMO outdoor-to-indoor propagation channel measurement. - In: IEEE transactions on wireless communications. - New York, NY : IEEE, Bd. 16 (2017), 7, S. 4600-4613

https://doi.org/10.1109/TWC.2017.2700391
Lavrenko, Anastasia; Römer, Florian; Del Galdo, Giovanni; Thomä, Reiner;
On the SNR variability in noisy compressed sensing. - In: IEEE signal processing letters : a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, ISSN 1558-2361, Bd. 24 (2017), 8, S. 1148-1152

https://doi.org/10.1109/LSP.2017.2689243
Tu, Cheng; Frank, Astrid; Michael, Steffen; Stegner, Johannes; Stehr, Uwe; Hein, Matthias; Lee, Josh E.-Y.;
Applying laser Doppler vibrometry to probe anchor losses in MEMS AlN-on-Si contour mode resonators. - In: Sensors and actuators. - Amsterdam [u.a.] : Elsevier Science, ISSN 1873-3069, Bd. 263 (2017), S. 188-197

https://doi.org/10.1016/j.sna.2017.06.003
Fuschini, Franco; Häfner, Stephan; Zoli, Marco; Müller, Robert; Vitucci, Enrico Maria; Dupleich, Diego; Barbiroli, Marina; Luo, Jian; Schulz, Egon; Degli-Esposti, Vittorio; Thomä, Reiner;
Analysis of in-room mm-wave propagation: directional channel measurements and ray tracing simulations. - In: Journal of infrared, millimeter, and terahertz waves. - New York, NY : Springer, ISSN 1866-6906, Bd. 38 (2017), 6, S. 727-744

https://doi.org/10.1007/s10762-017-0366-1
Mengelkamp, Judith; Carlstedt, Matthias; Weise, Konstantin; Ziolkowski, Marek; Brauer, Hartmut; Haueisen, Jens;
Current density reconstructions for Lorentz force evaluation. - In: Research in nondestructive evaluation. - Philadelphia, Pa. : Taylor & Francis, ISSN 1432-2110, Bd. 28 (2017), 2, S. 76-100

The detection and reconstruction of fatigue fractures is of great interest in quality assurance. In the framework of nondestructive testing, Lorentz force evaluation (LFE) is an evaluation technique to estimate flaws in electrically conductive materials based on measured Lorentz forces. In the forward solution for LFE, a defect can be interpreted as a distributed current source. This has motivated the authors to propose current density reconstructions (CDRs) calculated with minimum norm estimates to estimate defect geometries. The L1 and L2 norms tend to produce a solution which is either very focused or very smeared. To balance these constraints, the general Lp norm with 1 ≤ p ≤ 2 was used and the inverse solutions compared. This approach was applied to measured data obtained from a laminated composite and simulated data from a monolithic material. The results show that the L1.5 norm provides the most accurate inverse solutions. The location and extent of the defect are determined with an error of 15 % relative to the size of the defect. The depth estimation has a deviation of 50 %. It can be concluded that CDRs are a powerful method to reconstruct and characterize defects in LFE.



http://dx.doi.org/10.1080/09349847.2015.1111483
Vieira, Thiago P. B.; Tenório, Danilo F.; Costa, João Paulo C. L.; Freitas, Edison P.; Del Galdo, Giovanni; Sousa Júnior, Rafael T.;
Model order selection and eigen similarity based framework for detection and identification of network attacks. - In: Journal of network and computer applications. - London : Academic Press, ISSN 1084-8045, Bd. 90 (2017), S. 26-41

https://doi.org/10.1016/j.jnca.2017.04.012
Baer, Christoph; Rolfes, Ilona; Musch, Thomas; Sachs, Jürgen;
Im Kampf gegen Landminen. - In: Forschung : das Magazin der Deutschen Forschungsgemeinschaft.. - Berlin : Wiley-VCH, ISSN 1522-2357, Bd. 42 (2017), 1, S. 20-23

https://doi.org/10.1002/fors.201790001
Ibrahim, Mohamed; Ramireddy, Venkatesh; Lavrenko, Anastasia; König, Jonas; Römer, Florian; Landmann, Markus; Großmann, Marcus; Del Galdo, Giovanni; Thomä, Reiner S.;
Design and analysis of compressive antenna arrays for direction of arrival estimation. - In: Signal processing : a European journal devoted to the methods and applications of signal processing.. - Amsterdam [u.a.] : Elsevier, Bd. 138 (2017), S. 35-47

http://dx.doi.org/10.1016/j.sigpro.2017.03.013
Steinwandt, Jens; Römer, Florian; Haardt, Martin; Del Galdo, Giovanni;
Performance analysis of multi-dimensional ESPRIT-type algorithms for arbitrary and strictly non-circular sources with spatial smoothing. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 65 (2017), 9, S. 2262-2276

https://doi.org/10.1109/TSP.2017.2652388
Gomes, Paulo R. B.; Almeida, André L. F.; Costa, João Paulo C. L.; Mota, João C. M.; Valle de Lima, Daniel; Del Galdo, Giovanni;
Tensor-based methods for blind spatial signature estimation in multidimensional sensor arrays. - In: International journal of antennas and propagation : IJAP.. - New York, NY : Hindawi, ISSN 1687-5877, Bd. 2017 (2017), Article ID 1615962, insges. 11 S.

https://doi.org/10.1155/2017/1615962
Kehrle Miranda, Ricardo; Costa, João Paulo C. L.; Römer, Florian; Menezes, Leonardo R. A. X.; Del Galdo, Giovanni; Almeida, André L. F.;
Low complexity performance assessment of a sensor array via unscented transformation. - In: Digital signal processing : a review journal.. - Orlando, Fla. : Academic Press, ISSN 1051-2004, Bd. 63 (2017), S. 190-198

http://dx.doi.org/10.1016/j.dsp.2017.01.007
Petkovi´c, Bojana; Weise, Konstantin; Haueisen, Jens;
Computation of Lorentz force and 3-D eddy current distribution in translatory moving conductors in the field of a permanent magnet. - In: IEEE transactions on magnetics : a publication of the IEEE Magnetics Society.. - New York, NY : IEEE, ISSN 1941-0069, Bd. 53 (2017), 2, S. 7000109, insges. 9 S.

Determination of the 3-D eddy current distribution inside a translatory moving conductor under a permanent magnet can accurately be done by using finite-element method (FEM). However, FEM calculations are very expensive, as they require discretization of the whole conductor volume. In this paper, we propose a new technique, to be called boundary element source method (BESM), where only boundary layers are discretized. The BESM is a modification of the hybrid boundary element method (HBEM). In the BESM, the concentrated point sources placed at the centers of boundary elements for the HBEM are replaced by distributed charge density over the area of the boundary element. This is especially useful in the regions, where neighboring boundary meshes significantly affect one another and when calculation point of eddy current is very close or belong to the surface of a boundary element. The method can handle arbitrary geometries of the specimen as well as the defect and arbitrary orientation of the magnetization vector. The accuracy of the proposed method is verified by comparing the results with the solutions obtained from a finite-element model. The proposed BESM approach is shown to be simple, robust, and computationally accurate.



https://doi.org/10.1109/TMAG.2016.2622223
Reis, Paulo Max Gil Innocencio; Costa, João Paulo Carvalho Lustosa; Kehrle Miranda, Ricardo; Del Galdo, Giovanni;
ESPRIT-Hilbert-based audio tampering detection with SVM classifier for forensic analysis via electrical network frequency. - In: IEEE transactions on information forensics and security. - New York, NY : IEEE, ISSN 1556-6021, Bd. 12 (2017), 4, S. 853-864

https://doi.org/10.1109/TIFS.2016.2636095
Gomes, Paulo R. B.; Almeida, André L. F.; Costa, João Paulo C. L.; Del Galdo, Giovanni;
Tensor-based methods for blind spatial signature estimation under arbitrary and unknown source covariance structure. - In: Digital signal processing : a review journal.. - Orlando, Fla. : Academic Press, ISSN 1051-2004, Bd. 62 (2017), S. 197-210

http://dx.doi.org/10.1016/j.dsp.2016.12.003
Becker, Hanna; Chevalierc, Pascal; Haardt, Martin;
Higher order direction finding from rectangular cumulant matrices: the rectangular 2q-MUSIC algorithms. - In: Signal processing : a European journal devoted to the methods and applications of signal processing.. - Amsterdam [u.a.] : Elsevier, Bd. 133 (2017), S. 240-249

http://dx.doi.org/10.1016/j.sigpro.2016.10.020
Salous, Sana; Degli Esposti, Vittorio; Fuschini, Franco; Dupleich, Diego; Müller, Robert; Thomä, Reiner; Haneda, Katsuyuki; Garcia-Pardo, Jose-Maria Molina; Garcia, Juan Pascual; Gaillot, Davy P.; Nekovee, Maziar; Hur, Sooyoung;
Millimeter-wave propagation : characterization and modeling toward fifth-generation systems. - In: IEEE antennas & propagation magazine. - New York, NY : IEEE, ISSN 1558-4143, Bd. 58 (2016), 6, S. 115-127

https://doi.org/10.1109/MAP.2016.2609815
Boyer, Rémy; Haardt, Martin;
Noisy compressive sampling based on block-sparse tensors: performance limits and beamforming techniques. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 64 (2016), 23, S. 6075-6088

http://dx.doi.org/10.1109/TSP.2016.2600510
Pérez-Neira, Ana I.; Caus, Màrius; Zakaria, Rostom; Le Ruyet, Didier; Kofidis, Eleftherios; Haardt, Martin; Mestre, Xavier; Cheng, Yao;
MIMO signal processing in offset-QAM based filter bank multicarrier systems. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 64 (2016), 21, S. 5733-5762
- Overview Article

http://dx.doi.org/10.1109/TSP.2016.2580535
Rovensky, Tibor; Pietrikova, Alena; Vehec, Igor; Kmec, Martin;
Influence of various multilayer LTCC systems on dielectric properties' stability in GHz frequency range. - In: Microelectronics international. - Bingley : Emerald, ISSN 1758-812X, Bd. 33 (2016), 3, S. 136-140

http://dx.doi.org/10.1108/MI-03-2016-0028
Ruman, Kornel; Pietrikova, Alena; Galajda, Pavol; Vehec, Igor; Rovensky, Tibor; Kmec, Martin;
A new approach to construction of extended kit for M-Sequence UWB sensor system based on LTCC. - In: Microelectronics international. - Bingley : Emerald, ISSN 1758-812X, Bd. 33 (2016), 3, S. 130-135

http://dx.doi.org/10.1108/MI-03-2016-0029
Carlstedt, Matthias; Weise, Konstantin; Ziolkowski, Marek; Schmidt, Reinhard; Brauer, Hartmut;
Estimation of Lorentz force from dimensional analysis: similarity solutions and scaling laws. - In: IEEE transactions on magnetics : a publication of the IEEE Magnetics Society.. - New York, NY : IEEE, ISSN 1941-0069, Bd. 52 (2016), 8, S. 7004813, insges. 13 S.

http://dx.doi.org/10.1109/TMAG.2016.2539927
Steinwandt, Jens; Römer, Florian; Haardt, Martin; Del Galdo, Giovanni;
Deterministic Cramér-Rao bound for strictly non-circular sources and analytical analysis of the achievable gains. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 64 (2016), 17, S. 4417-4431

http://dx.doi.org/10.1109/TSP.2016.2566603
Schleichert, Jan; Carlstedt, Matthias; Marangoni, Rafael R.; Rahneberg, Ilko; Fröhlich, Thomas;
Dynamic characterization of a three-component force sensor using a Lorentz force load changer :
Dynamische Charakterisierung eines Dreikomponenten Kraftsensors mit Hilfe eines Lorentzkraft-Lastwechslers. - In: Technisches Messen : tm ; Sensoren, Geräte, Systeme ; Organ des AMA Fachverbands für Sensorik e.V. und der NAMUR, Normenarbeitsgemeinschaft für Mess- und Regelungstechnik der Chemischen Industrie.. - Berlin : De Gruyter, ISSN 2196-7113, Bd. 83 (2016), 7/8, S. 430-438

http://dx.doi.org/10.1515/teme-2015-0089
Rügamer, Alexander; Schirmer, Christopher; Lorenz, Mario; Taschke, Simon; Großmann, Marcus; Landmann, Markus; Felber, Wolfgang;
Setup and verification of a multi-GNSS over-the-air wave field synthesis testbed. - In: Proceedings of the 2016 IEEE/ION Position, Location and Navigation Symposium : PLANS : April 11-14, 2016, Hyatt Regency, Savannah, Georgia.. - [Piscataway, NJ] : IEEE, ISBN 978-1-5090-2042-3, (2016), S. 863-873

http://dx.doi.org/10.1109/PLANS.2016.7479782
Maleš-Ili´ca, Nataša; Atanaskovi´c, Aleksandar; Blau, Kurt; Hein, Matthias;
Linearisation of asymmetrical Doherty amplifier by the even-order non-linear signals. - In: International journal of electronics. - London : Taylor & Francis, ISSN 1362-3060, Bd. 103 (2016), 8, S. 1318-1331

http://dx.doi.org/10.1080/00207217.2015.1104727
Long, Shihe; Khalighi, Mohammad Ali; Wolf, Mike; Bourennane, Salah; Ghassemlooy, Zabih;
Investigating channel frequency selectivity in indoor visible-light communication systems. - In: IET optoelectronics. - London : IET, ISSN 1751-8776, Bd. 10 (2016), 3, S. 80-88

http://dx.doi.org/10.1049/iet-opt.2015.0015
Mengelkamp, Judith; Lattner, Daniela; Haueisen, Jens; Carlstedt, Matthias; Weise, Konstantin; Brauer, Hartmut; Ziolkowski, Marek; Eichardt, Roland;
Lorentz force evaluation with differential evolution. - In: IEEE transactions on magnetics : a publication of the IEEE Magnetics Society.. - New York, NY : IEEE, ISSN 1941-0069, Bd. 52 (2016), 5, S. 6201310, insges. 10 S.

http://dx.doi.org/10.1109/TMAG.2015.2509909
Bayer, Hendrik; Krauß, Alexander; Zaiczek, Tobias; Stephan, Ralf; Enge-Rosenblatt, Olaf; Hein, Matthias A.;
Ka-band user terminal antennas for satellite communications. - In: IEEE antennas & propagation magazine. - New York, NY : IEEE, ISSN 1558-4143, Bd. 58 (2016), 1, S. 76-88

http://dx.doi.org/10.1109/MAP.2015.2501244
Taghizadeh, Omid; Zhang, Jianshu; Haardt, Martin;
Transmit beamforming aided amplify-and-forward MIMO full-duplex relaying with limited dynamic range. - In: Signal processing : a European journal devoted to the methods and applications of signal processing.. - Amsterdam [u.a.] : Elsevier, Bd. 127 (2016), S. 266-281

http://dx.doi.org/10.1016/j.sigpro.2016.02.026
Codecasa, Lorenzo; Di Rienzo, Luca; Weise, Konstantin; Groß, Stefanie; Haueisen, Jens;
Fast MOR-based approach to uncertainty quantification in transcranial magnetic stimulation. - In: IEEE transactions on magnetics : a publication of the IEEE Magnetics Society.. - New York, NY : IEEE, ISSN 1941-0069, Bd. 52 (2016), 3, S. 7200904, insges. 4 S.

http://dx.doi.org/10.1109/TMAG.2015.2475120
Weise, Konstantin; Carlstedt, Matthias; Ziolkowski, Marek; Brauer, Hartmut;
Uncertainty analysis in Lorentz force eddy current testing. - In: IEEE transactions on magnetics : a publication of the IEEE Magnetics Society.. - New York, NY : IEEE, ISSN 1941-0069, Bd. 52 (2016), 3, S. 6200104, insges. 4 S.

http://dx.doi.org/10.1109/TMAG.2015.2480046
Fuschini, Franco; Häfner, Stephan; Zoli, Marco; Müller, Robert; Vitucci, Enrico Maria; Dupleich, Diego; Barbiroli, Marina; Luo, Jian; Schulz, Egon; Degli-Esposti, Vittorio; Thomä, Reiner;
Item level characterization of mm-wave indoor propagation. - In: EURASIP journal on wireless communications and networking : EURASIP JWCN.. - Heidelberg : Springer, ISSN 1687-1499, (2016), 4, insges. 12 S.

https://doi.org/10.1186/s13638-015-0502-3
Carlstedt, Matthias; Brauer, Hartmut; Zimmermann, Klaus; Gerlach, Erik; Uhlig, Robert Peter;
Identification of mechanical systems in Lorentz force eddy current testing. - In: Problems of mechanics. - Tbilisi : Mezhdunarodnaia Federatsiia po mashinam i mekhanizmam Gruzii, ISSN 1512-0740, (2015), No. 4(61), S. 16-31

The paper deals with the mechanical modeling of the dynamics of force-proving instruments in the framework of Lorentz Force Eddy Current Testing (LET). An experimental setup for this kind of measurements is presented and the obtained Lorentz force signals are analyzed. The process of system identification is discussed for two different scenarios, using force profiles, computed in numerical field simulations, as known input signals. In the first case, two independent Single-lnput/Single-Output models were used to describe the dominant dynamical behavior of the experimental setup at relative high velocities. In the second case, a Multi-Input/Multi-Output model with three degree of freedoms is used to model the dynamics of a modified setup with a complex Haibach structure instead of a cylindrical permanent magnet. The signal analysis and the derivation of the Multi-Input/Multi-Output transfer function are emphasized and discussed in detail. LET requires a high velocity constancy during the linear motion of the specimen. Therefore, a mechanisms and its control is discussed, which is generating such aproperty on the output.



Turgaliev, Viacheslav; Kholodnyak, Dmitry; Müller, Jens; Hein, Matthias A.
Small-size low-loss bandpass filters on substrate-integrated waveguide capacitively loaded cavities embedded in low temperature co-fired ceramics. - In: Journal of ceramic science and technology. - Baden-Baden : Göller, Bd. 6 (2015), 4, S. 305-314

http://dx.doi.org/10.4416/JCST2015-00053
Weise, Konstantin; Carlstedt, Matthias; Ziolkowski, Marek; Brauer, Hartmut; Töpfer, Hannes
Lorentz force on permanent magnet rings by moving electrical conductors. - In: IEEE transactions on magnetics : a publication of the IEEE Magnetics Society.. - New York, NY : IEEE, ISSN 1941-0069, Bd. 51 (2015), 12, S. 6202211, insges. 11 S.

http://dx.doi.org/10.1109/TMAG.2015.2464784
Cavalcante, Ítalo Vitor; Almeida, André L. F.; Haardt, Martin
Joint channel estimation for three-hop MIMO relaying systems. - In: IEEE signal processing letters : a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, ISSN 1558-2361, Bd. 22 (2015), 12, S. 2430-2434

http://dx.doi.org/10.1109/LSP.2015.2490251
Ley, Sebastian; Helbig, Marko; Sachs, Jürgen;
Preliminary investigations of magnetic modulated nanoparticles for microwave breast cancer detection. - In: Current directions in biomedical engineering. - Berlin : De Gruyter, ISSN 2364-5504, Bd. 1 (2015), 1, S. 302-305

https://doi.org/10.1515/cdbme-2015-0075
Zetik, Rudolf; Eschrich, Marcus; Jovanoska, Snezhana; Thomä, Reiner
Looking behind a corner using multipath-exploiting UWB radar. - In: IEEE transactions on aerospace and electronic systems : AES.. - New York, NY : IEEE, ISSN 1557-9603, Bd. 51 (2015), 3, S. 1916-1926

http://dx.doi.org/10.1109/TAES.2015.140303
Weise, Konstantin; Ziolkowski, Marek; Carlstedt, Matthias; Brauer, Hartmut; Töpfer, Hannes
Oscillatory motion of permanent magnets above a conducting slab. - In: IEEE transactions on magnetics : a publication of the IEEE Magnetics Society.. - New York, NY : IEEE, ISSN 1941-0069, Bd. 51 (2015), 10, S. 7209113, insges. 13 S.

http://dx.doi.org/10.1109/TMAG.2015.2448519
Weise, Konstantin; Schmidt, Reinhard; Carlstedt, Matthias; Ziolkowski, Marek; Brauer, Hartmut; Töpfer, Hannes
Optimal magnet design for Lorentz force eddy-current testing. - In: IEEE transactions on magnetics : a publication of the IEEE Magnetics Society.. - New York, NY : IEEE, ISSN 1941-0069, Bd. 51 (2015), 9, S. 6201415, insges. 15 S.

We propose a procedure to determine optimal magnet systems in the framework of the nondestructive evaluation technique Lorentz force eddy-current testing (LET). The underlying optimization problem is clearly defined considering the problem specificity of nondestructive testing scenarios. The quantities involved are classified as design variables, and system and scaling parameters to provide a high level of generality. The objective function is defined as the absolute defect response signal (ADS) of the Lorentz force resulting from an inclusion inside the object under test. Associated constraints are defined according to the applied force sensor technology. A numerical procedure based on the finite-element method is proposed to evaluate the nonlinear objective and constraint functions, and the method of sequential quadratic programming is applied to determine unconstrained and constrained optimal magnet designs. Consequently, we propose a new magnet design based on the Halbach principle in combination with high saturation magnetization iron-cobalt alloys. The proposed magnet system outperforms currently available cylindrical magnets in terms of weight and performance. The corresponding defect response signal is increased up to 180% in the case of small defects located close to the surface of the specimen. The combination of active and passive magnetic materials provides an increase of the ADS by 15% compared with the magnet designs that are built solely from permanent magnet material. The proposed procedure provides a highly adaptive optimization strategy in the framework of LET and proposes new magnet systems with inherently improved characteristics.



http://dx.doi.org/10.1109/TMAG.2015.2427773
Zhang, Jianshu; Ho, Zuleita Ka Ming; Jorswieck, Eduard A.; Haardt, Martin
Interference neutralization for non-regenerative two-way relaying networks - part II: optimization. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 63 (2015), 17, S. 4557-4571

http://dx.doi.org/10.1109/TSP.2015.2446439
Zhang, Jianshu; Ho, Zuleita Ka Ming; Jorswieck, Eduard A.; Haardt, Martin
Interference neutralization for non-regenerative two-way relaying networks - part I: feasibility. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 63 (2015), 17, S. 4544-4556

http://dx.doi.org/10.1109/TSP.2015.2446445
Mengelkamp, Judith; Ziolkowski, Marek; Weise, Konstantin; Carlstedt, Matthias; Brauer, Hartmut; Haueisen, Jens
Permanent magnet modeling for lorentz force evaluation. - In: IEEE transactions on magnetics : a publication of the IEEE Magnetics Society.. - New York, NY : IEEE, ISSN 1941-0069, Bd. 51 (2015), 7, S. 6201211, insges. 11 S.

http://dx.doi.org/10.1109/TMAG.2015.2392082
Weise, Konstantin; Di Rienzo, Luca; Brauer, Hartmut; Haueisen, Jens; Töpfer, Hannes
Uncertainty analysis in transcranial magnetic stimulation using nonintrusive polynomial chaos expansion. - In: IEEE transactions on magnetics : a publication of the IEEE Magnetics Society.. - New York, NY : IEEE, ISSN 1941-0069, Bd. 51 (2015), 7, S. 5000408, insges. 8 S.

http://dx.doi.org/10.1109/TMAG.2015.2390593
Hager, Markus; Seitz, Jochen; Waas, Thomas
Literature survey on recent progress in inter-vehicle communication simulations. - In: Journal of Transportation Technologies : JTTs.. - Irvine, Calif. : Scientific Research Publ. Inc., ISSN 2160-0481, Bd. 5 (2015), 3, S. 159-168

http://dx.doi.org/10.4236/jtts.2015.53015
Kowalczyk, Konrad; Thiergart, Oliver; Taseska, Maja; Del Galdo, Giovanni; Pulkki, Ville; Habets, Emanuel A. P.;
Parametric spatial sound processing : a flexible and efficient solution to sound scene acquisition, modification, and reproduction. - In: IEEE signal processing magazine : a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 32 (2015), 2, S. 31-42

https://doi.org/10.1109/MSP.2014.2369531
Sharma, Rajesh K.; Rawat, Danda B.
Advances on security threats and countermeasures for cognitive radio networks: a survey. - In: IEEE communications surveys & tutorials : the electronic magazine of original peer-reviewed survey articles.. - New York, NY : IEEE Communications Soc., Bd. 17 (2015), 2, S. 1023-1043

http://dx.doi.org/10.1109/COMST.2014.2380998
Haddad, Taghrid; Engert, Sonja; Brandel, Oliver; Kunert, Jürgen; Stolz, Ronny; Töpfer, Hannes; Ortlepp, Thomas
Experimental analysis of the bias dependent sensitivity of a Josephson comparator. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 25 (2015), 3, S. 1301804, insges. 4 S.

