http://www.tu-ilmenau.de

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Drahtlose Verteilsysteme /
Digitaler Rundfunk


headerphoto Drahtlose Verteilsysteme /<br />Digitaler Rundfunk
Ansprechpartner

Prof. Dr. Giovanni Del Galdo

Fachgebietsleiter

Telefon +49 3677 69-4281

E-Mail senden


INHALTE

Dr.-Ing. Florian Römer

Wissenschaftlicher Mitarbeiter

Kontakt:

Telefon: +49 3677 69-4286
E-Mail:   florian.roemer@tu-ilmenau.de
Büro:     Helmholtzbau Zimmer 2560

Foschungsschwerpunkte/Projekte

  • Compressive Sensing: Theorie und Anwendungen
  • Multilineare Algebra / Tensorrechnung: Modellierung und effiziente Verfahren zur Berechnung von Tensor-Zerlegungungen
  • Statistische Signalverarbeitung: Ausnutzung spezieller Strukturen (z.B: nichtzirkuläre komplexe Zufallsprozesse)
  • Hochauflösende Parameterschätzung: Unterraum-basierte Schätzverfahren (ESPRIT), statistische Beschreibung (Cramér-Rao-Schranken, perturbation theory)
  • Mobilkommunikation: Multi-User MIMO-Systeme, Two-Way Relaying, Kanalschätzung
Kurzvita
  • Studium der Ingenieurinformatik an der TU Ilmenau 2000-2006 sowie an der  McMaster University Hamilton, ON, Canada (2003-2004)
  • 2006-2012 wiss. Mitarbeiter am Fachgebiet Nachrichtentechnik an der TU Ilmenau
  • 10/2012 Promotion zum Dr.-Ing., Prädikat summa cum laude
  • seit 10/2012 wiss. Mitarbeiter am Fachgebiet DVT an der TU Ilmenau

Publikationen

Anzahl der Treffer: 128
Erstellt: Fri, 15 Dec 2017 23:11:48 +0100 in 0.2697 sec


Krieg, Fabian; Kirchhof, Jan; Römer, Florian; Ihlow, Alexander; Del Galdo, Giovanni; Osman, Ahmad
Implementation issues of 3D SAFT in time and frequency domain for the fast inspection of heavy plates. - In: IEEE Xplore digital library. - New York, NY : IEEE, (2017), insges. 4 S.
https://doi.org/10.1109/ULTSYM.2017.8092833
Gradinetti, Christian; Kirchhof, Jan; Krieg, Fabian; Römer, Florian; Ihlow, Alexander; Del Galdo, Giovanni; Theado, Hendrik; Osman, Ahmad
Implementation of sparse signal recovery on FPGA for ultrasonic NDT. - In: IEEE Xplore digital library. - New York, NY : IEEE - New York, NY : IEEE, (2017), insges. 1 S.
https://doi.org/10.1109/ULTSYM.2017.8092308
Römer, Florian; Großmann, Marcus; Schön, Tobias; Gruber, Roland; Jung, Alexander; Oeckl, Steven; Del Galdo, Giovanni
Differential SART for sub-Nyquist tomographic reconstruction in presence of misalignments. - In: IEEE Xplore digital library. - New York, NY : IEEE, (2017), S. 2354-2358
https://doi.org/10.23919/EUSIPCO.2017.8081631
Liu, Kefei; Römer, Florian; Costa, João Paulo C.L.; Xiong, Jie; Yan, Yi-Sheng; Wang, Wen-Qin; Del Galdo, Giovanni
Tensor-based sparsity order estimation for big data applications. - In: IEEE Xplore digital library. - New York, NY : IEEE, (2017), S. 648-652
https://doi.org/10.23919/EUSIPCO.2017.8081287
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, Bd. 24 (2017), 11, S. 1681-1685
https://doi.org/10.1109/LSP.2017.2751303
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, Bd. 24 (2017), 8, S. 1148-1152
https://doi.org/10.1109/LSP.2017.2689243
Steinwandt, Jens; Römer, Florian; Haardt, Martin
Second-order performance analysis of Standard ESPRIT. - In: 2017 IEEE International Conference on Acoustics, Speech, and Signal Processing : proceedings : March 5-9, 2017, Hilton New Orleans Riverside, New Orleans, Louisiana, USA. - Piscataway, NJ : IEEE / IEEE International Conference on Acoustics, Speech, and Signal Processing ; 42 (New Orleans, La.) : 2017.03.05-09., ISBN 978-1-5090-4117-6, (2017), S. 3051-3055