The Josephson comparator is one of the building blocks of superconductor electronics. It is used as a decision element in all analog and digital circuits. For fast high-bandwidth analog-to-digital converters as well as for digital circuits with reduced switching energy its high sensitivity is most important. Thermal noise limits its decision uncertainty. In this work we analyze the influence of the bias current on the gray zone of a Josephson comparator. Circuit simulations are compared against experimental data. The experimental analysis shows a characteristic dependence of the gray zone on the bias current. We can identify a clear minimum value. This point is related to a certain clock frequency. At low frequencies the simulated relationship between the gray zone and the bias current is in very good agreement with experimental results. The comparison confirmed the circuit model and enables to adjust the design to certain applications to realize the best trade-off between clock frequency and grey zone. The article describes the experimental validation procedure and a derived normalized dependency in detail.



http://dx.doi.org/10.1109/TASC.2015.2389764
Rieche, Marie; Ihlow, Alexander; Arndt, Daniel; Pérez-Fontán, Fernando; Del Galdo, Giovanni;
Modeling of the Land Mobile Satellite channel considering the terminal's driving direction. - In: International journal of antennas and propagation : IJAP.. - New York, NY : Hindawi, ISSN 1687-5877, Bd. 2015 (2015), Article ID 372124, insges. 21 S.

http://dx.doi.org/10.1155/2015/372124
Yeryomin, Yevgeniy; Seitz, Jochen
Framework for flexible multi-metric path selection for next generation network. - In: Journal of Advances in Computer Networks : JACN.. - Singapore : International Association of Computer Science and Information Technology Press (IACSIT), ISSN 1793-8244, Bd. 3 (2015), 1, S. 42-48

http://dx.doi.org/10.7763/JACN.2015.V3.140
Sachs, Jürgen; Herrmann, Ralf
M-sequence-based ultra-wideband sensor network for vitality monitoring of elders at home. - In: IET radar, sonar & navigation. - London : The Institution of Engineering and Technology, ISSN 1751-8792, Bd. 9 (2015), 2, S. 125-137

http://dx.doi.org/10.1049/iet-rsn.2014.0214
Irteza, Safwat; Schäfer, Erik; Stephan, Ralf; Hornbostel, Achim; Hein, Matthias A.;
Compact antenna array receiver for robust satellite navigation systems. - In: International journal of microwave and wireless technologies. - Cambridge : Cambridge Univ. Press, ISSN 1759-0795, Bd. 7 (2015), 6, S. 735-745

http://dx.doi.org/10.1017/S1759078714000907
Zhang, Jianshu; Haardt, Martin
Energy efficient two-way non-regenerative relaying for relays with multiple antennas. - In: IEEE signal processing letters : a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, ISSN 1558-2361, Bd. 22 (2015), 8, S. 1079-1083

http://dx.doi.org/10.1109/LSP.2014.2386310
Schulz, Dominik; Thomä, Reiner S.
Quaternion-based polarimetric array manifold interpolation. - In: Signal processing : a European journal devoted to the methods and applications of signal processing.. - Amsterdam [u.a.] : Elsevier, Bd. 108 (2015), S. 245-258

http://dx.doi.org/10.1016/j.sigpro.2014.09.017
Juhas, Anamarija; Pekari´c-Naџ, Neda; Töpfer, Hannes;
Magnetic field of rectangular current loop with sides parallel and perpendicular to the surface of high-permeability material. - In: Serbian journal of electrical engineering. - Čačak : Univ., ISSN 2217-7183, Bd. 11 (2014), 4, S. 701-717

https://doi.org/10.2298/SJEE1404701J
Brauer, Hartmut; Ziolkowski, Marek; Töpfer, Hannes;
Defect detection in conducting materials using eddy current testing techniques. - In: Serbian journal of electrical engineering. - Čačak : Univ., ISSN 2217-7183, Bd. 11 (2014), 4, S. 535-549

https://doi.org/10.2298/SJEE1404535B
Hasan, Mais; Golle, Robbi; Debes, Maik; Seitz, Jochen; Lewandowska, Agnieszka
Peer-to-peer collaboration in PeCoCC framework. - In: International journal on advances in networks and services. - [S.l.] : IARIA, ISSN 1942-2644, Bd. 7 (2014), 3/4, S. 148-162

http://www.db-thueringen.de/servlets/DocumentServlet?id=25511
Degli-Esposti, Vittorio; Fuschini, Franco; Vitucci, Enrico M.; Barbiroli, Marina; Zoli, Marco; Tian, Li; Yin, Xuefeng; Dupleich, Diego; Müller, Robert; Schneider, Christian; Thomä, Reiner;
Ray-tracing-based mm-wave beamforming assessment. - In: IEEE access : practical research, open solutions.. - New York, NY : IEEE, ISSN 2169-3536, Bd. 2 (2014), S. 1314-1325

https://doi.org/10.1109/ACCESS.2014.2365991
Zu, Keke; Lamare, Rodrigo C.; Haardt, Martin
Multi-branch Tomlinson-Harashima precoding design for MU-MIMO systems: theory and algorithms. - In: IEEE transactions on communications : a publication of the IEEE Communications Society.. - New York, NY : IEEE, ISSN 1558-0857, Bd. 62 (2014), 3, S. 939-951

http://dx.doi.org/10.1109/TCOMM.2014.012514.130241
Wang, Lei; Lamare, Rodrigo C.; Haardt, Martin
Direction finding algorithms based on joint iterative subspace optimization. - In: IEEE transactions on aerospace and electronic systems : AES.. - New York, NY : IEEE, ISSN 1557-9603, Bd. 50 (2014), 4, S. 2541-2553

http://dx.doi.org/10.1109/TAES.2014.120395
Weise, Konstantin; Brauer, Hartmut; Töpfer, Hannes;
The electric field induced by transcranial magnetic stimulation: a comparison between analytic and FEM solutions. - In: Serbian journal of electrical engineering. - Čačak : Univ., ISSN 2217-7183, Bd. 11 (2014), 3, S. 403-418

https://doi.org/10.2298/SJEE140908029P
Zetik, Rudolf; Kmec, Martin; Sachs, Jürgen; Thomä, Reiner S.;
Real-time MIMO channel sounder for emulation of distributed ultrawideband systems. - In: International journal of antennas and propagation : IJAP.. - New York, NY : Hindawi, ISSN 1687-5877, Bd. 2014 (2014), Article ID 317683, insges. 16 S.

http://dx.doi.org/10.1155/2014/317683
Steinwandt, Jens; Römer, Florian; Haardt, Martin; Del Galdo, Giovanni
R-dimensional ESPRIT-type algorithms for strictly second-order non-circular sources and their performance analysis. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 62 (2014), 18, S. 4824-4838

http://dx.doi.org/10.1109/TSP.2014.2342673
Cheng, Yao; Römer, Florian; Khatib, Olaa; Haardt, Martin
Tensor subspace Tracking via Kronecker structured projections (TeTraKron) for time-varying multidimensional harmonic retrieval. - In: EURASIP journal on advances in signal processing. - Heidelberg : Springer, ISSN 1687-6180, (2014), 123, insges. 14 S.

http://dx.doi.org/10.1186/1687-6180-2014-123
Brandel, Oliver; Kunert, Jürgen; May, Torsten; Ortlepp, Thomas; Töpfer, Hannes
Improved operating range of RSFQ-controlled current steering switches. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 24 (2014), 4, S. 2500106, insges. 6 S.

http://dx.doi.org/10.1109/TASC.2014.2318292
Cheng, Yao; Li, Peng; Haardt, Martin
Intrinsic interference mitigating coordinated beamforming for the FBMC/OQAM based downlink. - In: EURASIP journal on advances in signal processing. - Heidelberg : Springer, ISSN 1687-6180, (2014), 86, insges. 17 S.

http://dx.doi.org/10.1186/1687-6180-2014-86
Burkhardt, Frank; Eberlein, Ernst; Jaeckel, Stephan; Sommerkorn, Gerd; Prieto-Cerdeira, Roberto;
MIMOSA - a dual approach to detailed land mobile satellite channel modeling. - In: International journal of satellite communications and networking. - New York, NY [u.a.] : Wiley, ISSN 1542-0981, Bd. 32 (2014), 4, S. 309-328

https://doi.org/10.1002/sat.1045
Becker, Hanna; Albera, Laurent; Comon, Pierre; Haardt, Martin; Birot, G.; Wendling, F.; Gavaret, M.; Bénar, C. G.; Merlet, Isabelle
EEG extended source localization: tensor-based vs. conventional methods. - In: NeuroImage : a journal of brain function.. - Orlando, Fla. : Academic Press, ISSN 1095-9572, Bd. 96 (2014), S. 143-157

http://dx.doi.org/10.1016/j.neuroimage.2014.03.043
Tronc, Jérôme; Angeletti, Piero; Song, Nuan; Haardt, Martin; Arendt, Johannes; Gallinaro, Gennaro;
Overview and comparison of on-ground and on-board beamforming techniques in mobile satellite service applications. - In: International journal of satellite communications and networking. - New York, NY [u.a.] : Wiley, ISSN 1542-0981, Bd. 32 (2014), 4, S. 291-308

https://doi.org/10.1002/sat.1049
Landau, Lukas; Lamare, Rodrigo C.; Haardt, Martin
Robust adaptive beamforming algorithms using the constrained constant modulus criterion. - In: IET signal processing. - London : IET, ISSN 1751-9683, Bd. 8 (2014), 5, S. 447-457

http://dx.doi.org/10.1049/iet-spr.2013.0166
Römer, Florian; Haardt, Martin; Del Galdo, Giovanni
Analytical performance assessment of multi-dimensional matrix- and tensor-based ESPRIT-type algorithms. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 62 (2014), 10, S. 2611-2625

http://dx.doi.org/10.1109/TSP.2014.2313530
Schmähling, Franko; Wübbeler, Gerd; Lopez, Marco; Gassmann, Frank; Krüger, Udo; Schmidt, Franz; Sperling, Armin; Elster, Clemens
Virtual experiment for near-field goniophotometric measurements. - In: Applied optics. - Washington, DC : Optical Soc. of America, ISSN 2155-3165, Bd. 53 (2014), 7, S. 1481-1487

http://dx.doi.org/10.1364/AO.53.001481
Li, Sheng; Cheng, Yao; Zhang, Jianshu; Römer, Florian; Song, Bin; Haardt, Martin; Zhou, Yuan; Dong, Mingjie
An efficient and flexible transmission strategy for the multi-carrier multi-user MIMO downlink. - In: IEEE transactions on vehicular technology : a publication of the IEEE Vehicular Technology Society.. - New York, NY : IEEE, ISSN 1939-9359, Bd. 63 (2014), 2, S. 628-642

http://dx.doi.org/10.1109/TVT.2013.2280951
Song, Nuan; Alokozai, Waheed Ullah; Lamare, Rodrigo C.; Haardt, Martin
Adaptive widely linear reduced-rank beamforming based on joint iterative optimization. - In: IEEE signal processing letters : a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, ISSN 1558-2361, Bd. 21 (2014), 3, S. 265-269

http://dx.doi.org/10.1109/LSP.2013.2295943
Grimm, Michael; Allén, Markus; Marttila, Jaakko; Valkama, Mikko; Thomä, Reiner
Joint mitigation of nonlinear RF and baseband distortions in wideband direct-conversion receivers. - In: IEEE transactions on microwave theory and techniques : MTT ; a publication of the IEEE Microwave Theory and Techniques Society.. - New York, NY : IEEE, Bd. 62 (2014), 1, S. 166-182

http://dx.doi.org/10.1109/TMTT.2013.2292603
Sachs, Jürgen; Helbig, Marko; Herrmann, Ralf; Kmec, Martin; Schilling, Kai; Zaikov, Egor
Remote vital sign detection for rescue, security, and medical care by ultra-wideband pseudo-noise radar. - In: Ad hoc Networks. - Amsterdam [u.a.] : Elsevier Science, ISSN 1570-8705, Bd. 13.2014, Part A, S. 42-53

http://dx.doi.org/10.1016/j.adhoc.2012.07.002
Hager, Markus; Finke, Thomas; Seitz, Jochen; Waas, Thomas
Software-based management for ethernet networks. - In: Wireless personal communications : an international journal.. - Dordrecht [u.a.] : Springer Science + Business Media B.V, ISSN 1572-834X, Bd. 74 (2014), 3, S. 1021-1032

http://dx.doi.org/10.1007/s11277-013-1341-3
Garcia Ariza, Alexis Paolo; Müller, Robert; Wollenschläger, Frank; Schulz, Alexander; Elkhouly, Mohamed; Sun, Yaoming; Glisic, Srdjan; Trautwein, Uwe; Stephan, Ralf; Müller, Jens
60 GHz ultrawideband polarimetric MIMO sensing for wireless multi-gigabit and radar. - In: IEEE transactions on antennas and propagation : a publication of the IEEE Antennas and Propagation Society.. - New York, NY : IEEE, ISSN 0018-926X, Bd. 61 (2013), 4, S. 1631-1641

http://dx.doi.org/10.1109/TAP.2013.2243398
Serebryakova, Elena; Blau, Kurt; Hein, Matthias A.
Influence of the reconstruction filter on the performance of a switched-mode power amplifier. - In: Facta Universitatis. Series Electronics and energetics / Univerzitet u Nišu. - Niš : Univ., 1993- , ISSN: 2217-5997 , ZDB-ID: 2629094-7, ISSN 2217-5997, Bd. 26 (2013), 1, S. 1-10

http://dx.doi.org/10.2298/FUEE1301001S
Murtaza, Noman; Sharma, Rajesh K.; Thomä, Reiner S.; Hein, Matthias A.;
Directional antennas for cognitive radio: analysis and design recommendations. - In: Progress in electromagnetics research : PIER.. - Cambridge, Mass. : EMW, ISSN 1559-8985, Bd. 140 (2013), S. 1-30

http://dx.doi.org/10.2528/PIER13031107
Bliem, Tobias; Del Galdo, Giovanni; Borsum, Juliane; Craciun, Alexandra; Zitzmann, Reinhard
A robust audio watermarking system for acoustic channels. - In: Journal of the Audio Engineering Society. - New York, NY : AES, ISSN 1549-4950, Bd. 61 (2013), 11, S. 878-888

Zu, Keke; Lamare, Rodrigo C.; Haardt, Martin
Generalized design of low-complexity block diagonalization type precoding algorithms for multiuser MIMO systems. - In: IEEE transactions on communications : a publication of the IEEE Communications Society.. - New York, NY : IEEE, ISSN 1558-0857, Bd. 61 (2013), 10, S. 4232-4242

http://dx.doi.org/10.1109/TCOMM.2013.090513.130038
Crowther, L. J.; Porzig, Konstantin; Hadimani, R. L.; Brauer, Hartmut; Jiles, D. C.
Realistically modeled transcranial magnetic stimulation coils for Lorentz force and stress calculations during MRI. - In: IEEE transactions on magnetics : a publication of the IEEE Magnetics Society.. - New York, NY : IEEE, ISSN 1941-0069, Bd. 49 (2013), 7, S. 3426-3429

http://dx.doi.org/10.1109/TMAG.2013.2247578
Wetzstein, Olaf; Müller, Marcus; Pacholik, Alexander; Ortlepp, Thomas; Fengler, Wolfgang; Meyer, Hans-Georg; Töpfer, Hannes
Event-based modeling of rapid single-flux quantum basic cells with timing jitter. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 23 (2013), 5, S. 1301707, insges. 7 S.

http://dx.doi.org/10.1109/TASC.2013.2266403
Li, Sheng; Lamare, Rodrigo C.; Haardt, Martin
Adaptive frequency-domain group-based shrinkage estimators for UWB systems. - In: IEEE transactions on vehicular technology : a publication of the IEEE Vehicular Technology Society.. - New York, NY : IEEE, ISSN 1939-9359, Bd. 62 (2013), 8, S. 3639-3652

http://dx.doi.org/10.1109/TVT.2013.2259603
Ispas, Adrian; Gong, Xitao; Schneider, Christian; Ascheid, Gerd; Thomä, Reiner
Dual-polarized Ricean MIMO channels: modeling and performance assessment. - In: IEEE transactions on communications : a publication of the IEEE Communications Society.. - New York, NY : IEEE, ISSN 1558-0857, Bd. 61 (2013), 10, S. 4218-4231

http://dx.doi.org/10.1109/TCOMM.2013.082813.120976
Eberlein, Ernst; Burkhardt, Frank; Sommerkorn, Gerd; Jaeckel, Stephan; Prieto-Cerdeira, Roberto
MIMOSA - analysis of the MIMO channel for LMS systems. - In: Space communications : an international journal.. - Amsterdam : Elsevier, ISSN 1875-9211, Bd. 22 (2013), 2/4, S. 145-158

http://dx.doi.org/10.3233/SC-130010
Sharma, Rajesh Kumar; Kotterman, Wim; Landmann, Markus; Schirmer, Christopher; Schneider, Christian; Wollenschläger, Frank; Del Galdo, Giovanni; Hein, Matthias; Thomä, Reiner;
Over-the-air testing of cognitive radio nodes in a virtual electromagnetic environment. - In: International journal of antennas and propagation : IJAP.. - New York, NY : Hindawi, ISSN 1687-5877, Bd. 2013 (2013), Article ID 945283, insges. 16 S.

http://dx.doi.org/10.1155/2013/945283
Hager, Markus; Schellenberg, Sebastian; Seitz, Jochen; Mann, Sebastian; Schorcht, Gunar;
A framework for smart home services with secure and QoS-aware communications. - In: International Journal of Advances in Telecommunications, Electrotechnics, Signals and Systems. - Brno, ISSN 1805-5443, Bd. 2 (2013), 1, S. 9-17

http://dx.doi.org/10.11601/ijates.v2i1.14
Zec, Mladen; Uhlig, Robert P.; Ziolkowski, Marek; Brauer, Hartmut
Finite element analysis of nondestructive testing eddy current problems with moving parts. - In: IEEE transactions on magnetics : a publication of the IEEE Magnetics Society.. - New York, NY : IEEE, ISSN 1941-0069, Bd. 49.2013, 8, Part 2, S. 4785-4794

http://dx.doi.org/10.1109/TMAG.2013.2242899
Liu, Kefei; So, Hing Cheung; Costa, João Paulo Carvalho Lustosa; Römer, Florian; Huang, Lei;
Efficient source enumeration for accurate direction-of-arrival estimation in threshold region. - In: Digital signal processing : a review journal.. - Orlando, Fla. : Academic Press, ISSN 1051-2004, Bd. 23 (2013), 5, S. 1668-1677

http://dx.doi.org/10.1016/j.dsp.2013.06.009
Rentsch, Sven; Müller, Jens; Hein, Matthias
Tunability, frequency, and temperature behavior of cofired LTCC-integrated barium-strontium-titanate shunt capacitors up to 8 GHz. - In: Journal of microelectronics and electronic packaging. - Washington, DC : IMAPS, ISSN 1551-4897, Bd. 10 (2013), 1, S. 23-29

Gao, Jie; Vorobyov, Sergiy A.; Jiang, Hai; Zhang, Jianshu; Haardt, Martin
Sum-rate maximization with minimum power consumption for MIMO DF two-way relaying - part II: network optimization. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 61 (2013), 14, S. 3578-3591

http://dx.doi.org/10.1109/TSP.2013.2263501
Gao, Jie; Vorobyov, Sergiy A.; Jiang, Hai; Zhang, Jianshu; Haardt, Martin
Sum-rate maximization with minimum power consumption for MIMO DF two-way relaying - part I: relay optimization. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 61 (2013), 14, S. 3563-3577

http://dx.doi.org/10.1109/TSP.2013.2262277
Kunert, Jürgen; Brandel, Oliver; Linzen, Sven; Wetzstein, Olaf; Töpfer, Hannes; Ortlepp, Thomas; Meyer, Hans-Georg
Recent developments in superconductor digital electronics technology at FLUXONICS foundry. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 23 (2013), 5, S. 1101707, insges. 7 S.

http://dx.doi.org/10.1109/TASC.2013.2265496
Petkovi´c, Bojana; Haueisen, Jens; Zec, Mladen; Uhlig, Robert Peter; Brauer, Hartmut; Ziolkowski, Marek;
Lorentz force evaluation: a new approximation method for defect reconstruction. - In: NDT & E international : independent nondestructive testing and evaluation.. - Amsterdam [u.a.] : Elsevier Science, Bd. 59 (2013), S. 57-67

https://doi.org/10.1016/j.ndteint.2013.05.005
Costa, João Paulo C. L.; Liu, Kefei; So, Hing Cheung; Schwarz, Stefanie; Haardt, Martin; Römer, Florian
Multidimensional prewhitening for enhanced signal reconstruction and parameter estimation in colored noise with Kronecker correlation structure. - In: Signal processing : a European journal devoted to the methods and applications of signal processing.. - Amsterdam [u.a.] : Elsevier, Bd. 93 (2013), 11, S. 3209-3226

http://dx.doi.org/10.1016/j.sigpro.2013.04.010
Narandži´c, Milan; Schneider, Christian; Kotterman, Wim; Thomä, Reiner;
Quantification of scenario distance within generic WINNER channel model. - In: International journal of antennas and propagation : IJAP.. - New York, NY : Hindawi, ISSN 1687-5877, Bd. 2013 (2013), Article ID 176704, insges. 17 S.

http://dx.doi.org/10.1155/2013/176704
Schulz, Alexander; Xia, Lei; Müller, Jens; Rentsch, Sven; Müller, Robert
A low-loss fully embedded stripline parallel coupled BPF for applications using the 60 GHz band. - In: International journal of applied ceramic technology. - Westerville, Ohio : Wiley-Blackwell, ISSN 1744-7402, Bd. 10 (2013), 2, S. 307-312

http://dx.doi.org/10.1111/j.1744-7402.2011.02738.x
Miyajima, Shigeyuki; Ortlepp, Thomas; Töpfer, Hannes; Bozbey, Ali; Fujimaki, Akira
Experimental demonstration and numerical analysis of microampere gray zone width with enhanced operating margin in shunted quasi-one junction superconducting quantum interference device comparators. - In: Japanese journal of applied physics : JJAP.. - Bristol : IOP Publ., ISSN 1347-4065, Bd. 52.2013, 3R, S. 033101, insges. 5 S.