https://doi.org/10.1109/ICASSP.2017.7952717
Kirchhof, Jan; Krieg, Fabian; Römer, Florian; Ihlow, Alexander; Osman, Ahmad; Del Galdo, Giovanni
Sparse signal recovery for ultrasonic detection and reconstruction of shadowed flaws. - In: 2017 IEEE International Conference on Acoustics, Speech, and Signal Processing : proceedings : March 5-9, 2017, Hilton New Orleans Riverside, New Orleans, Louisiana, USA. - Piscataway, NJ : IEEE / IEEE International Conference on Acoustics, Speech, and Signal Processing ; 42 (New Orleans, La.) : 2017.03.05-09., ISBN 978-1-5090-4117-6, (2017), S. 816-820

https://doi.org/10.1109/ICASSP.2017.7952269
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
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 10512004, Bd. 63 (2017), S. 190-198
http://dx.doi.org/10.1016/j.dsp.2017.01.007
Lavrenko, Anastasia; Römer, Florian; Del Galdo, Giovanni; Thomä, Reiner
On the earth mover's distance as a performance metric for sparse support recovery. - In: 2016 IEEE Global Conference on Signal and Information Processing : GlobalSIP 2016 : proceedings : December 7-9, 2016, Greater Washington, DC, USA. - Piscataway, NJ : IEEE / IEEE Global Conference on Signal and Information Processing (Washington, DC) : 2016.12.07-09., ISBN 978-1-5090-4545-7, (2016), S. 1368-1372

https://doi.org/10.1109/GlobalSIP.2016.7906065
Kehrle Miranda, Ricardo; Costa, João Paulo C. L.; Eishima, Takashi; Nakamura, Yuya; Del Galdo, Giovanni; Römer, Florian; Ribeiro, Lucas D. X.
Procedures for integrating, testing and operating advanced microsatellites. - In: IFAC-PapersOnLine. - Frankfurt : Elsevier, ISSN 24058963, Bd. 49 (2016), 30, S. 75-79
http://dx.doi.org/10.1016/j.ifacol.2016.11.130
Steinwandt, Jens; Römer, Florian; Steffens, Christian; Haardt, Martin; Pesavento, Marius
Gridless super-resolution direction finding for strictly non-circular sources based on atomic norm minimization. - In: Conference record of The Fiftieh Asilomar Conference on Signals, Systems & Computers : November 6-9, 2016, Pacific Grove, California. - Piscataway, NJ : IEEE / Asilomar Conference on Signals, Systems & Computers ; 50 (Pacific Grove, Calif.) : 2016.11.06-09., ISBN 978-1-5386-3954-2, (2016), S. 1518-1522

https://doi.org/10.1109/ACSSC.2016.7869631
Römer, Florian; Ibrahim, Mohamed; Franke, Norbert; Hadaschik, Niels; Eidloth, Andreas; Sackenreuter, Benjamin; Del Galdo, Giovanni
Measurement matrix design for compressed sensing based time delay estimation. - In: 2016 24th European Signal Processing Conference (EUSIPCO) : Aug. 28, 2016-Sept. 2, 2016. - Piscataway, NJ : IEEE / European Signal Processing Conference ; 24 (Budapest) : 2016.08.28-09.02., ISBN 978-0-9928626-5-7, (2016), S. 458-462