We evaluated the relationship between the gray zone width and the operating margin for comparators composed of quasi-one-junction superconducting quantum interference devices (QOSs) with shunt resistors, which are often used as high-speed readout circuits in multiple superconductor detector systems. The gray zone width is a good measure of current sensitivity of a single-bit comparator. We numerically analyzed the gray zone width of a QOS comparator and determined the circuit parameters. The gray zone width obtained from the experiments concurred with the results of the numerical analys is and was 2-3 [my]A at 4.2 K in a QOS comparator composed of three Nb/AlOx/Nb junctions with critical currents of less than 90 [my]A. The experimentally obtained operating margin for the bias current provided to the comparator was +-15% at the bias current of around 140 [my]A. These results show that QOS comparators are promising for readout circuits operating up to tens of GHz and imply that gray zone width is the thermal noise in the resistors at 4.2 K.



http://dx.doi.org/10.7567/JJAP.52.033101
Römer, Florian; Haardt, Martin
A semi-algebraic framework for approximate CP decompositions via simultaneous matrix diagonalizations (SECSI). - In: Signal processing : a European journal devoted to the methods and applications of signal processing.. - Amsterdam [u.a.] : Elsevier, Bd. 93 (2013), 9, S. 2722-2738

http://dx.doi.org/10.1016/j.sigpro.2013.02.016
Song, Bin; Römer, Florian; Haardt, Martin
Flexible coordinated beamforming (FlexCoBF) for the downlink of multi-user MIMO systems in single and clustered multiple cells. - In: Signal processing : a European journal devoted to the methods and applications of signal processing.. - Amsterdam [u.a.] : Elsevier, Bd. 93 (2013), 9, S. 2462-2473

http://dx.doi.org/10.1016/j.sigpro.2013.03.012
Liu, Kefei; Costa, João Paulo Carvalho Lustosa; So, Hing Cheung; Römer, Florian; Haardt, Martin; Gadêlha, Luiz F.;
3-D unitary ESPRIT: accurate attitude estimation for unmanned aerial vehicles with a hexagon-shaped ESPAR array. - In: Digital signal processing : a review journal.. - Orlando, Fla. : Academic Press, ISSN 1051-2004, Bd. 23 (2013), 3, S. 701-711

http://dx.doi.org/10.1016/j.dsp.2012.12.010
Engert, Sonja; Wetzstein, Olaf; Hofherr, Matthias; Ilin, Konstantin; Siegel, Michael; Meyer, Hans-Georg; Töpfer, Hannes
Mathematical analysis of multiplexing techniques for SNSPD arrays. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 23.2013, 3, Pt. 1, 2501005, insges. 5 S.

http://dx.doi.org/10.1109/TASC.2013.2247455
Fourie, Coenrad J.; Wetzstein, Olaf; Kunert, Jürgen; Töpfer, Hannes; Meyer, Hans-Georg
Experimentally verified inductance extraction and parameter study for superconductive integrated circuit wires crossing ground plane holes. - In: Superconductor science and technology : a multidisciplinary forum for workers involved in any aspect of the science and technology of superconductors.. - Bristol : IOP Publ., ISSN 1361-6668, Bd. 26 (2013), 1, S. 015016, insges. 8 S.

As the complexity of rapid single flux quantum (RSFQ) circuits increases, both current and power consumption of the circuits become important design criteria. Various new concepts such as inductive biasing for energy efficient RSFQ circuits and inductively coupled RSFQ cells for current recycling have been proposed to overcome increasingly severe design problems. Both of these techniques use ground plane holes to increase the inductance or coupling factor of superconducting integrated circuit wires. New design tools are consequently required to handle the new topographies. One important issue in such circuit design is the accurate calculation of networks of inductances even in the presence of finite holes in the ground plane. We show how a fast network extraction method using InductEx, which is a pre- and post-processor for the magnetoquasistatic field solver FastHenry, is used to calculate the inductances of a set of SQUIDs (superconducting quantum interference devices) with ground plane holes of different sizes. The results are compared to measurements of physical structures fabricated with the IPHT Jena 1 kA cm2 RSFQ niobium process to verify accuracy. We th practical circuits and show excellent accuracy.



http://dx.doi.org/10.1088/0953-2048/26/1/015016
Steinwandt, Jens; Lamare, Rodrigo C.; ,
Beamspace direction finding based on the conjugate gradient and the auxiliary vector filtering algorithms. - In: Signal processing : a European journal devoted to the methods and applications of signal processing.. - Amsterdam [u.a.] : Elsevier, Bd. 93 (2013), 4, S. 641-651

http://dx.doi.org/10.1016/j.sigpro.2012.09.001
Yan, Honghui; Shen, Guowei; Zetik, Rudolf; Hirsch, Ole; Thomä, Reiner S.
Ultra-wideband MIMO ambiguity function and its factorability. - In: IEEE transactions on geoscience and remote sensing : a publication of the IEEE Geoscience and Remote Sensing Society.. - New York, NY : IEEE, Bd. 51 (2013), 1, S. 504-519

http://dx.doi.org/10.1109/TGRS.2012.2201486
Ahonen, Jukka; Del Galdo, Giovanni; Kuech, Fabian; Pulkki, Ville
Directional analysis with microphone array mounted on rigid cylinder for directional audio coding. - In: Journal of the Audio Engineering Society. - New York, NY : AES, ISSN 1549-4950, Bd. 60 (2012), 5, S. 311-324

Crowther, L. J.; Porzig, Konstantin; Hadimani, R. L.; Brauer, Hartmut; Jiles, D. C.
Calculation of Lorentz forces on coils for transcranial magnetic stimulation during magnetic resonance imaging. - In: IEEE transactions on magnetics : a publication of the IEEE Magnetics Society.. - New York, NY : IEEE, ISSN 1941-0069, Bd. 48 (2012), 11, S. 4058-4061

http://dx.doi.org/10.1109/TMAG.2012.2202888
Humbla, Stefan; Kaleem, Saqib; Müller, Jens; Rentsch, Sven; Stephan, Ralf; Stöpel, Dirk; Vogt, Gabor; Hein, Matthias
On-orbit verification of a 4 × 4 switch matrix for space applications based on the low temperature co-fired ceramics technology. - In: Frequenz : journal of RF-engineering and telecommunications.. - Berlin : De Gruyter, ISSN 2191-6349, Bd. 66 (2012), 11/12, S. 355-362

http://dx.doi.org/10.1515/freq-2012-0106
Kaleem, Saqib; Humbla, Stefan; Müller, Jens; Rentsch, Sven; Stöpel, Dirk; Hein, Matthias
Reconfigurable 4 × 4 switch matrix for Ka-band Geo-stationary satellite mission. - In: Frequenz : journal of RF-engineering and telecommunications.. - Berlin : De Gruyter, ISSN 2191-6349, Bd. 66 (2012), 11/12, S. 347-357

http://dx.doi.org/10.1515/freq-2012-0105
Helbig, Marko; Dahlke, Katja; Hilger, Ingrid; Kmec, Martin; Sachs, Jürgen
Design and test of an imaging system for UWB breast cancer detection. - In: Frequenz : journal of RF-engineering and telecommunications.. - Berlin : De Gruyter, ISSN 2191-6349, Bd. 66 (2012), 11/12, S. 387-394

http://dx.doi.org/10.1515/freq-2012-0103
Arndt, Daniel; Ihlow, Alexander; Heyn, Thomas; Heuberger, Albert; Prieto-Cerdeira, Roberto; Eberlein, Ernst;
State modelling of the land mobile propagation channel for dual-satellite systems. - In: EURASIP journal on wireless communications and networking : EURASIP JWCN.. - Heidelberg : Springer, ISSN 1687-1499, (2012), 228, insges. 21 S.

https://doi.org/10.1186/1687-1499-2012-228
Hofherr, Matthias; Wetzstein, Olaf; Engert, Sonja; Ortlepp, Thomas; Berg, Benjamin; Ilin, Konstantin; Henrich, Dagmar; Stolz, Ronny; Töpfer, Hannes; Meyer, Hans-Georg
Orthogonal sequencing multiplexer for superconducting nanowire single-photon detectors with RSFQ electronics readout circuit. - In: Optics express : the international electronic journal of optics.. - Washington, DC : Soc., ISSN 1094-4087, Bd. 20 (2012), 27, S. 28683-28697

We propose an efficient multiplexing technique for superconducting nanowire single-photon detectors based on an orthogonal detector bias switching method enabling the extraction of the average count rate of a set of detectors by one readout line. We implemented a system prototype where the SNSPDs are connected to an integrated cryogenic readout and a pulse merger system based on rapid single flux quantum (RSFQ) electronics. We discuss the general scalability of this concept, analyze the environmental requirements which define the resolvability and the accuracy and demonstrate the feasibility of this approach with experimental results for a SNSPD array with four pixels.



http://dx.doi.org/10.1364/OE.20.028683
Hähnlein, Bernd; Händel, Benjamin; Pezoldt, Jörg; Töpfer, Hannes; Granzner, Ralf; Schwierz, Frank
Side-gate graphene field-effect transistors with high transconductance. - In: Applied physics letters. - Melville, NY : American Inst. of Physics, ISSN 1077-3118, Bd. 101 (2012), 9, S. 093504, insges. 3 S.

We have fabricated epitaxial side-gate graphene field-effect transistors (FETs) with high transconductance. A side-gate graphene FET with 5560 nm2 active channel dimensions and a lateral gate-channel separation of 95 nm showing a high transconductance of 590 mS/mm is presented. An estimation of the electrostatic gate-channel capacitance of epitaxial side-gate graphene FETs shows that it is in the same order as the electrostatic gate capacitance of common top-gate graphene MOSFETs justifying the high transconductances of our devices. The results of the present paper demonstrate the potential of the side-gate architecture for graphene transistors.



http://dx.doi.org/10.1063/1.4748112
Arndt, Daniel; Ihlow, Alexander; Heuberger, Albert; Eberlein, Ernst;
State modelling of the land mobile propagation channel with multiple satellites. - In: International journal of antennas and propagation : IJAP.. - New York, NY : Hindawi, ISSN 1687-5877, Bd. 2012 (2012), Article ID 625374, insges. 15 S.

http://dx.doi.org/10.1155/2012/625374
Brandel, Oliver; Wetzstein, Olaf; May, Torsten; Töpfer, Hannes; Ortlepp, Thomas; Meyer, Hans-Georg
RSFQ electronics for controlling superconducting polarity switches. - In: Superconductor science and technology : a multidisciplinary forum for workers involved in any aspect of the science and technology of superconductors.. - Bristol : IOP Publ., ISSN 1361-6668, Bd. 25 (2012), 12, S. 125012, insges. 6 S.

Superconducting radiation sensors are of particular interest for imaging applications in the sub-mm wavelength band because of their extraordinary sensitivity. The rising number of sensors integrated in one array entails the requirement of multiplexing techniques in order to reduce the number of wires leading into the cryogenic stage and thus reduce the thermal losses. One kind of promising code division multiplexing technique is based on a current steering switch (CSS), which is composed of two identical superconducting quantum interference devices (SQUIDs) in parallel current paths. One of them is switched from the superconducting into the normal state controlled by the applied magnetic flux. In this way the signal path can be altered and they can act as a polarity switch for analogue signals. We pursue this concept to use rapid single flux quantum (RSFQ) electronics for controlling these switches. As a first step, the SQUIDs of the CSS are inductively coupled to the storing loops of two delay flip flops (DFFs). Thus, one is able to toggle the polarity of the analogue switch by controlling the state of the DFF by RSFQ control signals. The results of simulations and measurements and also margin analyses are discussed.



http://dx.doi.org/10.1088/0953-2048/25/12/125012
Minh, Hoa Le; O'Brien, Dominic; Faulkner, Grahame; Wolf, Mike
Bidirectional gigabit ethernet optical wireless communications system for home access networks. - In: IET Communications. - London : IET, ISSN 1751-8636, Bd. 6 (2012), 11, S. 1529-1536

http://dx.doi.org/10.1049/iet-com.2011.0322
Krjuger, Udo; Ruggaber, Bendżamin; Šmidt, Franc
Spektralьnye charakteristiki jarkomerov na PZS s u&bovko;cetom spektralьnych ko&ptbov;efficientov propuskanija svetofilьtrov. - In: Svetotechnika. - Moskva : Gos&ptbov;energoizdat, ISSN 0039-7067, (2012), 1, S. 46-50

Krüger, Udo; Ruggaber, Benjamin; Schmidt, Franz
Spectral properties of imaging luminance measuring devices considering the angular dependence of the spectral transmission of filters. - In: Light & engineering. - Moscow : Znack Publ. House, ISSN 0236-2945, Bd. 20 (2012), 2, S. 72-77

The spectral matching of image luminance measuring devices (ILMD) is influenced by angular relationships at the object and the image side of the lens. To design the filters for spectral matching for ILMD, it is necessary to take this information into account. Here the influence of the angular relationship to be the spectral transmission of the filters has to be estimated. The impact of these relations to the spectral matching of ILMDs is explained.



Grimm, Michael; Sharma, Rajesh Kumar; Hein, Matthias A.; Thomä, Reiner S.
DSP-based mitigation of RF front-end non-linearity in cognitive wideband receivers. - In: Frequenz : journal of RF-engineering and telecommunications.. - Berlin : De Gruyter, ISSN 2191-6349, Bd. 66 (2012), 9/10, S. 303-310

http://dx.doi.org/10.1515/freq-2012-0052
Ortlepp, Thomas; Miyajima, S.; Töpfer, Hannes; Fujimaki, A.
Josephson comparator with modified dynamic behavior for improved sensitivity. - In: Journal of applied physics : AIP's archival journal for significant new results in applied physics.. - Melville, NY : American Inst. of Physics, ISSN 1089-7550, Bd. 111 (2012), 12, S. 123901, insges. 5 S.

The decision of a Josephson comparator is influenced by thermal noise which is limiting the practical sensitivity in many applications of superconductor electronics. We analyzed the Gaussian state distribution theoretically and identified the most effective way to improve the practical sensitivity of a Josephson comparator. We suggest a modified damping concept and demonstrate a gray zone width as low as 840 nA experimentally. This value is about ten times smaller than for conventional Josephson comparators and very close to the theoretical limit at liquid helium temperature.



http://dx.doi.org/10.1063/1.4729075
Khabbazibasmenj, Arash; Römer, Florian; Vorobyov, Sergiy A.; Haardt, Martin
Sum-rate maximization in two-way AF MIMO relaying: polynomial time solutions to a class of DC programming problems. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 60 (2012), 10, S. 5478-5493

http://dx.doi.org/10.1109/TSP.2012.2208635
Krüger, Udo; Porsch, Tobias; Schmidt, Franz; Walkling, Andreas
Quantitative Blendungsbewertung : Blendungskennzahlen mit bildauflösender Leuchtdichtemesstechnik. - In: Licht. - München : Pflaum, ISSN 0024-2861, Bd. 64 (2012), 7/8, S. 64-67

Die Blendung ist ein wichtiges Gütemerkmal in der Außenbeleuchtung, die deshalb zu bewerten und zu minimieren ist. Zur Bewertung stehen verschiedene Kennzahlen zur Verfügung, die nur aufwändig mit konventioneller Messtechnik in der Praxis erfasst werden können. Mit bildauflösender Leuchtdichtemesstechnik kann hingegen dieser Messprozess vereinfacht werden. Der Artikel zeigt am Beispiel der Lichtimmission, wie dadurch beispielsweise das Blendmaß ks einfach und ausreichend genau bestimmt werden kann. Weitere Kennzahlen könnten bildaufgelöst gemessen werden, womit aber eine entsprechende Überarbeitung der Normen einhergehen müsste.



Song, Nuan; Lamare, Rodrigo C.; Haardt, Martin; Wolf, Mike
Adaptive widely linear reduced-rank interference suppression based on the multistage Wiener filter. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 60 (2012), 8, S. 4003-4016

http://dx.doi.org/10.1109/TSP.2012.2197747
Zhang, Jianshu; Römer, Florian; Haardt, Martin
Relay assisted physical resource sharing: projection based separation of multiple operators (ProBaSeMO) for two-way relaying with MIMO amplify and forward relays. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 60 (2012), 9, S. 4834-4848

http://dx.doi.org/10.1109/TSP.2012.2200888
Haverkamp, Imke; Wetzstein, Olaf; Kunert, Jürgen; Ortlepp, Thomas; Stolz, Ronny; Meyer, Hans-Georg; Töpfer, Hannes
Optimization of a digital SQUID magnetometer in terms of noise and distortion. - In: Superconductor science and technology : a multidisciplinary forum for workers involved in any aspect of the science and technology of superconductors.. - Bristol : IOP Publ., ISSN 1361-6668, Bd. 25 (2012), 6, S. 065012, insges. 8 S.

The digital SQUID magnetometer takes advantage of flux quantization in a superconducting loop in order to measure magnetic fields. The core element of the digital SQUID is a Josephson comparator with a superconducting antenna loop attached to one of its junctions. Evaluation of the circuit from the systems point of view requires an analysis in the frequency domain. In order to obtain a high-resolution fast Fourier transform, large datasets are necessary which are difficult to generate with transient simulation tools. In this work we derive a behavioural model for the digital SQUID in order to overcome restrictions imposed by transient simulation. By means of this model the influence of the comparator grey zone and the input loop inductance on the system performance was analysed. In order to assess the system, evaluation criteria based on the power spectral density were applied, which are commonly used for characterization of semiconductor analogue to digital converters. As a result of this study, design guidelines for an optimum antenna inductance depending on the comparator grey zone are derived, allowing us to achieve an optimum system performance in terms of noise and distortion.



http://dx.doi.org/10.1088/0953-2048/25/6/065012
Yeredor, Arie; Song, Bin; Römer, Florian; Haardt, Martin
A "sequentially drilled" joint congruence (SeDJoCo) transformation with applications in blind source separation and multiuser MIMO systems. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 60 (2012), 6, S. 2744-2757

http://dx.doi.org/10.1109/TSP.2012.2190728
O'Brien, Dominic; Turnbull, Ross; Le Minh, Hoa; Faulkner, Grahame; Bouchet, Olivier; Porcon, Pascal; El Tabach, Mamdouh; Gueutier, Eric; Wolf, Mike; Grobe, Liane; Li, Jianhui;
High-speed optical wireless demonstrators: conclusions and future directions. - In: Journal of lightwave technology : LT ; JLT ; a joint IEEE-OSA publication.. - Washington, DC : OSA, ISSN 0733-8724, Bd. 30 (2012), 13, S. 2181-2187

https://doi.org/10.1109/JLT.2012.2193874
Uhlig, Robert P.; Zec, Mladen; Ziolkowski, Marek; Brauer, Hartmut; Thess, André
Lorentz force sigmometry: a contactless method for electrical conductivity measurements. - In: Journal of applied physics : AIP's archival journal for significant new results in applied physics.. - Melville, NY : American Inst. of Physics, ISSN 1089-7550, Bd. 111 (2012), 9, S. 094914, insges. 7 S.

http://dx.doi.org/10.1063/1.4716005
Landmann, Markus; , ; ,
Impact of incomplete and inaccurate data models on high resolution parameter estimation in multidimensional channel sounding. - In: IEEE transactions on antennas and propagation : a publication of the IEEE Antennas and Propagation Society.. - New York, NY : IEEE, ISSN 0018-926X, Bd. 60 (2012), 2, S. 557-573

http://dx.doi.org/10.1109/TAP.2011.2173446
Becker, Hanna; Comon, Pierre; Albera, Laurent; Haardt, Martin; Merlet, Isabelle
Multi-way space-time-wave-vector analysis for EEG source separation. - In: Signal processing : a European journal devoted to the methods and applications of signal processing.. - Amsterdam [u.a.] : Elsevier, Bd. 92 (2012), 4, S. 1021-1031

http://dx.doi.org/10.1016/j.sigpro.2011.10.014
Brauer, Hartmut; Ziolkowski, Marek; Porzig, Konstantin; Töpfer, Hannes
Modelling and simulation of a simple homopolar motor of Faraday's type. - In: Facta Universitatis. Series Electronics and energetics / Univerzitet u Nišu. - Niš : Univ., 1993- , ISSN: 2217-5997 , ZDB-ID: 2629094-7, ISSN 2217-5997, Bd. 24 (2011), 2, S. 221-242

During the application of simulation tools of computational electromagnetics it is sometimes difficult to decide whether the problems can be solved by the computation of electromagnetic fields or circuit simulation tools have to be applied additionally. The paper describes a typical situation in an electromagnetic CAD course, not only for beginners. The modelling and numerical simulation of a simple homopolar motor, similar to that what has been presented by Michael Faraday in 1821 firstly, was used as an example. To simulate the current flow in the permanent magnet the FEM software codes COMSOL Multiphysics including the integrated SPICE module and MAXWELL have been used. The correct simulation of the entire electric circuit as well as the precise modelling of the impressed current and of the electrode contacts turned out to be very important.



http://dx.doi.org/10.2298/FUEE1102221B
Zec, Mladen; Uhlig, Robert Peter; Ziolkowski, Marek; Brauer, Hartmut
Lorentz force eddy current testing: two-dimensional numerical study. - In: Prace Instytutu Elektrotechniki. - Warszawa : Inst. Elektrotechniki, ISSN 0032-6216, Bd. 58 (2011), 252, S. 55-66

Garcia Ariza, Alexis Paolo; Trautwein, Uwe; Müller, Robert; Wollenschläger, Frank; Thomä, Reiner S.; Kunisch, Jürgen; Torre, Itziar; Felbecker, Robert; Peter, Michael; Keusgen, Wilhelm
60 GHz short-range communications: channel measurements, analysis, and modeling. - In: International journal of microwave and wireless technologies. - Cambridge : Cambridge Univ. Press, ISSN 1759-0795, Bd. 3 (2011), 2, S. 201-211

http://dx.doi.org/10.1017/S1759078711000092
Martínez-Vázquez, Marta; Oikonomopoulos-Zachos, Christos; Maulwurf, Kai; Wollenschläger, Frank; Stephan, Ralf; Hein, Matthias A.; Xia, Lei; Müller, Jens; Estañ, Carlos; Dombrowski, Kai
Highly integrated antennas and front-ends for 60 GHz WLAN applications. - In: International journal of microwave and wireless technologies. - Cambridge : Cambridge Univ. Press, ISSN 1759-0795, Bd. 3 (2011), 2, S. 157-170

http://dx.doi.org/10.1017/S1759078711000298
Costa, João Paulo Carvalho Lustosa; Römer, Florian; Haardt, Martin; Sousa, Rafael Timóteo
Multi-dimensional model order selection. - In: EURASIP journal on advances in signal processing. - Heidelberg : Springer, ISSN 1687-6180, (2011), 26, insges. 13 S.

http://dx.doi.org/10.1186/1687-6180-2011-26
Garcia-Ariza, Alexis-Paolo; Rubio, Lorenzo
Computing the closest positive definite correlation matrix for experimental MIMO channel analysis. - In: IEEE communications letters. - New York, NY : IEEE, ISSN 1089-7798, Bd. 15 (2011), 10, S. 1038-1040

http://dx.doi.org/10.1109/LCOMM.2011.080811.102574
Lamare, Rodrigo C.; deHaardt, Martin; Joham, Michael; Le Ruyet, Didier; Love, David J.;
Recent advances in multiuser MIMO systems. - In: EURASIP journal on wireless communications and networking : EURASIP JWCN.. - Heidelberg : Springer, ISSN 1687-1499, (2011), 157, insges. 2 S.
- Editorial

https://doi.org/10.1186/1687-1499-2011-157
Nowak, Kai; Gross, Wolfgang; Nicksch, Kathrin; Hanusch, Christine; Helbig, Marko; Hohenberger, Peter; Gebhard, Martha M.; Schäfer, Michael
Intraoperative lung edema monitoring by microwave reflectometry. - In: Interactive cardiovascular and thoracic surgery : ICVTS.. - Oxford : Oxford Univ. Press, ISSN 1569-9285, Bd. 12 (2011), 4, S. 540-544

Microwave reflectometry might be a suitable tool for the thoracic surgeon to monitor edema formation of the lung during lung surgery. A new setup of microwave reflectometry for lung water measurements was developed and tested for clinical application. Three lung models were used for the microwave reflectometry tests: 1) the model of an ex vivo isolated perfused rat lung to investigate lung edema formation during ischemia-reperfusion (n=6), 2) the in situ lung of a human patient to demonstrate the feasibility of lung water monitoring during a surgical operation, 3) the model of an ex vivo isolated perfused human lung to investigate edema formation during postischemic reperfusion and to investigate the changes in water content in the region of a tumor. During human lung operation, significant changes in water content occurred in different lung areas. During isolated perfusion, a significant increase in lung water was measured in models 1) and 3) (P=0.03). Water content of tumor tissue was higher than in the surrounding healthy lung tissue. Microwave reflectometry offers a noninvasive approach to monitor lung edema formation in experimental models and during thoracic surgery.



http://dx.doi.org/10.1510/icvts.2010.243691
Uhlig, Robert Peter; Zec, Mladen; Ziolkowski, Marek; Brauer, Hartmut
Lorentz force eddy current testing: validation of numerical results. - In: Prace Instytutu Elektrotechniki. - Warszawa : Inst. Elektrotechniki, ISSN 0032-6216, Bd. 58 (2011), 251, S. 135-145

Ortlepp, Thomas; Hofherr, Matthias; Fritzsch, Ludwig; Engert, Sonja; Ilin, Konstantin; Rall, D.; Töpfer, Hannes; Meyer, Hans-Georg; Siegel, Michael
Demonstration of digital readout circuit for superconducting nanowire single photon detector. - In: Optics express : the international electronic journal of optics.. - Washington, DC : Soc., ISSN 1094-4087, Bd. 19 (2011), 19, S. 18593-18601

http://dx.doi.org/10.1364/OE.19.018593
Nacke, Thomas; Barthel, Andreas; Beckmann, Dieter; Pliquett, Uwe; Friedrich, Jürgen; Peyerl, Peter; Helbig, Marko; Sachs, Jürgen
Messsystem für die impedanzspektroskopische Breitband-Prozessmesstechnik. - In: Technisches Messen : tm ; Sensoren, Geräte, Systeme ; Organ des AMA Fachverbands für Sensorik e.V. und der NAMUR, Normenarbeitsgemeinschaft für Mess- und Regelungstechnik der Chemischen Industrie.. - Berlin : De Gruyter, ISSN 2196-7113, Bd. 78 (2011), 1, S. 3-14

http://dx.doi.org/10.1524/teme.2011.0077
Großmann, Marcus; Schneider, Christian;
Groupwise frequency domain multiuser MMSE turbo equalization for single carrier block transmission over spatially correlated channels. - In: IEEE journal of selected topics in signal processing. - New York, NY : IEEE, ISSN 1941-0484, Bd. 5 (2011), 8, S. 1548-1562

http://dx.doi.org/10.1109/JSTSP.2011.2173555
Khabbazibasmenj, Arash; Vorobyov, Sergiy A.
Power allocation based on SEP minimization in two-hop decode-and-forward relay networks. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 59 (2011), 8, S. 3954-3963

http://dx.doi.org/10.1109/TSP.2011.2150221
Hassanien, Aboulnasr; Vorobyov, Sergiy A.
Transmit energy focusing for DOA estimation in MIMO radar with colocated antennas . - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 59 (2011), 6, S. 2669-2682

http://dx.doi.org/10.1109/TSP.2011.2125960
Gong, Xiaowen; Vorobyov, Sergiy A.; Tellambura, Chintha
Optimal bandwidth and power allocation for sum ergodic capacity under fading channels in cognitive radio networks . - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 59 (2011), 4, S. 1814-1826

http://dx.doi.org/10.1109/TSP.2010.2101069
Gong, Xiaowen; Vorobyov, Sergiy A.; Tellambura, Chintha
Joint bandwidth and power allocation with admission control in wireless multi-user networks with and without relaying. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 59 (2011), 4, S. 1801-1813

http://dx.doi.org/10.1109/TSP.2010.2104146
Li, Sheng; Lamare, Rodrigo C.
Blind reduced-rank adaptive receivers for DS-UWB systems based on joint iterative optimization and the constrained constant modulus criterion. - In: IEEE transactions on vehicular technology : a publication of the IEEE Vehicular Technology Society.. - New York, NY : IEEE, ISSN 1939-9359, Bd. 60 (2011), 6, S. 2505-2518

http://dx.doi.org/10.1109/TVT.2011.2157844
Li, Sheng; Lamare, Rodrigo C.; Fa, Rui
Reduced-rank linear interference suppression for DS-UWB systems based on switched approximations of adaptive basis functions. - In: IEEE transactions on vehicular technology : a publication of the IEEE Vehicular Technology Society.. - New York, NY : IEEE, ISSN 1939-9359, Bd. 60 (2011), 2, S. 485-497

http://dx.doi.org/10.1109/TVT.2010.2090545
Haddad, Taghrid; Wetzstein, Olaf; Engert, Sonja; Töpfer, Hannes; Ortlepp, Thomas
Investigation of the relationship between the gray zone and the clock frequency of a Josephson comparator. - In: Superconductor science and technology : a multidisciplinary forum for workers involved in any aspect of the science and technology of superconductors.. - Bristol : IOP Publ., ISSN 1361-6668, Bd. 24 (2011), 9, S. 095010, insges. 6 S.

The Josephson comparator is one of the fundamental building blocks of rapid single flux quantum (RSFQ) electronics. Within this circuit family it is the exclusive device which provides logical data processing. The Josephson comparator is also the basic decision element for very fast analog-to-digital converters and sampler circuits for low input power and high-bandwidth signals based on the RSFQ technique. The performance of those devices is fundamentally determined by the characteristics of the Josephson comparator. In this study the gray zone dependency on the clock frequency of a Josephson comparator is investigated by simulations concerning the influence of thermal noise. This investigation is performed for a series of operating points defined by the bias current and different noise levels defined by the operating temperature. In contrast to former investigations, we analyzed the comparator embedded in a realistic environment for output data processing. We identified a characteristic clock frequency fc for a comparator topology designed for a 1 kA cm - 2 niobium fabrication technology. The gray zone of 8 A remains constant for clock frequencies below fc = 15 GHz and starts to increase for larger frequencies. We also found out that this characteristic frequency is independent of the intensity of thermal noise and therefore independent of temperature.



http://dx.doi.org/10.1088/0953-2048/24/9/095010
Brauer, Hartmut; Ziolkowski, Marek; Porzig, Konstantin; Töpfer, Hannes
Modelling and simulation of a simple homopolar motor of Faraday's type. - In: Facta Universitatis. Series electronics and energetics / Univerzitet u Nišu. - Niš : Univ., 1988- , ISSN: 0353-3670 , ZDB-ID: 1075142-7, ISSN 0353-3670, Bd. 24 (2011), 2, S. 221-242

During the application of simulation tools of computational electromagnetics it is sometimes difficult to decide whether the problems can be solved by the computation of electromagnetic fields or circuit simulation tools have to be applied additionally. The paper describes a typical situation in an electromagnetic CAD course, not only for beginners. The modelling and numerical simulation of a simple homopolar motor, similar to that what has been presented by Michael Faraday in 1821 firstly, was used as an example. To simulate the current flow in the permanent magnet the FEM software codes COMSOL Multiphysics including the integrated SPICE module and MAXWELL have been used. The correct simulation of the entire electric circuit as well as the precise modelling of the impressed current and of the electrode contacts turned out to be very important.



Bozbey, A.; Miyajima, S.; Ortlepp, Thomas; Fujimaki, A.
Design and circuit analysis of quasi-one junction SQUID comparators for low temperature detector array read-out. - In: Journal of superconductivity and novel magnetism. - New York, NY : Springer, ISSN 1557-1947, Bd. 24 (2011), 1/2, S. 1065-1069

In this study, we report on our simulation and experimental results for quasi-one junction SQUIDs (QOS) comparator targeted to be used in the front-end of the detector read-out circuits. The QOS is used as a 1-bit quantizer in the front-end of the read-out circuit. Their performance and reliability is very much depending on the circuit parameters of the QOSs. The main design parameters are the threshold level, gray zone width, and the chip-to-chip reproducibility over different fabrication batches. For some special applications, such as detector readout, the overall power consumption needs to be sufficient small. We measured threshold and gray zone counting each individual switching event for various bias and input current values and for different QOS designs. In addition, circuit simulations including thermal noise are used to explain the observed circuit behavior and to optimize design parameters.



http://dx.doi.org/10.1007/s10948-010-0865-y
Haverkamp, Imke; Wetzstein, Olaf; Kunert, Jürgen; Stolz, Ronny; Ortlepp, Thomas; Töpfer, Hannes
Characterization of a digital squid for magnetic field measurements with high dynamic range. - In: Elektronika. - Warszawa : Wydawn. Not Sigma, ISSN 0033-2089, Bd. 52 (2011), 6, S. 28-31

Measurements of extremely weak magnetic fields in unshielded environments require sensors providing a high dynamic range and slew rate while maintaining a high resolution. At present, analog Superconducting Quantum Interference Devices (SQUIDs) are the most sensitive sensors for magnetic flux. Due to their room-temperature feedback electronics necessary to maintain a stable point of operation, slew rates of those sensors are limited. The dynamic range is usually restricted by the resolution of classical analog to digital converters. The digital SQUID follows a different approach: a change of the magnetic field penetrating the pickup loop is translated by the sensor into a stream of voltage pulses. Each pulse represents the change of the magnetic flux inside the pickup loop by one flux quantum [Phi]0. By fast counting of these flux quanta, it is possible to outperform the analog SQUID in terms of dynamic range and maximum slew rate. We present our latest results with respect to the internal mechanisms of the digital SQUID and present a method to compensate the main source for nonlinear behavior of the sensor. The analyzed circuit was fabricated by FLUXONICS Foundry [1] in a 1 kA/cm2 niobium fabrication process.



Ortlepp, Thomas; Wetzstein, Olaf; Engert, Sonja; Kunert, Jürgen; Töpfer, Hannes
Reduced power consumption in superconducting electronics. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 21 (2011), 3, S. 770-775

Rapid single flux quantum (RSFQ) electronics is based on the Josephson junction as an active switching element. In standard RSFQ circuits its switching energy is much lower than the static power consumption caused by the resistive current distribution network. Due to this thermal heating of the chip, the maximum number of junctions on a single chip is limited to about 1 million. The frequency-dependent contribution to power dissipation from junction switchings is only about 2 percent of the static one. This fact limits the direct construction of VLSI systems for high-performance computing as well as small-scale circuit applications in the vicinity of ultra-sensitive detectors or even quantum circuits. We present an assessment of different approaches for reducing the static power consumption by investigating the potential of inductive bias distribution networks as well as reduced critical currents. We analyse the operation stability of simple digital circuits with 5 times smaller critical currents at 4.2 K. The combination of the reduced critical currents and inductive biasing can provide digital superconductive circuits with significantly reduced static power consumption. Index Terms-Josephson junction, magnetic field sensors, RSFQ, superconducting electronics.



http://dx.doi.org/10.1109/TASC.2011.2117410
Großmann, Marcus;
Outage performance analysis and code design for three-stage MMSE turbo equalization in frequency-selective Rayleigh fading channels. - In: IEEE transactions on vehicular technology : a publication of the IEEE Vehicular Technology Society.. - New York, NY : IEEE, ISSN 1939-9359, Bd. 60 (2011), 2, S. 473-484

http://dx.doi.org/10.1109/TVT.2010.2096440
Brückner, Klemens; Niebelschütz, Florentina; Tonisch, Katja; Förster, Christian; Cimalla, Volker; Stephan, Ralf; Pezoldt, Jörg; Stauden, Thomas; Ambacher, Oliver; Hein, Matthias A.
Micro- and nano-electromechanical resonators based on SiC and group III-nitrides for sensor applications. - In: Physica status solidi. Applied research. - Weinheim : Wiley-VCH, 1970- , ISSN: 1521-396X , ZDB-ID: 1481091-8, ISSN 1521-396X, Bd. 208 (2011), 2, S. 357-376

http://dx.doi.org/10.1002/pssa.201026343
Hartmann, Christian; Blau, Kurt; Hein, Matthias A.
An integrated SiGe HBT pulselength modulator for class-S power amplifiers in the UHF range. - In: IEEE transactions on circuits and systems. Regular papers / Institute of Electrical and Electronics Engineers. - New York, NY : Institute of Electrical and Electronics Engineers, 1992- , ISSN: 1558-0806 , ZDB-ID: 2028230-8, ISSN 1558-0806, Bd. 58 (2011), 1, S. 62-69

http://dx.doi.org/10.1109/TCSI.2010.2071510
Lamare, Rodrigo C.; deSampaio-Neto, Raimundo; Haardt, Martin
Blind adaptive constrained constant-modulus reduced-rank interference suppression algorithms based on interpolation and switched decimation. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 59 (2011), 2, S. 681-695

http://dx.doi.org/10.1109/TSP.2010.2091274
Minh, Hoa Le; O'Brien, Dominic; Faulkner, Grahame; Bouchet, Olivier; Wolf, Mike; Grobe, Liane; Li, Jianhui;
A 1.25-Gb/s indoor cellular optical wireless communications demonstrator. - In: IEEE photonics technology letters : PTL ; a publication of the IEEE Laser and Electro-Optics Society.. - New York, NY : IEEE, Bd. 22 (2010), 21, S. 1598-1600

http://dx.doi.org/10.1109/LPT.2010.2073696
Schühler, Mario; Bauer, Jan; Krauß, Alexander; Wansch, Rainer; Hein, Matthias A.
Phase constant measurement of periodically structured surfaces - the leaky-wave region. - In: IEEE antennas and wireless propagation letters. - New York, NY : IEEE, ISSN 1548-5757, Bd. 9 (2010), S. 383-386

http://dx.doi.org/10.1109/LAWP.2010.2049091
Schwarz, Ulrich; Thiel, Florian; Seifert, Frank; Stephan, Ralf; Hein, Matthias A.
Ultrawideband antennas for magnetic resonance imaging navigator techniques. - In: IEEE transactions on antennas and propagation : a publication of the IEEE Antennas and Propagation Society.. - New York, NY : IEEE, ISSN 0018-926X, Bd. 58 (2010), 6, S. 2107-2112

http://dx.doi.org/10.1109/TAP.2010.2046848
Hirsch, Ole; Janson, Malgorzata; Wiesbeck, Werner; Thomä, Reiner S.
Indirect localization and imaging of objects in an UWB sensor network. - In: IEEE transactions on instrumentation and measurement : IM ; a publication of the Instrumentation and Measurement Society.. - New York, NY : IEEE, Bd. 59 (2010), 11, S. 2949-2957

http://dx.doi.org/10.1109/TIM.2010.2046359
Schühler, Mario; Wansch, Rainer; Hein, Matthias A.
On strongly truncated leaky-wave antennas based on periodically loaded transmission lines. - In: IEEE transactions on antennas and propagation : a publication of the IEEE Antennas and Propagation Society.. - New York, NY : IEEE, ISSN 0018-926X, Bd. 58 (2010), 11, S. 3505-3514

http://dx.doi.org/10.1109/TAP.2010.2071353
Röhlig, Claus-Christian; Niebelschütz, Merten; Brückner, Klemens; Tonisch, Katja; Ambacher, Oliver; Cimalla, Volker
Elastic properties of nanowires. - In: Physica status solidi. Basic research. - Weinheim : Wiley-VCH, 1961- , ISSN: 1521-3951 , ZDB-ID: 1481096-7, ISSN 1521-3951, Bd. 247 (2010), 10, S. 2557-2570

http://dx.doi.org/10.1002/pssb.201046378
Römer, Florian; Haardt, Martin
Tensor-based channel estimation and Iterative refinements for two-way relaying with multiple antennas and spatial reuse. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 58 (2010), 11, S. 5720-5735

http://dx.doi.org/10.1109/TSP.2010.2062179
Anders, S.; Blamire, M. G.; Buchholz, Friedrich-Immanuel; Crété, D.-G.; Cristiano, R.; Febvre, Pascal; Fritzsch, Ludwig; Herr, A.; Il'ichev, E.; Kohlmann, J.
European roadmap on superconductive electronics - status and perspectives. - In: Physica. Superconductivity and its applications. - Amsterdam : North-Holland Physics Publ., 1988- , ISSN: 0921-4534 , ZDB-ID: 1467152-9, ISSN 0921-4534, Bd. 470 (2010), 23/24, S. 2079-2126

For four decades semiconductor electronics has followed Moore' s law: with each generation of integration the circuit features became smaller, more complex and faster. This development is now reaching a wall so that smaller is no longer any faster. The clock rate has saturated at about 3-5 GHz and the parallel processor approach will soon reach its limit. The prime reason for the limitation the semiconductor electronics experiences are not the switching speed of the individual transistor, but its power dissipation and thus heat. Digital superconductive electronics is a circuit- and device-technology that is inherently faster at much less power dissipation than semiconductor electronics. It makes use of superconductors and Josephson junctions as circuit elements, which can provide extremely fast digital devices in a frequency range - dependent on the material - of hundreds of GHz: for example a flip-flop has been demonstrated that operated at 750 GHz. This digital technique is scalable and follows similar design rules as semiconductor devices. Its very low power dissipation of only 0.1 Wper gates at 100 GHz opens the possibility of three-dimensional integration. Circuits like icroprocessors and analogue-to-digital converters for commercial and military applications have been demonstrated. In contrast to semiconductor circuits, the operation of superconducting circuits is based on naturally standardized digital pulses the area of which is exactly the flux quantum 0. The flux quantum is also the natural quantization unit for digital-to-analogue and analogue-to-digital converters. The latter application is so precise, that it is being used as voltage standard and that the physical unit 'Volt' is defined by means of this standard. Apart from its outstanding features for digital electronics, superconductive electronics provides also the most sensitive sensor for magnetic fields: the Superconducting Quantum Interference Device (SQUID). Amongst many other applications SQUIDs are used as sensors for magnetic heart and brain signals in medical applications, as sensor for geological surveying and food-processing and for non-destructive testing. As amplifiers of electrical signals, SQUIDs can nearly reach the theoretical limit given by Quantum Mechanics. A further important field of application is the detection of very weak signals by 'transition-edge' bolometer, superconducting nanowire single-photon detectors, and superconductive tunnel junctions. Their application as radiation detectors in a wide frequency range, from microwaves to X-rays is now standard. The very low losses of superconductors have led to commercial microwave filter designs that are now widely used in the USA in base stations for cellular phones and in military communication applications. The number of demonstrated applications is continuously increasing and there is no area in professional electronics, in which superconductive electronics cannot be applied and surpasses the performance of classical devices. Superconductive electronics has to be cooled to very low temperatures. Whereas this was a bottleneck in the past, cooling techniques have made a huge step forward in recent years: very compact systems with high reliability and a wide range of cooling power are available commercially, from micro coolers of match-box size with milli-Watt cooling power to high-reliability coolers of many Watts of cooling power for satellite applications. Superconductive electronics will not replace semiconductor electronics and similar room-temperature techniques in standard applications, but for those applications which require very high speed, low-power consumption, extreme sensitivity or extremely high precision, superconductive electronics is superior to all other available techniques. To strengthen the European competitiveness in superconductor electronics research projects have to be set-up in the following field: - Ultra-sensitive sensing and imaging. - Quantum measurement instrumentation. - Advanced analogue-to-digital converters. - Superconductive electronics technology.



http://dx.doi.org/10.1016/j.physc.2010.07.005
Ortlepp, Thomas; Mielke, Olaf; Kunert, Jürgen; Töpfer, Hannes
Improved operation range of digital superconductive electronics by implementing passive phaseshifters. - In: Physica. Superconductivity and its applications. - Amsterdam : North-Holland Physics Publ., 1988- , ISSN: 0921-4534 , ZDB-ID: 1467152-9, ISSN 0921-4534, Bd. 470 (2010), 21, S. 1955-1958

We implemented small superconducting loops containing a frozen single flux quantum in single flux quantum (SFQ) electronics. Such an element acts as a pi-phaseshifter which is the missing complementary circuit element in SFQ-electronics and can significantly improve the circuit reliability and robustness. We designed a four bit ripple counter including toggle flip-fops (TFF) with these pi-phaseshifters. We analyzed the circuit stability by means of bit error rate (BER) measurements versus bias supply. The measured operation range of the counter in standard technique was + - 14% and could be improved to + - 24% for the new version utilizing pi-phaseshifters. These results are a clear proof for a more robust circuit realization achieved without any additional power consumption. Furthermore, it supports the reduction of present power consumption in circuits by using smaller switching energy as well as the development of more complex circuits because of a reduced sensitivity against technological parameter spread.



http://dx.doi.org/10.1016/j.physc.2010.08.003
Milojevic, Marko; Del Galdo, Giovanni; Song, Nuan; Haardt, Martin; Heuberger, Albert
Impact of the receive antenna arrays on spatio-temporal availability in satellite-to-indoor broadcasting. - In: IEEE transactions on broadcasting : a publication of the IEEE Broadcast Technology Society.. - New York, NY : IEEE, ISSN 1557-9611, Bd. 56 (2010), 2, S. 171-183

http://dx.doi.org/10.1109/TBC.2010.2046432
Thakre, Arpita; Haardt, Martin; Römer, Florian; Giridhar, K.
Tensor-based spatial smoothing (TB-SS) using multiple snapshots. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 58 (2010), 5, S. 2715-2728

http://dx.doi.org/10.1109/TSP.2010.2043141
Großmann, Marcus; Ortlepp, Thomas; Matsumoto, Tad;
Rate allocation for 2-User MAC with MMSE turbo equalization. - In: IEEE transactions on wireless communications. - New York, NY : IEEE, Bd. 9 (2010), 3, S. 1033-1043

http://dx.doi.org/10.1109/TWC.2010.03.080894
Mielke, Olaf; Ortlepp, Thomas; Kunert, Jürgen; Meyer, Hans-Georg; Töpfer, Hannes
Controlled initialization of superconducting [pi]-phaseshifters and possible applications. - In: Superconductor science and technology : a multidisciplinary forum for workers involved in any aspect of the science and technology of superconductors.. - Bristol : IOP Publ., ISSN 1361-6668, Bd. 23.2010, 5, 055003, insges. 7 S.