https://doi.org/10.1109/EUSIPCO.2016.7760290
Varatharaajan, Sutharshun; Römer, Florian; Kostka, Günther; Keil, Florian; Uhrmann, Franz; Del Galdo, Giovanni
On poisson compressed sensing and parameter estimation in sheet-of-light surface scanning. - In: 2016 24th European Signal Processing Conference (EUSIPCO) : Aug. 28, 2016-Sept. 2, 2016. - Piscataway, NJ : IEEE / European Signal Processing Conference ; 24 (Budapest) : 2016.08.28-09.02., ISBN 978-0-9928626-5-7, (2016), S. 453-457

https://doi.org/10.1109/EUSIPCO.2016.7760289
Miranda, Ricardo Kehrle; Costa, João Paulo C. L.; Römer, Florian; Raschke, Florian; Eishima, Takashi; Nakamura, Yuya; Del Galdo, Giovanni
Implementation of improved software defined radio modulation scheme and command and telemetry software interface for small satellites in 5G systems. - In: Proceedings of the 19th International Conference on OFDM and Frequency Domain Techniques (ICOF 2016) / International Conference on OFDM and Frequency Domain Techniques ; 19 (Essen) : 2016.08.25-26. : August 25th-26th 2016, Essen, Germany. - Berlin : VDE Verlag, ISBN 978-3-8007-4253-0, (2016), S. 77-83

Kirchhof, Jan; Krieg, Fabian; Römer, Florian; Ihlow, Alexander; Osman, Ahmad; Del Galdo, Giovanni
Speeding up 3D SAFT for ultrasonic NDT by sparse deconvolution. - In: 2016 IEEE International Ultrasonics Symposium (IUS) : 18-21 Sept. 2016. - [Piscataway, NJ] : IEEE / IEEE International Ultrasonics Symposium (Tours) : 2016.09.18-21., ISBN 978-1-4673-9897-8, (2016), insges. 4 S.

http://dx.doi.org/10.1109/ULTSYM.2016.7728434
Steinwandt, Jens; Römer, Florian; Haardt, Martin
Analytical performance evaluation of multi-dimensional Tensor-ESPRIT-based algorithms for strictly non-circular sources. - In: 2016 IEEE Sensor Array and Multichannel Signal Processing Workshop (SAM) : 10-13 July 2016. - Piscataway, NJ : IEEE / IEEE Sensor Array and Multichannel Signal Processing Workshop ; 9 (Rio de Janeiro) : 2016.07.10-13., ISBN 978-1-5090-2103-1, (2016), insges. 5 S.

http://dx.doi.org/10.1109/SAM.2016.7569659
Lavrenko, Anastasia; Römer, Florian; Stein, S.; Cohen, D.; Del Galdo, Giovanni; Thomä, Reiner S.; Eldar, Yonina C.
Spatially resolved sub-Nyquist sensing of multiband signals with arbitrary antenna arrays. - In: 2016 IEEE 17th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC). - Piscataway, NJ : IEEE / IEEE International Workshop on Signal Processing Advances in Wireless Communications ; 17 (Edinburgh) : 2016.07.03-06., ISBN 978-1-5090-1749-2, (2016), insges. 5 S.

http://dx.doi.org/10.1109/SPAWC.2016.7536776
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
Großmann, Marcus; Ramireddy, Venkatesh; König, Jonas; Landmann, Markus; Römer, Florian; Del Galdo, Giovanni; Perthold, Rainer
Antenna array optimization strategies for robust direction finding. - In: 2016 10th European Conference on Antennas and Propagation (EuCAP) : the 10th European Conference on Antennas and Propagation (EuCAP 2016) took place 10-15 April 2016 in Davos, Switzerland. - [Piscataway, NJ] : IEEE / European Conference on Antennas and Propagation ; 10 (Davos) : 2016.04.10-15., ISBN 978-88-907018-6-3, (2016), insges. 5 S.