The rapid single-flux quantum electronics (RSFQ) is a superconducting, naturally digital circuit family which is currently close to being commercially applied. RSFQ is outstanding because of its very low switching energy resulting in very low power consumption. This advantage causes, however, a significant influence of thermal noise. For industrial applications, a certain noise immunity is required which is still a challenge, especially for circuits of higher complexity. Integrating phase-shifting elements is a new concept for further improvements concerning stability against the influence of thermal noise. We have already shown that the implementation of phase-shifting elements significantly reduces the influence of thermal noise on circuit behavior by experimentally analyzing the bit-error rate (Mielke et al 2009 IEEE Trans. Appl. Supercond. 19 621-5). Concepts which are easily implementable in standard niobium technology are especially promising. The π-phaseshifter consists of a superconducting loop which is able to store a single flux quantum. The loop current related to the stored flux creates a well-defined phase shift. To achieve the correct functionality of complex circuits it is essential to store exactly one flux quantum in each π-phaseshifter during the cooling down of the chip. Thus, for studying the feasibility of this new approach, the initialization reliability of the π-phaseshifter needs to be verified. We present an experimental investigation of this reliability to obtain a general assessment for the application of the π-phaseshifter in niobium technology. Furthermore, we compare the configuration shielded by a solid ground plane with a configuration with a ground-plane hole below the π-phaseshifter. Justified by the experimental results we suggest programmable RSFQ circuits based on π-phaseshifters. The characteristics of these devices can be influenced by a controlled initialization of the π-phaseshifter. The fabrication was performed by FLUXONICS Foundry.



http://dx.doi.org/10.1088/0953-2048/23/5/055003
Ebert, Björn; Mielke, Olaf; Kunert, Jürgen; Stolz, Ronny; Ortlepp, Thomas
Experimentally verified design guidelines for minimizing the gray zone width of Josephson comparators. - In: Superconductor science and technology : a multidisciplinary forum for workers involved in any aspect of the science and technology of superconductors.. - Bristol : IOP Publ., ISSN 1361-6668, Bd. 23.2010, 5, 055005, insges. 8 S.

We investigated the gray zone width of Josephson comparators by means of circuit simulations and experiments, looking at the dependences on different circuit parameters and topologies. Eight different comparator circuits were simulated and designed for a 1 kA cm 2 niobium device. With our sophisticated measurement set-up, the lowest reported gray zone width of 3.2 A at 4.2 K was measurable. Moreover, the results obtained allow us to derive a set of design rules for further reduction of the gray zone width, which was the original goal of our investigations. (Some figures in this article are in colour only in the electronic version)



http://dx.doi.org/10.1088/0953-2048/23/5/055005
Shen, Guowei; Zetik, Rudolf; Hirsch, Ole; Thomä, Reiner;
Range-based localization for UWB sensor networks in realistic environments. - In: EURASIP journal on wireless communications and networking : EURASIP JWCN.. - Heidelberg : Springer, ISSN 1687-1499, (2010), Article ID 476598, insges. 9 S.

https://jwcn-eurasipjournals.springeropen.com/articles/10.1155/2010/476598
Haueisen, Jens; Ramon, Ceon; Brauer, Hartmut; Nowak, Hannes;
Der Einfluß der Änderung der lokalen Gewebeleitfähigkeit auf das Elektroenzephalogramm und das Magnetoenzephalogramm :
The influence of local tissue conductivity changes on the magnefoencephalogram and the electroencephalogram. - In: Biomedical engineering : joint journal of the German Society for Biomedical Engineering in VDE and the Austrian and Swiss Societies for Biomedical Engineering.. - Berlin [u.a.] : de Gruyter, ISSN 1862-278X, Bd. 45 (2000), 7/8, S. 211-214

https://doi.org/10.1515/bmte.2000.45.7-8.211
Haueisen, Jens; Böttner, Annegret; Nowak, Hannes; Brauer, Hartmut; Weiller, Cornelius;
Der Einfluß der Änderung der Schalenleitfähigkeit bei Randelementemodellen auf die Vorwärtsrechnung und das inverse Problem in Elektroenzephalographie und Magnetoenzephalographie :
The influence of conductivity changes in boundary element compartments on the forward and inverse problem in electroencephalography and magnetoencephalography. - In: Biomedical engineering : joint journal of the German Society for Biomedical Engineering in VDE and the Austrian and Swiss Societies for Biomedical Engineering.. - Berlin [u.a.] : de Gruyter, ISSN 1862-278X, Bd. 44 (1999), 6, S. 150-157

https://doi.org/10.1515/bmte.1999.44.6.150
Sachs, Jürgen; Borokhovych, Yevgen; Gustat, H.; Heinen, Stefan; Kmec, Martin; Robens, Markus; Scheytt, Christoph; Schilling, Kai; Sewiolo, Benjamin; Weigel, Robert
New integrated UWB-sensor electronics for array-based super-resolution imaging techniques. - In: Frequenz : journal of RF-engineering and telecommunications.. - Berlin : De Gruyter, ISSN 2191-6349, Bd. 63 (2009), 9/10, S. 175-178

http://dx.doi.org/10.1515/FREQ.2009.63.9-10.175
Thiel, Florian; Helbig, Marko; Schwarz, Ulrich; Geyer, Christiane; Rimkus, Gabriella; Kaiser, Werner Alois; Hilger, Ingrid; Hein, Matthias A.; Sachs, Jürgen; Seifert, Frank
Implementation of ultra-wideband sensors for biomedical applications. - In: Frequenz : journal of RF-engineering and telecommunications.. - Berlin : De Gruyter, ISSN 2191-6349, Bd. 63 (2009), 9/10, S. 221-224

http://dx.doi.org/10.1515/FREQ.2009.63.9-10.221
Aftanas, Michal; Sachs, Jürgen; Drutarovský, Miloš; Kocur, Dušan
Efficient and fast method of wall parameter estimation by using UWB radar system. - In: Frequenz : journal of RF-engineering and telecommunications.. - Berlin : De Gruyter, ISSN 2191-6349, Bd. 63 (2009), 11/12, S. 231-235

http://dx.doi.org/10.1515/FREQ.2009.63.11-12.231
Wolf, Mike; Song, Nuan; Haardt, Martin
Non-coherent UWB communications. - In: Frequenz : journal of RF-engineering and telecommunications.. - Berlin : De Gruyter, ISSN 2191-6349, Bd. 63 (2009), 9/10, S. 187-191

http://dx.doi.org/10.1515/FREQ.2009.63.9-10.187
Born, Volker; Beck, M.; Bosholm, Ole; Dalleau, David; Glenz, S.; Haverkamp, Imke; Kurz, G.; Lange, F.; Vest, A.
Extended metallization reliability testing : combining standard wafer level with product tests to increase test sensitivity. - In: Microelectronics reliability. - Amsterdam [u.a.] : Elsevier, ISSN 0026-2714, Bd. 49 (2009), 1, S. 74-78

For future semiconductor technologies with larger interconnect aspect ratios, metallization is more prone to stress and electro migration. Therefore. metallization reliability is expected to become increasingly important. However, challenges arise if test structures and test methodologies are not accommodated to trace reliability issues with sufficient sensitivity. In such cases long test times and high volume tests are required to guaranty the metallization reliability. An extended test method is presented which addresses these problems by directly investigating the product at wafer level instead of a limited set of test structures. The method will be demonstrated for the example of stress ausmigration in aluminum filled vias.



http://dx.doi.org/doi:10.1016/j.microrel.2008.10.017
Volmer, Christian; Stephan, Ralf; Hein, Matthias A.
Evaluation of a mutually coupled diversity receiver. - In: Radioengineering. - Prague, ISSN 1210-2512, Bd. 18 (2009), 4, S. 445-453

Milojevic, Marko; Haardt, Martin; Eberlein, Ernst; Heuberger, Albert
Channel modeling for multiple satellite broadcasting systems. - In: IEEE transactions on broadcasting : a publication of the IEEE Broadcast Technology Society.. - New York, NY : IEEE, ISSN 1557-9611, Bd. 55 (2009), 4, S. 705-718

http://dx.doi.org/10.1109/TBC.2009.2030464
Thomä, Reiner;
UKoLoS - ultra-wideband radio technologies for communications, localisation and sensor applications. - In: Frequenz. - Berlin : de Gruyter, ISSN 0016-1136, Bd. 63 (2009), 9/10, S. 170-171

Römer, Florian; Haardt, Martin
Algebraic norm-maximizing (ANOMAX) transmit strategy for two-way relaying with MIMO amplify and forward relays. - In: IEEE signal processing letters : a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, ISSN 1558-2361, Bd. 16 (2009), 10, S. 909-912

http://dx.doi.org/10.1109/LSP.2009.2026453
Kulke, Reinhard; Möllenbeck, G.; Günner, C.; Uhlig, Peter; Drüe, Karl-Heinz; Humbla, Stefan; Müller, Jens; Stephan, Ralf; Stöpel, Dirk; Trabert, Johannes F.
Ceramic microwave circuits for satellite communication. - In: Journal of microelectronics and electronic packaging. - Washington, DC : IMAPS, ISSN 1551-4897, Bd. 6 (2009), 1, S. 27-31

Ebert, Björn; Ortlepp, Thomas; Uhlmann, F. Hermann
Experimental study of the effect of flux trapping on the operation of RSFQ circuits. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 19 (2009), 3, S. 607-610

This paper investigates the robustness of different ground plane configurations of superconducting circuits against magnetic flux trapping. The robustness of the circuit is determined by the change of the error rate at a specific operating point under the influence of an external magnetic field. A large number of thermocycles are used to determine the statistic properties of the error rate. The proposed measurement setup allows a fast scan of a two-dimensional operating area.



http://dx.doi.org/10.1109/TASC.2009.2018738
Ortlepp, Thomas; Uhlmann, F. Hermann
Impedance matching of microstrip inductors in digital superconductive electronics. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 19 (2009), 3, S. 644-648

State-of-the-art RSFQ circuits consist of Josephson junctions, inductances and bias current sources, where the inductances are practically used as functional elements. Even more, their value defines the functionality and therefore the conventional design process requires strict conditions for the wiring between Josephson junctions. The present design and optimization process does not take into account their parasitic capacitances to ground. This becomes an important issue for ultra fast applications above 100 GHz, but also for circuits dedicated to control quantum electronics. We report on a theoretical and experimental investigation of the influence of ground capacitances. The impedance matching between the connecting microstrip lines and the Josephson junction is a key issue for the correct operation of these circuits. We performed circuit simulations and collected experimental data of correct and incorrect operating circuits to derive design criteria. The critical reflection coefficient is found to be 0.35 and the particular design must use a smaller value for transfer and a larger value for storage of SFQ pulses, respectively.



http://dx.doi.org/10.1109/TASC.2009.2019284
Mielke, Olaf; Ortlepp, Thomas; Febvre, Pascal; Uhlmann, F. Hermann
Reduced probability of noise introduced malfunction in RSFQ circuits by implementing intrinsic [pi]-phaseshifter. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 19 (2009), 3, S. 621-625

The Rapid Single Flux Quantum lectronics is characterized by a low switching energy, which makes it susceptible to noise introduced bit-errors. For industrial applications a certain noise immunity is required which is still a challenge especially for circuits of higher complexity.We analysed the influence of each individual resistor in a toggle Flip-Flop circuit to the overall bit-error rate. The shunt resistors of comparator structures are the dominant noise sources and bias resistors have almost no influence. Our theoretical analysis shows a significant impact of the phase offset caused by a pi-phaseshifter, which increases the robustness of RSFQ electronics even for circuits fabricated in mature Nb-technology. We experimentally investigated the influence of the pi-phaseshifter on the bit-error rate. We designed dedicated test circuits with and without a phaseshifter. There are only slight differences in the layout of both cells, thus it can be concluded that this advantage is based only on the influence of the phaseshifter. Our presented experiments show significant variances in the bit-error rate confirming the improved immunity against noise. Design and fabrication were performed by FLUXONICS Foundry.



http://dx.doi.org/10.1109/TASC.2009.2018145
Wuensch, Stefan; Ortlepp, Thomas; Crocoll, Erich; Uhlmann, F. Hermann; Siegel, Michael
Cryogenic semiconductor amplifier for RSFQ-circuits with high data rates at 4.2 K. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 19 (2009), 3, S. 574-579

The connection of RSFQ circuits with commercial room temperature electronics and amplifying SFQ pulses with high data rates require cryogenic interface amplifiers. Such amplifiers should provide extremely high bandwidth, low noise and low power consumption at the same time. Various hybrid amplifiers based on commercial p-HEMT transistors in an embedded microwave design were designed and characterized. Towards the p-HEMT transistor characterization at cryogenic temperature the biasing settings according to an optimum between voltage gain and low power consumption were determined. Thus a total power consumption of 2 mW and a voltage gain of 12 dB per single stage were achieved. For a preamplifier and an amplifier concept a multiple number of these stages were implemented in a microstrip and a coplanar transmission line design with a special matched interconnect taper towards the RSFQ components. Measurements of the amplifiers, the combination of an amplifier with a RSFQ circuit at 4.2 K showed their good performances without any disturbance of the RSFQ circuit. Due to the losses between the stages a total gain of 25 dB with a four stage amplifier was achieved; pulse rates went up to 3 Gb/s. The total power consumption was in the range of 8 mW. Further increase of data rates will be achieved by improving the matching between RSFQ output stage and amplifier.



http://dx.doi.org/10.1109/TASC.2009.2018425
Großmann, Marcus;
SVD-based precoding for single carrier MIMO transmission with frequency domain MMSE turbo equalization. - In: IEEE signal processing letters : a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, ISSN 1558-2361, Bd. 16 (2009), 5, S. 418-421

http://dx.doi.org/10.1109/LSP.2009.2016455
Thakre, Arpita; Haardt, Martin; Giridhar, K.
Single snapshot spatial smoothing with improved effective array aperture. - In: IEEE signal processing letters : a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, ISSN 1558-2361, Bd. 16 (2009), 6, S. 505-508

http://dx.doi.org/10.1109/LSP.2009.2017573
Ching, Gilbert Siy; Ghoraishi, Mir; Landmann, Markus; Lertsirisopon, Navarat; Takada, Jun-ichi; Imai, Tetsuro; Sameda, Itoji; Sakamoto, Hironori
Wideband polarimetric directional propagation channel analysis inside an arched tunnel. - In: IEEE transactions on antennas and propagation : a publication of the IEEE Antennas and Propagation Society.. - New York, NY : IEEE, ISSN 0018-926X, Bd. 57 (2009), 3, S. 760-767

http://dx.doi.org/10.1109/TAP.2009.2013417
Volmer, Christian; Weber, Jörn; Stephan, Ralf; Hein, Matthias A.
A descriptive model for analyzing the diversity performance of compact antenna arrays. - In: IEEE transactions on antennas and propagation : a publication of the IEEE Antennas and Propagation Society.. - New York, NY : IEEE, ISSN 0018-926X, Bd. 57 (2009), 2, S. 395-405

http://dx.doi.org/10.1109/TAP.2008.2011244
Kapitanova, Polina; Kholodnyak, Dmitry; Humbla, Stefan; Perrone, Ruben; Müller, Jens; Hein, Matthias A.; Vendik, Irina
Right- and left-handed transmission line resonators and filters for dual-band applications. - In: Microwave and optical technology letters. - New York, NY [u.a.] : Wiley, ISSN 1098-2760, Bd. 51 (2009), 3, S. 629-633

http://dx.doi.org/10.1002/mop.24117
Thiel, Florian; Hein, Matthias A.; Schwarz, Ulrich; Sachs, Jürgen; Seifert, Frank
Combining magnetic resonance imaging and ultrawideband radar: a new concept for multimodal biomedical imaging. - In: Review of scientific instruments : a monthly journal devoted to scientific instruments, apparatus, and techniques.. - [S.l.] : American Institute of Physics, ISSN 1089-7623, Bd. 80 (2009), 1, S. 014302, insges. 10 S.

http://dx.doi.org/10.1063/1.3065095
Ortlepp, Thomas; Wuensch, Stefan; Schubert, Marco; Febvre, Pascal; Ebert, Björn; Kunert, Jürgen; Crocoll, Erich; Meyer, Hans-Georg; Siegel, Michael; Uhlmann, F. Hermann
Superconductor-to-semiconductor interface circuit for high data rates. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 19 (2009), 1, S. 28-34

http://dx.doi.org/10.1109/TASC.2008.2009997
Heuberger, Albert;
Fade correlation and diversity effects in satellite broadcasting to mobile users in S-band. - In: International journal of satellite communications and networking. - New York, NY [u.a.] : Wiley, ISSN 1542-0981, Bd. 26 (2008), 5, S. 359-379

https://doi.org/10.1002/sat.906
Brauer, Hartmut; Ziolkowski, Marek;
Eddy current testing of metallic sheets with defects using force measurements. - In: Serbian journal of electrical engineering. - Čačak : Univ., ISSN 2217-7183, Bd. 5 (2008), 1, S. 11-20

https://doi.org/10.2298/SJEE0801011B
Konstantinovic, Miodrag; Wöckel, Sebastian; Schulze Lammers, Peter; Sachs, Jürgen
UWB radar system for yield monitoring of sugar beet. - In: Transactions of the ASABE. - St. Joseph, Mich. : American Society of Agricultural and Biological Engineers, ISSN 2151-0032, Bd. 51 (2008), 2, S. 753-761

Hirsch, Ole; Alexander, Paul; Gladden, Lynn F.
Techniques for cancellation of interfering multiple reflections in terahertz time-domain measurements. - In: Microelectronics journal. - Amsterdam [u.a.] : Elsevier Science, Bd. 39 (2008), 5, S. 841-848

http://dx.doi.org/10.1016/j.mejo.2008.01.001
Volmer, Christian; Sengül, Metin; Weber, Jörn; Stephan, Ralf; Hein, Matthias
Broadband decoupling and matching of a superdirective two-port antenna array. - In: IEEE antennas and wireless propagation letters. - New York, NY : IEEE, ISSN 1548-5757, Bd. 7 (2008), S. 613-616

http://dx.doi.org/10.1109/LAWP.2008.2006767
Schühler, Mario; Volmer, Christian; Wansch, Rainer; Hein, Matthias
Impedance measurement of a dipole above a periodically structured reflective surface. - In: IEEE antennas and wireless propagation letters. - New York, NY : IEEE, ISSN 1548-5757, Bd. 7 (2008), S. 617-620

http://dx.doi.org/10.1109/LAWP.2008.2006636
Brückner, Klemens; Niebelschütz, Florentina; Tonisch, Katja; Michael, Steffen; Dadgar, Armin; Krost, Alois; Cimalla, Volker; Ambacher, Oliver; Stephan, Ralf; Hein, Matthias
Two-dimensional electron gas based actuation of piezoelectric AlGaN/GaN microelectromechanical resonators. - In: Applied physics letters. - Melville, NY : American Inst. of Physics, ISSN 1077-3118, Bd. 93 (2008), 17, S. 173504, insges. 3 S.

http://dx.doi.org/10.1063/1.3002296
Tick, T.; Peräntie, J.; Rentsch, Sven; Müller, Jens; Hein, Matthias; Jantunen, H.
Co-sintering of barium strontium titanate (BST) thick films inside a LTCC substrate with pressure-assisted sintering. - In: Journal of the European Ceramic Society. - Amsterdam [u.a.] : Elsevier Science, ISSN 0955-2219, Bd. 28 (2008), 14, S. 2765-2769

http://dx.doi.org/10.1016/j.jeurceramsoc.2008.04.011
Czink, Nicolai; Del Galdo, Giovanni; Yin, Xuefeng; Bonek, Ernst; Ylitalo, Juha
A novel environment characterization metric for clustered MIMO channels : used to validate a SAGE parameter estimator. - In: Wireless personal communications : an international journal.. - Dordrecht [u.a.] : Springer Science + Business Media B.V, ISSN 1572-834X, Bd. 46 (2008), 1, S. 83-98

http://dx.doi.org/10.1007/s11277-007-9357-1
Kim, Jee Hyun; Zirwas, Wolfgang; Haardt, Martin
Efficient feedback via subspace-based channel quantization for distributed cooperative antenna systems with temporally correlated channels. - In: EURASIP journal on advances in signal processing. - Heidelberg : Springer, ISSN 1687-6180, 2008, Article ID 847296, insges. 13 S.