http://dx.doi.org/10.1109/EuCAP.2016.7481144
Steinwandt, Jens; Römer, Florian; Haardt, Martin
Sparsity-based direction-of-arrival estimation for strictly non-circular sources. - In: 2016 IEEE International Conference on Acoustics, Speech, and Signal Processing : proceedings : March 20-25, 2016, Shanghai International Convention Center, Shanghai, China. - Piscataway, NJ : IEEE / IEEE International Conference on Acoustics, Speech, and Signal Processing ; 41 (Shanghai) : 2016.03.20-25., ISBN 978-1-4799-9988-0, (2016), S. 3246-3250

http://dx.doi.org/10.1109/ICASSP.2016.7472277
Steinwandt, Jens; Römer, Florian; Haardt, Martin
Analytical performance assessment of esprit-type algorithms for coexisting circular and strictly non-circular signals. - In: 2016 IEEE International Conference on Acoustics, Speech, and Signal Processing : proceedings : March 20-25, 2016, Shanghai International Convention Center, Shanghai, China. - Piscataway, NJ : IEEE / IEEE International Conference on Acoustics, Speech, and Signal Processing ; 41 (Shanghai) : 2016.03.20-25., ISBN 978-1-4799-9988-0, (2016), S. 2931-2935

http://dx.doi.org/10.1109/ICASSP.2016.7472214
Ibrahim, Mohamed; Römer, Florian; Hadaschik, Niels; Tröger, Hans-Martin; Sackenreuter, Benjamin; Franke, Norbert; Robert, Jörg; Del Galdo, Giovanni
Temporal wireless synchronization with compressed opportunistic signals. - In: 2016 IEEE Topical Conference on Wireless Sensors and Sensor Networks : 24-27 January 2016, Austin, Texas, USA. - [Piscataway, NJ] : IEEE / WiSNet (Austin, Tex.) : 2016.01.24-27., ISBN 978-1-5090-1691-4, (2016), S. 93-96

http://dx.doi.org/10.1109/WISNET.2016.7444331
Steinwandt, Jens; Römer, Florian; Haardt, Martin
Deterministic Cramér-Rao bound for a mixture of circular and strictly non-circular signals. - In: 2015 12th International Symposium on Wireless Communication Systems (ISWCS) : Brussels, Belgium, August 25-28, 2015 : proceedings. - Piscataway, NJ : IEEE / International Symposium on Wireless Communication Systems ; 12 (Brussels) : 2015.08.25-28., ISBN 978-1-4673-6540-6, (2015), S. 661-665

http://dx.doi.org/10.1109/ISWCS.2015.7454431
Ibrahim, Mohamed; Römer, Florian; Hadaschik, Niels; Tröger, Hans-Martin; Sackenreuter, Benjamin; Franke, Norbert; Robert, Jörg; Del Galdo, Giovanni
Compressed temporal synchronization with opportunistic signals. - In: Conference record of the Forty-ninth Asilomar Conference on Signals, Systems & Computers : November 8-11, 2015, Pacific Grove, California. - Piscataway, NJ : IEEE / Asilomar Conference on Signals, Systems & Computers ; 49 (Pacific Grove, Calif.) : 2015.11.08-11., ISBN 978-1-4673-8576-3, (2015), S. 204-208

http://dx.doi.org/10.1109/ACSSC.2015.7421114
Ozer, Berk; Lavrenko, Anastasia; Gezici, Sinan; Römer, Florian; Del Galdo, Giovanni; Arikan, Orhan
Adaptive measurement matrix design for compressed DoA estimation with sensor arrays. - In: Conference record of the Forty-ninth Asilomar Conference on Signals, Systems & Computers : November 8-11, 2015, Pacific Grove, California. - Piscataway, NJ : IEEE / Asilomar Conference on Signals, Systems & Computers ; 49 (Pacific Grove, Calif.) : 2015.11.08-11., ISBN 978-1-4673-8576-3, (2015), S. 1769-1773

http://dx.doi.org/10.1109/ACSSC.2015.7421455
Kehrle Miranda, Ricardo; Costa, João Paulo C. L.; Römer, Florian; Almeida, André L. F.; Del Galdo, Giovanni
Generalized sidelobe cancellers for multidimensional separable arrays. - In: 2015 IEEE 6th International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP) : date: 13-16 Dec. 2015. - Piscataway, NJ : IEEE / IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing ; 6 (Cancun) : 2015.12.13-16., ISBN 978-1-4799-1963-5, (2015), S. 193-196