http://dx.doi.org/10.1155/2008/847296
Stankovic, Veljko; Haardt, Martin;
Generalized design of multi-user MIMO precoding matrices. - In: IEEE transactions on wireless communications. - New York, NY : IEEE, Bd. 7 (2008), 3, S. 953-961

http://dx.doi.org/10.1109/LCOMM.2008.060709
De Lamare, Rodrigo C.; Haardt, Martin; Sampaio-Neto, Raimundo
Blind adaptive constrained reduced-rank parameter estimation based on constant modulus design for CDMA interference suppression. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 56 (2008), 6, S. 2470-2482

http://dx.doi.org/10.1109/TSP.2007.913161
Haardt, Martin; Römer, Florian; Del Galdo, Giovanni
Higher-order SVD-based subspace estimation to improve the parameter estimation accuracy in multidimensional harmonic retrieval problems. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 56.2008, 7, Pt. 2, S. 3198-3213

http://dx.doi.org/10.1109/TSP.2008.917929
Reich, Torsten; Febvre, Pascal; Ortlepp, Thomas; Uhlmann, F. Hermann; Kunert, Jürgen; Stolz, Ronny; Meyer, Hans-Georg
Experimental study of a hybrid single flux quantum digital superconducting quantum interference device magnetometer. - In: Journal of applied physics : AIP's archival journal for significant new results in applied physics.. - Melville, NY : American Inst. of Physics, ISSN 1089-7550, Bd. 104 (2008), 2, S. 024509, insges. 9 S.

http://dx.doi.org/10.1063/1.2958327
Ziolkowski, Marek; Brauer, Hartmut
Calibration of magnetic field sensors in a MFT system. - In: IEEE transactions on magnetics : a publication of the IEEE Magnetics Society.. - New York, NY : IEEE, ISSN 1941-0069, Bd. 44 (2008), 6, S. 1626-1629

http://dx.doi.org/10.1109/TMAG.2007.916415
S¸engül, Metin; Yarman, Siddik B.; Volmer, Christian; Hein, Matthias
Design of distributed-element RF filters via reflectance data modeling. - In: International journal of electronics and communications. - München : Elsevier, ISSN 1618-0399, Bd. 62 (2008), 7, S. 483-489

http://dx.doi.org/10.1016/j.aeue.2007.05.009
Dimov, Boyko; Ortlepp, Thomas; Mladenov, Valeri; Terzieva, S.; Uhlmann, F. Hermann;
The asynchronous rapid single-flux quantum electronics - a promising alternative for the development of high-performance digital circuits. - In: Advances in radio science : Kleinheubacher Berichte.. - Göttingen : Copernicus Publications, ISSN 1684-9973, Bd. 6 (2008), S. 165-173

In this paper, we investigate the application of the asynchronous logic approach for the realization of ultra high-speed digital electronics with high complexity. We evaluate the possible physical, technological, and schematical origins of restrictions limiting such an application, and propose solutions for their overcoming. Although our considerations are based on the rapid single flux quantum technique, the conclusions derived can be generalized about any type of digital information coding.



http://dx.doi.org/10.5194/ars-6-165-2008
Serebryakova, Elena; Blau, Kurt; Hein, Matthias;
Miniaturisation of combline filters for switched-mode power amplifier systems. - In: Advances in radio science : Kleinheubacher Berichte.. - Göttingen : Copernicus Publications, ISSN 1684-9973, Bd. 6 (2008), S. 125-127

http://dx.doi.org/10.5194/ars-6-125-2008
Ebert, Björn; Reich, Torsten; Ortlepp, Thomas; Febvre, Pascal; Uhlmann, F. Hermann
Influence of trapped flux on critical currents of Josephson junctions. - In: IEICE electronics express. - Tokyo : Japan Science and Technology Information Aggregator, Electronic, J-STAGE, ISSN 1349-2543, Bd. 5 (2008), 11, S. 431-436

This paper investigates the influence of external field on the distribution of the critical current of Josephson junctions. The external field can cause trapped flux which may reduce the critical current. Experimental results show a formation of bunches in the distribution of the critical current when the external magnetic field rises a certain limit. From a theoretical point of view this formation can only be explained by attractive pinning points in the vicinity of the junction. The Josephson junctions were fabricated with the 1 kA/cm2 Nb/Al2O3/Nb trilayer process of FlUXONICS Foundry.



http://dx.doi.org/10.1587/elex.5.431
Volmer, Christian; Weber, Jörn; Stephan, Ralf; Blau, Kurt; Hein, Matthias A.
An eigen-analysis of compact antenna arrays and its application to port decoupling. - In: IEEE transactions on antennas and propagation : a publication of the IEEE Antennas and Propagation Society.. - New York, NY : IEEE, ISSN 0018-926X, Bd. 56 (2008), 2, S. 360-370

http://dx.doi.org/10.1109/TAP.2007.915450
Grossmann, Marcus; Matsumoto, Tad
Nonlinear frequency domain MMSE turbo equalization using probabilistic data association. - In: IEEE communications letters. - New York, NY : IEEE, ISSN 1089-7798, Bd. 12 (2008), 4, S. 295-297

http://dx.doi.org/10.1109/LCOMM.2008.071600
Dimov, Boyko; Balashov, D.; Khabipov, M.; Ortlepp, Thomas; Buchholz, Friedrich-Immanuel; Zorin, A. B.; Niemeyer, J.; Uhlmann, F. Hermann
Implementation of superconductive passive phase shifters in high-speed integrated RSFQ digital circuits. - In: Superconductor science and technology : a multidisciplinary forum for workers involved in any aspect of the science and technology of superconductors.. - Bristol : IOP Publ., ISSN 1361-6668, Bd. 21.2008, 4, 045007, insges. 7 S.

The reduction of the critical current density in rapid single-flux quantum (RSFQ) circuits enables new application fields, like quantum computing and photonic detector readout. The low current density fabrication process creates new design challenges, such as lower stability against thermal fluctuations, violation of the lumped elements condition for microstrip inductances and increased sensitivity to the technological spread. To overcome these issues, we suggest a passive phase shifter as a promising alternative technique for superconductive phase dropping in the RSFQ electronics. - Here, we study experimentally their applicability in high-speed RSFQ digital circuits. Conclusions are drawn about the impact of the passive phase shifters on the complexity, the speed and the bit error rate of the investigated RSFQ circuits. We demonstrate the successful operation of different circuits with implemented passive phase shifters a low and high speeds.



http://dx.doi.org/10.1088/0953-2048/21/4/045007
Cimalla, Volker; Röhlig, Claus-Christian; Pezoldt, Jörg; Niebelschütz, Merten; Ambacher, Oliver; Brückner, Klemens; Hein, Matthias; Weber, Jochen; Milenkovic, Srdjan; Smith, Andrew Jonathan; Hassel, Achim Walter;
Nanomechanics of single crystalline tungsten nanowires. - In: Journal of nanomaterials : JNM.. - New York, NY : Hindawi Publ., ISSN 1687-4129, (2008), Article ID 638947, insges. 9 S.

http://dx.doi.org/10.1155/2008/638947
Algeier, Vadim; Demissie, Bruno; Koch, Wolfgang; Thomä, Reiner
State space initiation for blind mobile terminal position tracking. - In: EURASIP journal on advances in signal processing. - Heidelberg : Springer, ISSN 1687-6180, 2008, Article ID 394219, insges. 14 S.

http://dx.doi.org/10.1155/2008/394219
Sutor-Dziedzic, Aneta;
Scanning acoustic and X-ray microscopy as attractive tools for diagnostics of electronic components. - In: Elektronika. - Warszawa : Wydawn. Not Sigma, ISSN 0033-2089, Bd. 48 (2007), 12, S. 14-16

Amon, Peter; Rathgen, Thomas; Singer, David
File format for scalable video coding. - In: IEEE transactions on circuits and systems for video technology : CSVT ; a publication of the IEEE Circuits and Systems Society.. - New York, NY : Institute of Electrical and Electronics Engineers, ISSN 1558-2205, Bd. 17 (2007), 9, S. 1174-1185

http://dx.doi.org/10.1109/TCSVT.2007.905521
Niebelschütz, Florentina; Cimalla, Volker; Brückner, Klemens; Stephan, Ralf; Tonisch, Katja; Hein, Matthias A.; Ambacher, Oliver
Sensing applications of micro- and nanoelectromechanical resonators. - In: Proceedings of the Institution of Mechanical Engineers. - London : Sage Publ., ISSN 2041-3092, Bd. 221 (2007), 2, S. 59-65

http://dx.doi.org/10.1243/17403499JNN100
Quinlan, Angela; Barbot, Jean-Pierre; Larzabal, Pascal; Haardt, Martin
Model order selection for short data: an exponential fitting test (EFT). - In: EURASIP journal on advances in signal processing. - Heidelberg : Springer, ISSN 1687-6180, 2007, Article ID 71953, insges. 11 S.

http://dx.doi.org/10.1155/2007/71953
Grossmann, Marcus; Matsumoto, Tad
Hybrid turbo multiuser detection for OFDM transmission with spatially-correlated channels. - In: IEEE communications letters. - New York, NY : IEEE, ISSN 1089-7798, Bd. 11 (2007), 5, S. 420-422

http://dx.doi.org/10.1109/LCOMM.2007.062072
Matsumoto, Tad; Hong, Aihua
On the MMSE criterion for space-time coded signaling in the presence of unknown interference. - In: Research letters in communications. - New York, NY : Hindawi, ISSN 1687-675X, 2007, Article ID 83283, insges. 3 S.

http://dx.doi.org/10.1155/2007/83283
Hirsch, Ole; Alexander, Paul
Terahertz direct-contact refractometer/spectrometer. - In: Optics letters. - Washington, DC : Soc., ISSN 1539-4794, Bd. 32 (2007), 14, S. 2043-2045

http://dx.doi.org/10.1364/OL.32.002043
Konstantinovic, Miodrag; Wöckel, Sebastian; Schulze Lammers, Peter; Sachs, Jürgen; Martinov, Milan
Detection of root biomass using ultra wideband radar - an approach to potato nest positioning. - In: CIGR Journal : agricultural engineering international: CIGR journal ; CIGR official publication.. - Paris [u.a.] : CIGR, Bd. 9.2007 (Mai), Ms. IT 06 003, insges. 11 S.

http://hdl.handle.net/1813/10662
Obradovic, Jelena; Collins, James H. P.; Hirsch, Ole; Mantle, Michael D.; Johns, Michael L.; Gladden, Lynn F.
The use of THz time-domain reflection measurements to investigate solvent diffusion in polymers. - In: Polymer : the international journal for the science and technology of polymers.. - Oxford : Elsevier Science, ISSN 0032-3861, Bd. 48 (2007), 12, S. 3494-3503

http://dx.doi.org/10.1016/j.polymer.2007.04.010
Matsumoto, Tad; Ibi, Shinsuke; Sampei, Seiichi; Thomä, Reiner
Adaptive transmission with single-carrier multilevel BICM. - In: Proceedings of the IEEE. - New York, NY [u.a.] : Inst., ISSN 1558-2256, Bd. 95 (2007), 12, S. 2354-2367

http://dx.doi.org/10.1109/JPROC.2007.904441
Landmann, Markus; Sivasondhivat, Kriangsak; Takada, Jun-ichi; Ida, Ichirou; Thomä, Reiner;
Polarization behavior of discrete multipath and diffuse scattering in urban environments at 4.5 GHz. - In: EURASIP journal on wireless communications and networking : EURASIP JWCN.. - Heidelberg : Springer, ISSN 1687-1499, (2007), Article ID 57980, insges. 16 S.

https://doi.org/10.1155/2007/57980
Savelyev, Timofey Grigorievich; Kempen, Luc; Sahli, Hichem; Sachs, Jürgen; Sato, Motoyuki
Investigation of time-frequency features for GPR landmine discrimination. - In: IEEE transactions on geoscience and remote sensing : a publication of the IEEE Geoscience and Remote Sensing Society.. - New York, NY : IEEE, Bd. 45 (2007), 1, S. 118-129

http://dx.doi.org/10.1109/TGRS.2006.885077
Sachs, Jürgen; Peyerl, Peter; Wöckel, Sebastian; Kmec, Martin; Herrmann, Ralf; Zetik, Rudolf
Liquid and moisture sensing by ultra-wideband pseudo-noise sequence signals. - In: Measurement science and technology : devoted to the theory, practice and application of measurement in physics, chemistry, engineering and the environmental and life sciences from inception to commercial exploitation.. - Bristol : IOP Publ., ISSN 1361-6501, Bd. 18 (2007), 4, S. 1074-1087

http://dx.doi.org/10.1088/0957-0233/18/4/016
Bredemeier, Knut; Poschmann, Ralf; Schmidt, Franz
Development of luminous objects with measured ray data : spatially resolved ray measurements on lamps and LEDs. - In: Laser + Photonik. - München : Hanser, ISSN 1610-3521, (2007), 2, S. 20-24

Zetik, Rudolf; Sachs, Jürgen; Thomä, Reiner S.
UWB short-range radar sensing : the architecture of a baseband, pseudo-noise UWB radar sensor. - In: IEEE instrumentation & measurement magazine. - New York, NY : IEEE, Bd. 10 (2007), 2, S. 39-45

http://dx.doi.org/10.1109/MIM.2007.364960
Ibi, Shinsuke; Matsumoto, Tad; Thomä, Reiner; Sampei, Seiichi; Morinaga, Norihiko
EXIT chart-aided adaptive coding for multilevel BICM with turbo equalization in frequency-selective MIMO channels. - In: IEEE transactions on vehicular technology : a publication of the IEEE Vehicular Technology Society.. - New York, NY : IEEE, ISSN 1939-9359, Bd. 56.2007, 6, Pt. 2, S. 3757-3769

http://dx.doi.org/10.1109/TVT.2007.901959
Fuchs, Martin; Del Galdo, Giovanni; Haardt, Martin
Low-complexity space-time-frequency scheduling for MIMO systems with SDMA. - In: IEEE transactions on vehicular technology : a publication of the IEEE Vehicular Technology Society.. - New York, NY : IEEE, ISSN 1939-9359, Bd. 56 (2007), 5, S. 2775-2784

http://dx.doi.org/10.1109/TVT.2007.898382
Brückner, Klemens; Cimalla, Volker; Niebelschütz, Florentina; Stephan, Ralf; Tonisch, Katja; Ambacher, Oliver; Hein, Matthias A.
Strain- and pressure-dependent RF response of microelectromechanical resonators for sensing applications. - In: Journal of micromechanics and microengineering. - Bristol : Inst., ISSN 1361-6439, Bd. 17 (2007), 10, S. 2016-2023

http://dx.doi.org/10.1088/0960-1317/17/10/013
Ferréol, Anne; Boyer, Eric; Larzabal, Pascal; Haardt, Martin
On the introduction of an extended coupling matrix for a 2D bearing estimation with an experimental RF system. - In: Signal processing : a European journal devoted to the methods and applications of signal processing.. - Amsterdam [u.a.] : Elsevier, Bd. 87 (2007), 9, S. 2005-2016

http://dx.doi.org/10.1016/j.sigpro.2007.01.031
Balashov, Dmitri; Dimov, Boyko; Khabipov, M.; Ortlepp, Thomas; Hagedorn, D.; Zorin, A. B.; Buchholz, Friedrich-Immanuel; Uhlmann, F. Hermann; Niemeyer, J.
Passive phase shifter for superconducting Josephson circuits. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 17.2007, 2, Pt. 1, S. 142-145

http://dx.doi.org/10.1109/TASC.2007.897382
Febvre, Pascal; Töpfer, Hannes; Ortlepp, Thomas; Ebert, Björn; Badi, Siham; Uhlmann, F. Hermann
Superconducting photosensitive interfaces for triggering RSFQ circuits. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 17.2007, 2, Pt. 1, S. 530-533

http://dx.doi.org/10.1109/TASC.2007.898682
Ortlepp, Thomas; Uhlmann, F. Hermann
Technology related timing jitter in superconducting electronics. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 17.2007, 2, Pt. 1, S. 534-537

http://dx.doi.org/10.1109/TASC.2007.901334
Dimov, Boyko; Ortlepp, Thomas; Uhlmann, F. Hermann
Phase-drop realization within RSFQ digital circuits with reduced Josephson current density. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 17.2007, 2, Pt. 1, S. 613-616

http://dx.doi.org/10.1109/TASC.2007.898556
Ortlepp, Thomas; ; Mielke, Olaf; Verwijs, C. J. M.; Foo, K. F. K.; Andreski, A.; Rogalla, H.; Uhlmann, F. Hermann; Hilgenkamp, H.
RSFQ circuitry using intrinsic [pi]-phase shifts. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 17.2007, 2, Pt. 1, S. 659-663

http://dx.doi.org/10.1109/TASC.2007.898635
Reich, Torsten; Ortlepp, Thomas; Uhlmann, F. Hermann
Analysis of a digital SQUID magnetometer utilizing a direct coupled DC SQUID for improved magnetic field resolution. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 17.2007, 2, Pt. 1, S. 746-749

http://dx.doi.org/10.1109/TASC.2007.898700
Konstantinovic, Miodrag; Schulze Lammers, Peter; Wöckel, Sebastian; Sachs, Jürgen
Detektion von Biomasse mit UWB-Radar : Ertragsbestimmung von Zuckerrüben. - In: Landtechnik. - Darmstadt : KTBL, ISSN 0023-8082, Bd. 61 (2006), 4, S. 192-193

Sachs, Jürgen;
DFG-Projekt: Radar für Ärzte. - In: Ilmenauer Uni-Nachrichten. - Ilmenau, Bd. 49 (2006), 5, S. 8

Ormeno, R. J.; Hein, Matthias A.; Barraclough, T. L.; Sibley, A.; Gough, C. E.; Mao, Z. Q.; Nishizaki, S.; Maeno, Y.
Electrodynamic response of Sr2RuO4. - In: Physical review. Condensed matter and materials physics / American Physical Society. - College Park, Md. : APS, 1970-2015 , ISSN: 1550-235X , ZDB-ID: 1473011-X, ISSN 1550-235X, Bd. 74 (2006), 9, S. 092504, insges. 4 S.

http://dx.doi.org/10.1103/PhysRevB.74.092504
Weber, Jörn; Volmer, Christian; Blau, Kurt; Stephan, Ralf; Hein, Matthias A.
Miniaturized antenna arrays using decoupling networks with realistic elements. - In: IEEE transactions on microwave theory and techniques : MTT ; a publication of the IEEE Microwave Theory and Techniques Society.. - New York, NY : IEEE, Bd. 54 (2006), 6, S. 2733-2740

http://dx.doi.org/10.1109/TMTT.2006.874874
Resagk, Christian; Men, Shouqiang; Ziolkowski, Marek; Kuilekov, Milko; Brauer, Hartmut
Magnetic field tomography on two electrically conducting fluids. - In: Measurement science and technology : devoted to the theory, practice and application of measurement in physics, chemistry, engineering and the environmental and life sciences from inception to commercial exploitation.. - Bristol : IOP Publ., ISSN 1361-6501, Bd. 17 (2006), 8, S. 2136-2140

A cylindrical cell containing GaInSn alloy and aqueous solution of KOH, a highly simplified aluminium reduction cell, is constructed. A direct current is applied to the cylindrical cell to generate the magnetic field. In a range of amplitude and frequency of vertical vibration, a stable, non-axisymmetric wave pattern is produced, and the displacement of the oscillating interface is measured by a digital camcorder. The perturbation of the magnetic field caused by the non-axisymmetric interface is measured by fluxgate sensors and processed by fast Fourier transforms. The measurements are consistent with forward calculations, and have been exploited to reconstruct the deformed interface by solving an inverse problem so as to develop magnetic field tomography to reconstruct an unknown interface between two electrically conducting fluids.



http://dx.doi.org/10.1088/0957-0233/17/8/012
Cimalla, Volker; Förster, Christian; Will, Florentina; Tonisch, Katja; Brückner, Klemens; Stephan, Ralf; Hein, Matthias; Ambacher, Oliver; Aperathitis, Elias
Pulsed mode operation of strained microelectromechanical resonators in air. - In: Applied physics letters. - Melville, NY : American Inst. of Physics, ISSN 1077-3118, Bd. 88 (2006), 25, S. 253501, insges. 3 S.

http://dx.doi.org/10.1063/1.2213950
Reich, Torsten; Ortlepp, Thomas; Uhlmann, F. Hermann
New approach for a highly sensitive magnetometer utilizing a multi-stage digital SQUID. - In: Superconductor science and technology : a multidisciplinary forum for workers involved in any aspect of the science and technology of superconductors.. - Bristol : IOP Publ., ISSN 1361-6668, Bd. 19.2006, 5, S. S276-S279

http://dx.doi.org/10.1088/0953-2048/19/5/S2
Ortlepp, Thomas; ; Mielke, Olaf; Verwijs, C. J. M.; Foo, K. F. K.; Rogalla, H.; Uhlmann, F. Hermann; Hilgenkamp, H.
Flip-flopping fractional flux quanta. - In: Science. - Washington, DC [u.a.] : American Association for the Advancement of Science, ISSN 1095-9203, Bd. 312 (2006), 5779, S. 1495-1497

The d-wave pairing symmetry in high-critical temperature superconductors makes it possible to realize superconducting rings with built-in pi phase shifts. Such rings have a twofold degenerate ground state that is characterized by the spontaneous generation of fractional magnetic flux quanta with either up or down polarity. We have incorporated pi phase-biased superconducting rings in a logic circuit, a flip-flop, in which the fractional flux polarity is controllably toggled by applying single flux quantum pulses at the input channel. The integration of pi rings into conventional rapid single flux quantum logic as natural two-state devices should alleviate the need for bias current lines, improve device symmetry, and enhance the operation margins.



http://dx.doi.org/10.1126/science.1126041
Dimov, Boyko; Todorov, Valery; Mladenov, Valery; Khabipov, M.; Balashov, D.; Hagedorn, D.; Buchholz, Friedrich-Immanuel; Niemeyer, J.; Uhlmann, F. Hermann
An improved technique for the design of Josephson transmission lines. - In: Superconductor science and technology : a multidisciplinary forum for workers involved in any aspect of the science and technology of superconductors.. - Bristol : IOP Publ., ISSN 1361-6668, Bd. 19.2006, 5, S. S213-S216

Recently, we have proposed a novel technique for the design of Josephson transmission lines (JTLs). According to our theoretical estimations, this technique ist able to increase the propagation speed of the JTLs and to reduce drastically their dc bias consumption. Here, a sucessful experimental verification of these estimations is presented.



http://dx.doi.org/10.1088/0953-2048/19/5/S10
Neundorf, Volker; Yakimchuk, Vera; Wagner, Edwin;
Webbasierte multimediale Lernumgebung GETsoft an der TU Ilmenau. - In: Ingenieur-Nachrichten. - Erfurt : DESOTRON Verlagsges., (2006), 1, S. 4-7

Konstantinovi´c, Miodrag; Veselinov, Branislav; Wöckel, Sebastian; Martinov, Milan; Schulze Lammers, Peter
Mogu´cnost za identifikaciju korena še´cerne repe u zemljištu pomo´cu radarskog senzora. - In: Savremena poljoprivredna tehnika. - Novi Sad, ISSN 0350-2953, Bd. 31 (2005), 3, S. 126-135

Süße, Roland; Domhardt, André; Reinhard, Marco;
Calculation of electrical circuits with fractional characteristics of construction elements. - In: Forschung im Ingenieurwesen : research journal.. - Berlin : Springer, ISSN 1434-0860, Bd. 69 (2005), 4, S. 230-235

http://dx.doi.org/10.1007/s10010-005-0007-z
Veselinovic, Nenad; Matsumoto, Tadashi; ,
Novel techniques to reduce performance sensitivity to spatial correlation and timing offset in space-time coded MIMO turbo equalization. - In: IEICE transactions. - Tokyo : IEICE, ISSN 1745-1345, Bd. E88-B.2005, 4, S. 1594-1601

http://dx.doi.org/10.1093/ietcom/e88-b.4.1594
Peri´c, Zoran H.; Stankovi´c, Veljko Lj.; Jovanovi´c, Aleksandra Z.; Bogosavljevi´c, Srdjan M.
Optimal piecewise uniform vector quantization of the memoryless Laplacian source. - In: Journal of electrical engineering. - Bratislava, ISSN 1335-3632, Bd. 56 (2005), 7/8, S. 200-204

Baggetta, Emanuele; Ebert, Björn; Hadacek, Nicolas; Villégier, Jean-Claude; Maignan, Michel
New design and implementation of a fast modulator in NbN technology. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 15.2005, 2, Pt. 1, S. 453-456

http://dx.doi.org/10.1109/TASC.2005.849872
Volf, Štefan; Krjuger, Udo; Šmidt, Franc
Primenenie vysokogo razrešenija v svetovych i zvetovych izmerenijach. - In: Svetotechnika. - Moskva : Gos&ptbov;energoizdat, ISSN 0039-7067, (2005), 5, S. 57-63

Šmidt, Franc;
Dinamičeskij metod izmerenija jarkosti na dorogach i v tunneljach. - In: Svetotechnika. - Moskva : Gos&ptbov;energoizdat, ISSN 0039-7067, (2005), 3, S. 13-16

Ziolkowski, Marek; Brauer, Hartmut; Kuilekov, Milko
Comparison of semi-analytical and FEM solutions in a certain magnetic fluid dynamics problem. - In: Compel : international journal of computation & mathematics in electrical & electronic engineering.. - Bradford : Emerald, ISSN 2054-5606, Bd. 24 (2005), 2, S. 418-426

http://dx.doi.org/10.1108/03321640510586051
Dimov, Boyko; Todorov, Valery; Mladenov, Valeri; Uhlmann, F. Hermann
RSFQ technique for generation of ultra-fast pulse chains having controlled and variable time-domain parameters. - In: WSEAS transactions on electronics. - Athens : WSEAS, ISSN 1109-9445, Bd. 2 (2005), 4, S. 208-212

Krüger, Udo; Schmidt, Franz; Wolf, Stefan
Applications of image resolved light and colour measurement. - In: Light & engineering. - Moscow : Znack Publ. House, ISSN 0236-2945, Bd. 13 (2005), 3, S. 66-75

Moderne CCD-Kameras können bei entsprechend sorgfältiger Kalibrierung Leuchtdichten messen. Durch ein angepasstes Filterdesign können auch bildauflösende Farbmesssysteme realisiert werden. Im Artikel werden die Grundlagen und Anwendungen vorgestellt.



Schmidt, Franz;
Dynamic luminance measurement on roads and in tunnels. - In: Light & engineering. - Moscow : Znack Publ. House, ISSN 0236-2945, Bd. 13 (2005), 2, S. 35-39

Wolf, Mike; Sachs, Jürgen; Zetik, Rudolf
UWB: Ultra-Breitband-Kommunikation. - In: TecChannel compact. - München : IDG-Business-Media, ISSN 2195-4747, (2005), 3, S. 136-150

Perpeet, M.; Hein, Matthias
Enhanced electron-phonon coupling of Ti-doped superconducting Nb3Sn films investigated at microwave frequencies. - In: Physical review. Condensed matter and materials physics / American Physical Society. - College Park, Md. : APS, 1970-2015 , ISSN: 1550-235X , ZDB-ID: 1473011-X, ISSN 1550-235X, Bd. 72 (2005), 9, S. 094502, insges. 8 S.

http://dx.doi.org/10.1103/PhysRevB.72.094502
Seron, D.; Oates, D. E.; Hammerl, G.; Mannhart, J.; Hirst, P. J.; Humphreys, R. G.; Anderson, A. C.; Hein, Matthias; Derov, J.
Linear and nonlinear microwave properties of Ca-doped YBa2Cu3O7-[delta] thin films. - In: Physical review. Condensed matter and materials physics / American Physical Society. - College Park, Md. : APS, 1970-2015 , ISSN: 1550-235X , ZDB-ID: 1473011-X, ISSN 1550-235X, Bd. 72 (2005), 10, S. 104511, insges. 11 S.

http://dx.doi.org/10.1103/PhysRevB.72.104511
Trautwein, Uwe; , ; ,
Measurement-based performance evaluation of advanced MIMO transceiver designs. - In: EURASIP journal on applied signal processing. - Akron, Ohio : Hindawi Publ., ISSN 1110-8657, (2005), 11, S. 1712-1724

http://dx.doi.org/10.1155/ASP.2005.1712
Kansanen, Kimmo; Schneider, Christian; Matsumoto, Tad; Thomä, Reiner
Multilevel-coded QAM with MIMO turbo-equalization in broadband single-carrier signaling. - In: IEEE transactions on vehicular technology : a publication of the IEEE Vehicular Technology Society.. - New York, NY : IEEE, ISSN 1939-9359, Bd. 54 (2005), 3, S. 954-966

http://dx.doi.org/10.1109/TVT.2005.844663
Wessely, Uwe; Eichner, Stefan; Scheller, Gunter
Digitale Wasserzeichen für Videodaten. - In: FKT. - Berlin : Schiele & Schön, ISSN 1430-9947, Bd. 59 (2005), 1/2, S. 13-22, insges. 8 S.

Dimov, Boyko; Khabipov, M.; Balashov, D.; Brandt, C. M.; Buchholz, Friedrich-Immanuel; Niemeyer, J.; Uhlmann, F. Hermann
An asynchronous rapid single-flux-quantum demultiplexer based on dual-rail information coding. - In: Superconductor science and technology : a multidisciplinary forum for workers involved in any aspect of the science and technology of superconductors.. - Bristol : IOP Publ., ISSN 1361-6668, Bd. 18 (2005), 5, S. 644-647

http://dx.doi.org/10.1088/0953-2048/18/5/011
Reich, Torsten; Ortlepp, Thomas; Uhlmann, F. Hermann; Febvre, Pascal
Experimental analysis of a digital SQUID device at 4.2 K. - In: Superconductor science and technology : a multidisciplinary forum for workers involved in any aspect of the science and technology of superconductors.. - Bristol : IOP Publ., ISSN 1361-6668, Bd. 18 (2005), 8, S. 1077-1081

http://dx.doi.org/10.1088/0953-2048/18/8/009
Ortlepp, Thomas; Uhlmann, F. Hermann
Noise induced timing jitter: a general restriction for high speed RSFQ devices. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 15 (2005), 2, S. 344-347

http://dx.doi.org/10.1109/TASC.2005.849830
Dimov, Boyko; Khabipov, M.; Balashov, D.; Brandt, C. M.; Buchholz, Friedrich-Immanuel; Niemeyer, J.; Uhlmann, F. Hermann
Tuning of the RSFQ gate speed by different Stewart-McCumber parameters of the Josephson junctions. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 15 (2005), 2, S. 284-287

http://dx.doi.org/10.1109/TASC.2005.849791
Dimov, Boyko; Khabipov, M.; Balashov, D.; Brandt, C. M.; Buchholz, Friedrich-Immanuel; Niemeyer, J.; Ortlepp, Thomas; Uhlmann, F. Hermann
Investigation of the parasitic coupling effects in densely packaged RSFQ digital circuits. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 15 (2005), 2, S. 396-399

http://dx.doi.org/10.1109/TASC.2005.849859
Roussy, A.; Karthikeyan, S.; Oomen, I.; Ortlepp, Thomas; Sujiono, E. H.; Brinkmann, A.; Rogalla, H.
HTS pulse-stretcher and second order modulator: design and first results. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 15 (2005), 2, S. 457-460

http://dx.doi.org/10.1109/TASC.2005.849873
Reich, Torsten; Ortlepp, Thomas; Uhlmann, F. Hermann
Digital SQUID sensor based on SFQ technique. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 15 (2005), 2, S. 304-307

http://dx.doi.org/10.1109/TASC.2005.849808
Trabert, Johannes F.; Hein, Matthias A.; Müller, Jens; Perrone, Rubén A.; Stephan, Ralf; Thust, Heiko
Low-temperature co-fired ceramic microwave switch matrix for satellite communications. - In: Annual report. - Ilmenau : Techn. Univ., (2004), S. 88-89

http://www.db-thueringen.de/servlets/DocumentServlet?id=7356
Spencer, Quentin H.; Swindlehurst, A. Lee; Haardt, Martin
Zero-forcing methods for downlink spatial multiplexing in multiuser MIMO channels. - In: IEEE transactions on signal processing : SP ; a publication of the IEEE Signal Processing Society.. - New York, NY : IEEE, Bd. 52 (2004), 2, S. 461-471

http://dx.doi.org/10.1109/TSP.2003.821107
Spencer, Quentin H.; Peel, Christian B.; Swindlehurst, A. Lee; Haardt, Martin;
An introduction to the multi-user MIMO downlink. - In: IEEE communications magazine. - New York, NY : IEEE, ISSN 1558-1896, Bd. 42 (2004), 10, S. 60-67

http://dx.doi.org/10.1109/MCOM.2004.1341262
Alexiou, Angeliki; Haardt, Martin;
Smart antenna technologies for future wireless systems: trends and challenges. - In: IEEE communications magazine. - New York, NY : IEEE, ISSN 1558-1896, Bd. 42 (2004), 9, S. 90-97

http://dx.doi.org/10.1109/MCOM.2004.1336725
Zwick, Thomas; Hampicke, Dirk; Richter, Andreas; Sommerkorn, Gerd; Thomä, Reiner; Wiesbeck, Werner
A novel antenna concept for double-directional channel measurements. - In: IEEE transactions on vehicular technology : a publication of the IEEE Vehicular Technology Society.. - New York, NY : IEEE, ISSN 1939-9359, Bd. 53 (2004), 2, S. 527-537

http://dx.doi.org/10.1109/TVT.2004.823529
Eichner, Stefan; Scheller, Gunter; Wessely, Uwe
Wavelet-temporal basierte Rauschreduktion von Filmsequenzen. - In: FKT. - Berlin : Schiele & Schön, ISSN 1430-9947, Bd. 58 (2004), 11, S. 541-549

Dimov, Boyko; Todorov, Valery; Mladenov, Valeri; Uhlmann, F. Hermann
Optimal signal propagation speed of a Josephson transmission line. - In: Superconductor science and technology : a multidisciplinary forum for workers involved in any aspect of the science and technology of superconductors.. - Bristol : IOP Publ., ISSN 1361-6668, Bd. 17 (2004), 6, S. 819-822

http://dx.doi.org/10.1088/0953-2048/17/6/015
Ortlepp, Thomas; Uhlmann, F. Hermann
Noise analysis for intrinsic and external shunted Josephson junctions. - In: Superconductor science and technology : a multidisciplinary forum for workers involved in any aspect of the science and technology of superconductors.. - Bristol : IOP Publ., ISSN 1361-6668, Bd. 17 (2004), 5, S. 112-116

http://dx.doi.org/10.1088/0953-2048/17/5/004
Dimov, Boyko; Todorov, Valery; Mladenov, Valeri; Uhlmann, F. Hermann
The Josephson transmission line as an impedance matching circuit. - In: WSEAS transactions on circuits and systems. - Athens : WSEAS, ISSN 1109-2734, Bd. 3 (2004), 5, S. 1341-1346

Dimov, Boyko; Todorov, Valery; Mladenov, Valeri; Uhlmann, F. Hermann
Possible connections of the Josephson junctions within the RSFQ logic circuits. - In: WSEAS transactions on circuits and systems. - Athens : WSEAS, ISSN 1109-2734, Bd. 3 (2004), 5, S. 1398-1402

Men, Shouqiang; Resagk, Christian; Ziolkowski, Marek; Kuilekov, Milko; Brauer, Hartmut
Measurement of magnetic flux density on a rotating distorted electrolyte-metal interface. - In: Measurement science and technology : devoted to the theory, practice and application of measurement in physics, chemistry, engineering and the environmental and life sciences from inception to commercial exploitation.. - Bristol : IOP Publ., ISSN 1361-6501, Bd. 15 (2004), 7, S. 1323-1326

http://www.iop.org/EJ/abstract/0957-0233/15/7/014
Brauer, Hartmut; Ziolkowski, Marek; Kuilekov, Milko; Men, Shouqiang; Resagk, Christian
Surface current reconstruction using magnetic field tomography. - In: IEEE transactions on magnetics : a publication of the IEEE Magnetics Society.. - New York, NY : IEEE, ISSN 1941-0069, Bd. 40 (2004), 2, S. 1398-1401

http://dx.doi.org/10.1109/TMAG.2004.824903
Ziolkowski, Marek; Brauer, Hartmut; Kuilekov, Milko; Men, Shouqiang; Resagk, Christian
Interface reconstruction between two conducting fluids applying. - In: IEEE transactions on magnetics : a publication of the IEEE Magnetics Society.. - New York, NY : IEEE, ISSN 1941-0069, Bd. 40 (2004), 2, S. 1248-1251

http://dx.doi.org/10.1109/TMAG.2004.824776
Del Galdo, Giovanni; Haardt, Martin; Schneider, Christian;
Geometry-based channel modelling of MIMO channels in comparison with channel sounder measurements. - In: Advances in radio science : Kleinheubacher Berichte.. - Göttingen : Copernicus Publications, ISSN 1684-9973, Bd. 2 (2004), S. 117-126

http://dx.doi.org/10.5194/ars-2-117-2004
Süße, Roland; Civelek, Cem;
Analysis of engineering systems by means of Lagrange and Hamilton formalisms depending on contravariant, covariant tensorial variables. - In: Forschung im Ingenieurwesen : research journal.. - Berlin : Springer, ISSN 1434-0860, Bd. 68 (2003), 1, S. 66-74

http://dx.doi.org/10.1007/s10010-003-0102-y
Ziolkowski, Marek; Brauer, Hartmut; Kuilekov, Milko;
Interface identification in magnetic fluid dynamics. - In: Serbian journal of electrical engineering. - Čačak : Univ., ISSN 2217-7183, Bd. 1 (2003), 1, S. 61-69

https://doi.org/10.2298/SJEE0301061Z
Kuilekov, Milko; Ziolkowski, Marek; Brauer, Hartmut;
Application of genetic algorithms to an inverse field problem in magnetic dynamics. - In: Serbian journal of electrical engineering. - Čačak : Univ., ISSN 2217-7183, Bd. 1 (2003), 1, S. 1-13

https://doi.org/10.2298/SJEE0301001K
Brauer, Hartmut; Kuilekov, Milko
A practical course for teaching fundamental optimization techniques in electrical engineering. - In: Przeglad elektrotechniczny. - Warszawa : Wydawn. Not Sigma, ISSN 0033-2097, Bd. 79 (2003), 10, S. 690-692

Neundorf, Volker; Wagner, Edwin
Multimedia learning environment for principles of electrical engineering GETsoft. - In: Przeglad elektrotechniczny. - Warszawa : Wydawn. Not Sigma, ISSN 0033-2097, Bd. 79 (2003), 10, S. 761-763

Haardt, Martin; Spencer, Quentin
Smart antennas for wireless communications beyond the third generation. - In: Computer communications : the international journal for the computer and telecommunications industry.. - Amsterdam [u.a.] : Elsevier Science, ISSN 0140-3664, Bd. 26 (2003), 1, S. 41-45

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Effects of ion milling on the microwave properties of MgB2/films. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 13.2003, 2, Pt. 3, S. 3585-3589

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Intermodulation distortion and third-harmonic generation in YBCO films of varying oxygen content. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 13.2003, 2, Pt. 1, S. 311-314

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HTS multilayer technology for optimal bit-error rate RSFQ cells. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 13 (2003), 2, S. 409-412

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Bit error rate determination of RSFQ logic cells by means of noise analysis of basic network components. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 13 (2003), 2, S. 515-518

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Design issues for interconnects in densely packaged RSFQ structures. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 13 (2003), 2, S. 498-501

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Nonlinear microwave response of epitaxial YBaCuO films of varying oxygen content on MgO substrates. - In: Journal of superconductivity : incorporating novel magnetism.. - Dordrecht [u.a.] : Springer Science + Business Media B.V., ISSN 1572-9605, Bd. 16 (2003), 5, S. 895-904

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New optimized elements for the rapid single-flux quantum shift register family. - In: Superconductor science and technology : a multidisciplinary forum for workers involved in any aspect of the science and technology of superconductors.. - Bristol : IOP Publ., ISSN 1361-6668, Bd. 16 (2003), 10, S. 1212-1215

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Note on cospectral graphs with simple eigenvalues. - In: Match. - Kragujevac : Univ. [u.a.], ISSN 0340-6253, Bd. 48 (2003), S. 49-53

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Forward simulations for free boundary reconstruction in magnetic fluid dynamics. - In: Compel. - Bradford [u.a.] : MCB Univ. Press, ISSN 0332-1649, Bd. 22 (2003), 3, S. 674-688

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Short-range wireless infrared transmission: the link budget compared to RF. - In: IEEE wireless communications. - New York, NY : IEEE, ISSN 15361284, Bd. 10 (2003), 2, S. 8-14

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Influence of discontinuous transmission and power control on the average SIR and the outage probability of the uplink of CDMA systems. - In: Wireless personal communications : an international journal.. - Dordrecht [u.a.] : Springer Science + Business Media B.V, ISSN 1572-834X, Bd. 20 (2002), 3, S. 285-303

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Capacity of MIMO systems based on measured wireless channels. - In: IEEE journal on selected areas in communications : J-SAC ; a publication of the IEEE Communications Society.. - New York, NY : IEEE, Bd. 20 (2002), 3, S. 561-569

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Integrierte Ultra-Breitband-Elektronik für Feuchte- und Flüssigkeitssensoren. - In: Technisches Messen : tm ; Sensoren, Geräte, Systeme ; Organ des AMA Fachverbands für Sensorik e.V. und der NAMUR, Normenarbeitsgemeinschaft für Mess- und Regelungstechnik der Chemischen Industrie.. - Berlin : De Gruyter, ISSN 2196-7113, Bd. 69 (2002), 1, S. 25-31

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Febvre, Pascal; Töpfer, Hannes; Ortlepp, Thomas; Kidiyarova-Shevchenko, A.; Gerritsma, G. J.
Comparative study of rapid-single-flux-quantum devices based on low-, medium- and high-Tc technologies. - In: Superconductor science and technology : a multidisciplinary forum for workers involved in any aspect of the science and technology of superconductors.. - Bristol : IOP Publ., ISSN 1361-6668, Bd. 15 (2002), 6, S. 952-955

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Postprocessing of 3-D current density reconstruction results with equivalent ellipsoids. - In: IEEE transactions on biomedical engineering : a publication of the IEEE Engineering in Medicine and Biology Society.. - New York, NY : IEEE, ISSN 1558-2531, Bd. 49 (2002), 11, S. 1379-1384

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Verification of extended sources reconstruction techniques using a torso phantom. - In: Compel : international journal of computation & mathematics in electrical & electronic engineering.. - Bradford : Emerald, ISSN 2054-5606, Bd. 20 (2001), 2, S. 595-606

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Evaluation of inverse field solutions with biomedical applications. - In: Compel : international journal of computation & mathematics in electrical & electronic engineering.. - Bradford : Emerald, ISSN 2054-5606, Bd. 20 (2001), 3, S. 665-675

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Die Zukunft mobiler Funknetze: jenseits von 3G. - In: NetworkWorld Germany. - München : Computerwoche-Verl., ISSN 1438-7891, Bd. 3 (2001), 12, S. 18-19

Ortlepp, Thomas; Töpfer, Hannes; Uhlmann, Hermann F.
Effects of a 20 K operation on the bit-error rates of a prospective MgB 2 based digital circuit. - In: Superconductor science and technology : a multidisciplinary forum for workers involved in any aspect of the science and technology of superconductors.. - Bristol : IOP Publ., ISSN 1361-6668, Bd. 14.2001, 8, S. L37-L39

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Minimization of noise-induced bit error rate in a high Tc superconducting dc/single flux quantum converter. - In: Applied physics letters. - Melville, NY : American Inst. of Physics, ISSN 1077-3118, Bd. 78 (2001), 9, S. 1279-1281

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Statistical modeling of inductances in high-Tc superconductor electronic structures. - In: Physica. - Amsterdam : North-Holland Physics Publ., ISSN 0921-4534, Bd. 350 (2001), 3/4, S. 201-214

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A new approach for analysis of on-chip interconnections in integrated Josephson junction logic schemes. - In: Superconductor science and technology : a multidisciplinary forum for workers involved in any aspect of the science and technology of superconductors.. - Bristol : IOP Publ., ISSN 1361-6668, Bd. 14 (2001), 9, S. 775-782

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Ortlepp, Thomas; Töpfer, Hannes; Uhlmann, F. Hermann
A general approach for determining the switching probability in rapid single flux quantum logic circuits. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 11 (2001), 1, S. 280-283

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Dimov, Boyko; Töpfer, Hannes; Uhlmann, F. Hermann
Analysis of electromagnetic coupling effects in integrated Josephson junction logic devices by the FDTD technique. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 11 (2001), 1, S. 1102-1105

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Review of Viterbi's model estimating the capacity of cdma based mobile systems. - In: IEICE transactions. - Tokyo : IEICE, ISSN 0916-8516, Bd. 84 (2001), 12, S. 3212-3217

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Automatische Metadatenextraktion im Studio. - In: FKT. - Berlin : Schiele & Schön, ISSN 1430-9947, Bd. 55 (2001), 12, S. 745-748

Thomä, Reiner S.; Hampicke, Dirk; Richter, Andreas; Sommerkorn, Gerd; Trautwein, Uwe
MIMO vector channel sounder measurement for smart antenna system evaluation. - In: European transactions on telecommunications. - Chichester [u.a.] : Wiley, ISSN 1124-318X, Bd. 12 (2001), 5, S. 427-438

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Smart antennas for UTRA TDD. - In: European transactions on telecommunications. - Chichester [u.a.] : Wiley, ISSN 1124-318X, Bd. 12 (2001), 5, S. 393-406

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Initial lessons learned in level planning for mixed signal transmission in CATV networks. - In: IEEE transactions on consumer electronics : CE ; a publication by the IEEE Consumer Electronics Society.. - New York, NY : IEEE, ISSN 1558-4127, Bd. 46 (2000), 2, S. 353-357

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Handover-Verkehr und sein Einfluß auf die Blockierungswahrscheinlichkeit zellularer Mobilfunksysteme. - In: Frequenz : journal of RF-engineering and telecommunications.. - Berlin : De Gruyter, ISSN 2191-6349, Bd. 54 (2000), 9/10, S. 211-224

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Identification of time-variant directional mobile radio channels. - In: IEEE transactions on instrumentation and measurement : IM ; a publication of the Instrumentation and Measurement Society.. - New York, NY : IEEE, Bd. 49 (2000), 2, S. 357-364

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Restrictions of the voice activity gain and consequences for CDMA based mobile communication systems. - In: AEÜ. - München : Elsevier, Urban & Fischer, ISSN 1434-8411, Bd. 54 (2000), 1, S. 51-58

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Analytical gain estimation using voice activity detectors. - In: Journal of electrical engineering. - Bratislava, ISSN 1335-3632, Bd. 51 (2000), 1/2, S. 48-50

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Requirements for DAB cable-type receiver. - In: IEEE transactions on consumer electronics : CE ; a publication by the IEEE Consumer Electronics Society.. - New York, NY : IEEE, ISSN 1558-4127, Bd. 45 (1999), 2, S. 449-454

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Optimization of via connections between transmission lines in multilayer LTCC-modules. - In: Advancing microelectronics. - Reston, Va : IMAPS, Bd. 26 (1999), 4, S. 19-23

Knoll, Mario; Uhlmann, F. Hermann
Design investigation of 1D-arrays of metallic single electron tunneling transistors. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 9 (1999), 2, S. 4265-4268

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Numerical studies of interchip pulse transmission for complex RSFQ systems. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 9 (1999), 2, S. 3725-3728

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Il'ichev, E.; Zakosarenko, V.; Ijsselsteijn, R. P. J.; Schultze, V.; Meyer, Hans-Georg; Hönig, H. E.; Töpfer, Hannes
The current-phase relation in high-Tc YBaCuO Josephson junctions. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 9 (1999), 2, S. 3994-3997

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Multichannel magnetocardiographic measurements with a physical thorax phantom. - In: Medical & biological engineering & computing. - [S.l.], ISSN 1741-0444, Bd. 37 (1999), 1, S. 2-7

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Source localization in an inhomogeneous physical thorax phantom. - In: Physics in medicine and biology : an official journal of the Institute of Physics and Engineering in Medicine.. - Bristol : IOP Publ., ISSN 1361-6560, Bd. 44 (1999), 8, S. 1969-1981

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Richtungsaufgelöste Messung und Modellierung von Mobilfunkkanälen. - In: NTZ. - Berlin : VDE-Verl., ISSN 0948-728X, Bd. 52 (1999), 5, S. 56-59

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Model scenarios for direction-selective adaptive antennas in cellular mobile communication systems - scanning the literature. - In: Wireless personal communications : an international journal.. - Dordrecht [u.a.] : Springer Science + Business Media B.V, ISSN 1572-834X, Bd. 11 (1999), 1, S. 109-129

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Beamforming with circular antenna-arrays for indoor mobile communication systems. - In: Journal of electrical engineering. - Bratislava, ISSN 1335-3632, Bd. 50 (1999), 5/6, S. 134-136

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Infrarot-Schnittstelle für ein drahtloses Multimedia-Netzwerk. - In: Beiträge aus dem wissenschaftlichen Leben. - Ilmenau : Univ., Bd. 3 (1999), S. 33-35

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Limits of sectorisation gain caused by mobility and soft handoff. - In: Electronics letters. - Stevenage : IET, ISSN 0013-5194, Bd. 35 (1999), 2, S. 119-120

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Experimental digital SQUID with integrated feedback circuit. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 7 (1997), 2, S. 2747-2751

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Hildebrandt, Günter; Uhlmann, F. Hermann
Design and analysis of high-Tc SQUID current amplifiers. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 7 (1997), 2, S. 3481-3484

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Kaplunenko, V. K.; Stepantsov, E. A.; Yi, H. R.; Claeson, T.; Töpfer, Hannes; Hildebrandt, Günter; Uhlmann, F. Hermann; Wikborg, E.
Single flux quantum elements based on a single-layer of a high-Tc superconductor. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 7 (1997), 2, S. 3176-3180

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Töpfer, Hannes; Harnisch, Torsten; Kunert, Jürgen; Lange, Steffen; Uhlmann, F. Hermann
Formal description of the functional behavior of RSFQ logic circuits for design and optimization purposes. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 7 (1997), 2, S. 3630-3633

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Knoll, Mario; Uhlmann, F. Hermann; Götz, Martin; Krech, Wolfram
Modeling and analysis of capacitances in metallic single electron tunneling structures. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 7 (1997), 2, S. 3524-3527

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Harnisch, Torsten; Kunert, Jürgen; Töpfer, Hannes; Uhlmann, F. Hermann
Design centering methods for yield optimization of cryoelectronic circuits. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 7 (1997), 2, S. 3434-3437

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Yield optimization of a RSFQ voltage doubler. - In: Journal of low temperature physics. - Dordrecht : Springer Science + Business Media B.V., ISSN 1573-7357, Bd. 106 (1997), 3/4, S. 521-526

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Modellbildung zur Untersuchung des dynamischen Verhaltens von Ozonisatorsystemen. - In: Elektrie. - Berlin : Print Medien Dienst, ISSN 0013-5399, Bd. 51 (1997), 11/12, S. 437-442

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Algorithm for construction of (0,1)-matrix codes. - In: Electronics letters. - London : Institution, ISSN 1350-911X, Bd. 33 (1997), 3, S. 227-229

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A statistical Kapron model for simulation of polarisation noise in single-mode fibers based on measured parameters. - In: Journal of optical communications. - Berlin : De Gruyter, ISSN 0173-4911, Bd. 18 (1997), 6, S. 228-234

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Algorithm for construction of (0,1)-matrix codes. - In: Electronics letters. - Stevenage : IET, ISSN 0013-5194, Bd. 33 (1997), 3, S. 227-229

Haueisen, Jens; Hafner, Christian; Nowak, Hannes; Brauer, Hartmut;
Neuromagnetic field computation using the multiple multipole method. - In: International journal of numerical modelling : electronic networks, devices and fields.. - Chichester [u.a.] : Wiley, ISSN 1099-1204, Bd. 9 (1996), 1/2, S. 145-158

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First steps towards a high-T c SQUID amplifier. - In: Applied superconductivity. - Amsterdam [u.a.] : Elsevier Science, ISSN 0964-1807, Bd. 4 (1996), 9, S. 375-384

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"Analytisches Spektrum" und einseitige Transformation. - In: Frequenz : journal of RF-engineering and telecommunications.. - Berlin : De Gruyter, ISSN 2191-6349, Bd. 50 (1996), 3/4, S. 49-50

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Hildebrandt, Günter; Uhlmann, F. Hermann; Daalmans, Gabriel M.; Bömmel, Franz R.
A novel approach in calculating V-I curves of a DC-SQUID coupled to a planar input coil. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 6 (1996), 1, S. 19-23

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Analysis of the probability density of the detection signal in an optical coherent system from measurement results using DFB laser diodes. - In: Microwave and optical technology letters. - New York, NY [u.a.] : Wiley, ISSN 1098-2760, Bd. 10 (1995), 3, S. 141-144

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Finger, Lutz; Uhlmann, Hermann F.
Analysis of non-linear dynamical circuits and systems under the influence of thermal noise. - In: International journal of circuit theory and applications. - New York, NY [u.a.] : Wiley, ISSN 1097-007X, Bd. 23 (1995), 2, S. 147-159

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Anwendung der Momentenmethode zur Analyse von optischen Überlagerungssystemen. - In: Frequenz : journal of RF-engineering and telecommunications.. - Berlin : De Gruyter, ISSN 2191-6349, Bd. 49 (1995), 7/8, S. 161-166

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Hildebrandt, Günter; Uhlmann, F. Hermann
Inductance calculation for integrated superconducting structures by minimizing free energy. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 5 (1995), 2, S. 2766-2769

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Modeling of an ADC based on high-Tc QOJS comparators. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 5 (1995), 2, S. 2628-2631

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Töpfer, Hannes; Uhlmann, F. Hermann; Knoll, Mario; Thiele, Henning; Selent, Mirko
Design tools for parameter determination and simulation of integrated Josephson structures. - In: IEEE transactions on applied superconductivity : a publication of the IEEE Superconductivity Committee.. - New York, NY : IEEE, ISSN 1558-2515, Bd. 5 (1995), 2, S. 3345-3348

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Zur numerischen Analyse digitaler optischer Heterodynempfänger. - In: Nachrichtentechnik, Elektronik. - Berlin : Verl. Technik, Bd. 45 (1995), 6, S. 89-92

Geipl, Michael; Vogel, Veit; Rink, Wolfram
PLATINUM - ein B-ISDN-Test- und Demonstrationsprojekt. - In: Nachrichtentechnik, Elektronik. - Berlin : Verl. Technik, Bd. 45 (1995), 6, S. 86-88

Zühlke, Werner; Metz, Ulrich; Schran, Karl; Navratil, Jiri
Arhythmische Segmentierung in der Spracherkennung. - In: Nachrichtentechnik, Elektronik. - Berlin : Verl. Technik, Bd. 45 (1995), 6, S. 83-85

Tosse, Ralf;
Performance-Messungen zu Zeichenabgabeprotokollen des zukünftigen Breitband-ISDN. - In: Nachrichtentechnik, Elektronik. - Berlin : Verl. Technik, Bd. 45 (1995), 5, S. 80-82

Hinkov, I.; Hinkov, V.; Iversen, Kay; Ziemann, Olaf
Feasibility of optical CDMA using spectral encoding by acoustically tunable optical filters. - In: Electronics letters. - London : Institution, ISSN 1350-911X, Bd. 31 (1995), 5, S. 384-386

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Optisches CDMA : Systeme und Sequenzen. - In: Nachrichtentechnik, Elektronik. - Berlin : Verl. Technik, Bd. 45 (1995), 5, S. 76-79

Iversen, Kay; Junghanns, Dirk
On the combination of optical CDMA and POLSK. - In: Journal of optical communications. - Berlin : De Gruyter, ISSN 0173-4911, Bd. 16 (1995), 4, S. 126-130

Töpfer, Hannes; Mäder, Gero; Uhlmann, F. Hermann
Accurate calculation of capacitances of grain boundary Josephson junctions in high critical temperature superconductors. - In: Journal of applied physics : AIP's archival journal for significant new results in applied physics.. - Melville, NY : American Inst. of Physics, ISSN 1089-7550, Bd. 77 (1995), 9, S. 4576-4579

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Codemultiplex in der optischen Nachrichtentechnik. - In: Nachrichtentechnik, Elektronik. - Berlin : Verl. Technik, Bd. 45 (1995), 3, S. 29-35

Finger, Lutz; Uhlmann, Hermann;
Effective computation of the Poincaré map for the analysis of nonlinear dynamic circuits/systems using Runge-Kutta triples. - In: Journal of circuits, systems, and computers : JCSC.. - Singapore [u.a.] : World Scientific, ISSN 1793-6454, Bd. 4 (1994), 1, S. 93-98

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Finger, Lutz; Uhlmann, F. Hermann;
Analysis of the nonlinear phenomena in a superconducting double-loop interferometer circuit. - In: Journal of circuits, systems, and computers : JCSC.. - Singapore [u.a.] : World Scientific, ISSN 1793-6454, Bd. 4 (1994), 3, S. 279-294

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All-electrical simulation of an optical FSK-system including phase and thermal noise. - In: Electronics letters. - Stevenage : IET, ISSN 0013-5194, Bd. 30 (1994), 21, S. 1779-1780

Dietzel, Ralf; Ziemann, Olaf
Elektrische Testmöglichkeit für optische Überlagungsempfänger. - In: Nachrichtentechnik, Elektronik. - Berlin : Verl. Technik, Bd. 44 (1994), 5, S. 73-76

Fuchs, Günter;
Innovative Sprünge in der Hörfunktechnik. - In: Beiträge aus dem wissenschaftlichen Leben. - Ilmenau : Univ., Bd. 1 (1994), S. 16-25

Bornkessel, Christian; Wiesbeck, Werner; Uhlmann, Hermann
Optimierung von Absorberkammern und EMV-Meßverfahren im unteren MHz-Bereich. - In: EMV journal. - Coburg : Sprechsaal Publ. Group, ISSN 0945-3857, Bd. 3 (1992), 4, S. 248-253

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[Rezension von: Bourne, Donald E.; Kendall, Peter C., Vektoranalysis, mit 251 Aufgaben und zahlreichen Beispielen]. - In: Ilmenauer Hochschulblatt. - Ilmenau, 10, S. 8
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[Rezension von: Coding theory, the essentials, D. G. Hoffman ...]. - In: Ilmenauer Hochschulblatt. - Ilmenau, 9, S. 8
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Selent, Reiner;
Speicherverwaltung von Zeichenketten : Tips für C. - In: MP. - Berlin : Verl. Technik, ISSN 0233-2892, Bd. 5 (1991), 7, S. 39-41

Zühlke, Werner;
Arhythmische Signalverarbeitung und -übertragung. - In: Frequenz : journal of RF-engineering and telecommunications.. - Berlin : De Gruyter, ISSN 2191-6349, Bd. 45 (1991), 1/2, S. 45-50

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Verwiebe, Frank; Töpfer, Hannes
3d-Kapazitäts- und Induktivitätsberechnung für supraleitende Strukturen. - In: Wissenschaftliche Zeitschrift. - Ilmenau : Technische Hochschule, ISSN 0043-6917, Bd. 37 (1991), 4, S. 215-224

Wagner, Edwin; Bretschneider, Martin; Schindhelm, Frank
Simulation des Abgleichverhaltens von Wechselstrommeßbrücken. - In: Wissenschaftliche Zeitschrift. - Ilmenau : Technische Hochschule, ISSN 0043-6917, Bd. 37 (1991), 3, S. 213-226

Verwiebe, Frank; Uhlmann, Hermann
Widerstandsberechnung von Layoutstrukturen in integrierten Schaltkreisen mit der Methode der Knotenelimination in Finite Elemente- und Finite Box Diskretisierungen. - In: Wissenschaftliche Zeitschrift. - Ilmenau : Technische Hochschule, ISSN 0043-6917, Bd. 37 (1991), 3, S. 201-212

Uhlmann, Hermann; Teske, Jörg
Zur Anwendung der Poincaré-Halbabbildung in der globalen Analyse des nichtlinearen rückgekoppelten T-Brückenoszillators (Teil II). - In: Wissenschaftliche Zeitschrift. - Ilmenau : Technische Hochschule, ISSN 0043-6917, Bd. 37 (1991), 2, S. 91-100

Uhlmann, Hermann; Teske, Jörg
Zur Anwendung der Poincaré-Halbabbildung in der globalen Analyse des nichtlinearen rückgekoppelten T-Brückenoszillators (Teil I). - In: Wissenschaftliche Zeitschrift. - Ilmenau : Technische Hochschule, ISSN 0043-6917, Bd. 37 (1991), 2, S. 81-89

Tosse, Ralf;
Peripherieschaltkreise der Mikrorechentechnik - ein Praktikumsversuch für die Ausbildung. - In: Wissenschaftliche Zeitschrift. - Ilmenau : Technische Hochschule, ISSN 0043-6917, Bd. 37 (1991), 2, S. 71-80

Süße, Roland; Enge, Rainer
Synthese elektromechanischer Systeme Teil III: Synthesemodelle ein- bzw. zweidimensionaler Strahlablenksysteme. - In: Wissenschaftliche Zeitschrift. - Ilmenau : Technische Hochschule, ISSN 0043-6917, Bd. 37 (1991), 2, S. 59-70

Ehrhardt, Frank;
Simulation nichtlinearer Netzwerke im Frequenzbereich. - In: Wissenschaftliche Zeitschrift. - Ilmenau : Technische Hochschule, ISSN 0043-6917, Bd. 37 (1991), 2, S. 41-48

Al-Houri, Mohammed;
Diagrammschwenkung einer Antenne mit Hilfe eines biegsamen Rillen-Hohlleiters. - In: Wissenschaftliche Zeitschrift. - Ilmenau : Technische Hochschule, ISSN 0043-6917, Bd. 37 (1991), 2, S. 35-39

Abdin, Sader;
Untersuchungen an einer planaren Mikrostrip-Empfangsantenne mit elektronischer Diagrammschwenkung. - In: Wissenschaftliche Zeitschrift. - Ilmenau : Technische Hochschule, ISSN 0043-6917, Bd. 37 (1991), 2, S. 25-33

Abdin, Sader;
Entwurf, Aufbau und Erprobung eines steuerbaren Gegentaktverstärkers in Streifenleitungstechnik bei einer Frequenz f= 1,75 GHz. - In: Wissenschaftliche Zeitschrift. - Ilmenau : Technische Hochschule, ISSN 0043-6917, Bd. 37 (1991), 2, S. 17-23

Kreß, Dieter;
[Rezension von: Thomas, John B., An introduction to communication theory and systems]. - In: Messen, Steuern, Regeln. - München : Oldenbourg, ISSN 0026-0347, 5, S. 234-235
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Kreß, Dieter;
[Rezension von: Franz, Jürgen, Optische Übertragungssysteme mit Überlagerungsempfang, Berechnung, Optimierung, Vergleich]. - In: Nachrichtentechnik, Elektronik. - Berlin : Verl. Technik, ISSN 0323-4657, 10, S. 391
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Kreß, Dieter;
[Rezension von: Topics in non-Gaussian signal processing, Edward J. Wegman ... eds]. - In: Nachrichtentechnik, Elektronik. - Berlin : Verl. Technik, ISSN 0323-4657, 6, S. 237-238
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Kreß, Dieter;
[Rezension von: Schüßler, Hans Wilhelm, Netzwerke, Signale und Systeme, Bd. 1, Systemtheorie linearer elektrischer Netzwerke]. - In: Nachrichtentechnik, Elektronik. - Berlin : Verl. Technik, ISSN 0323-4657, 1, S. 38
, Rezension von : Netzwerke, Signale und Systeme ; Bd. 1:Systemtheorie linearer elektrischer Netzwerke / Schüßler, Hans Wilhelm *1928-2007*. - 2., neubearb. und erw. Aufl. - Berlin [u.a.] : Springer, 1988
Müller, Renate;
Analiz i sintez cepej s raspredelennymi parametrami s pomošč&softcy;ju operatora &worte;r. - In: Wissenschaftliche Zeitschrift. - Ilmenau : Technische Hochschule, ISSN 0043-6917, Bd. 36 (1990), 1, S. 99-106

Uhlmann, Hermann; Uhlig, Jürgen
Rechnergestützte dynamische Analyse von DC-SQUID's unter Einbeziehung parasitärer Elemente. - In: Wissenschaftliche Zeitschrift. - Ilmenau : Technische Hochschule, ISSN 0043-6917, Bd. 36 (1990), 2, S. 115-126

Müller, Renate;
Der Einfluß der nichtlinearen Kapazität auf den Slow-Wave-Typ auf Mikrostreifenleitungen. - In: Wissenschaftliche Zeitschrift. - Ilmenau : Technische Hochschule, ISSN 0043-6917, Bd. 36 (1990), 5, S. 77-84

Tanzke, Rüdiger; Ballhorn, Ralph; Kaiser, Frank
Simulation digitaler Netzwerke auf einem Personalcomputer. - In: Wissenschaftliche Zeitschrift. - Ilmenau : Technische Hochschule, ISSN 0043-6917, Bd. 36 (1990), 4, S. 117-120

Tanzke, Sonja;
Ein Beitrag der periodischen Lösung in stark nichtlinaren selbsterregten Netzwerken. - In: Wissenschaftliche Zeitschrift. - Ilmenau : Technische Hochschule, ISSN 0043-6917, Bd. 36 (1990), 4, S. 107-116

Müller, Renate; Tanzke, Rüdiger
Rechnergestütztes Messen magnetischer Größen. - In: Wissenschaftliche Zeitschrift. - Ilmenau : Technische Hochschule, ISSN 0043-6917, Bd. 36 (1990), 4, S. 99-106

Linnemann, Gerhard; Süße, Roland
Synthese elektromechanischer Systeme : Teil II: Beitrag zur Theorie elektromechanischer Elemente höherer Ordnung. - In: Wissenschaftliche Zeitschrift. - Ilmenau : Technische Hochschule, ISSN 0043-6917, Bd. 36 (1990), 4, S. 85-92

Philippow, Eugen; Büntig, Wolfgang; Vogt, Werner
Ein numerisches Transformationsverfahren für Relaxationsschwingungen. - In: Wissenschaftliche Zeitschrift. - Ilmenau : Technische Hochschule, ISSN 0043-6917, Bd. 36 (1990), 4, S. 63-71

Barth, Andrej; Manalebih, Neway
Untersuchungen zum chaotischen Verhalten an ein- und zweidimensionalen Rekursionsgleichungen. - In: Wissenschaftliche Zeitschrift. - Ilmenau : Technische Hochschule, ISSN 0043-6917, Bd. 36 (1990), 1, S. 73-89

Rink, Wolfram;
Intelligent Networks. - In: Nachrichtentechnik, Elektronik. - Berlin : Verl. Technik, ISSN 0323-4657, Bd. 40 (1990), 5, S. 162-165