http://dx.doi.org/10.1109/CAMSAP.2015.7383769
Lavrenko, Anastasia; Römer, Florian; Del Galdo, Giovanni; Thomä, Reiner; Arikan, Orhan
Detection of time-varying support via rank evolution approach for effective joint sparse recovery. - In: 2015 23rd European Signal Processing Conference (EUSIPCO) : Aug. 31, 2015-Sept. 4, 2015. - [Piscataway, NJ] : IEEE / European Signal Processing Conference ; 23 (Nice) : 2015.08.31-09.04., ISBN 978-0-9928626-3-3, (2015), S. 1716-1720

http://dx.doi.org/10.1109/EUSIPCO.2015.7362677
Ibrahim, Mohamed; Römer, Florian; Del Galdo, Giovanni
An adaptively focusing measurement design for compressed sensing based DOA estimation. - In: 2015 23rd European Signal Processing Conference (EUSIPCO) : Aug. 31, 2015-Sept. 4, 2015. - [Piscataway, NJ] : IEEE / European Signal Processing Conference ; 23 (Nice) : 2015.08.31-09.04., ISBN 978-0-9928626-3-3, (2015), S. 859-863

http://dx.doi.org/10.1109/EUSIPCO.2015.7362505
Skoblikov, Sergii; Ibrahim, Mohamed; Römer, Florian; Thomä, Reiner S.; Del Galdo, Giovanni
DoA estimation with reflectarray according to single pixel camera principle. - In: 2015 3rd International Workshop on Compressed Sensing Theory and Its Applications to Radar, Sonar and Remote Sensing (CoSeRa) : date: 17-19 June 2015 . - Piscataway, NJ : IEEE / International Workshop on Compressed Sensing Theory and Its Applications to Radar, Sonar and Remote Sensing ; 3 (Pisa) : 2015.06.16-19., ISBN 978-1-4799-7420-7, (2015), S. 268-272

http://dx.doi.org/10.1109/CoSeRa.2015.7330306
Lavrenko, Anastasia; Römer, Florian; Del Galdo, Giovanni; Thomä, Reiner S.
Sparsity order estimation for sub-Nyquist sampling and recovery of sparse multiband signals. - In: 2015 IEEE International Conference on Communications (ICC) : 8 - 12 June 2015, London, United Kingdom. - Piscataway, NJ : IEEE / IEEE International Conference on Communications (London) : 2015.06.08-12., ISBN 978-1-4673-6430-0, (2015), S. 4907-4912

http://dx.doi.org/10.1109/ICC.2015.7249100
Skoblikov, Sergii; Ibrahim, Mohamed; Römer, Florian; Thomä, Reiner S.
Numerical assessment of reflectarray applicability to CS-based DoA estimation. - In: 2015 16th International Radar Symposium (IRS) : 24 - 26 June 2015, Dresden, Germany. - Piscataway, NJ : IEEE / International Radar Symposium ; 16 (Dresden) : 2015.06.24-26., ISBN 978-1-4799-7841-0, (2015), S. 404-409

http://dx.doi.org/10.1109/IRS.2015.7226353
Ibrahim, Mohamed; Römer, Florian; Del Galdo, Giovanni
On the design of the measurement matrix for Compressed Sensing based DOA estimation. - In: 2015 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) : 19 - 24 April 2015, Brisbane, Queensland, Australia. - Piscataway, NJ : IEEE / IEEE International Conference on Acoustics, Speech and Signal Processing ; 40 (South Brisbane, Brisbane) : 2015.04.19-24., ISBN 978-1-4673-6998-5, (2015), S. 3631-3635

http://dx.doi.org/10.1109/ICASSP.2015.7178648
Steinwandt, Jens; Römer, Florian; Haardt, Martin
Esprit-type algorithms for a received mixture of circular and strictly non-circular signals. - In: 2015 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) : 19 - 24 April 2015, Brisbane, Queensland, Australia. - Piscataway, NJ : IEEE / IEEE International Conference on Acoustics, Speech and Signal Processing ; 40 (South Brisbane, Brisbane) : 2015.04.19-24., ISBN 978-1-4673-6998-5, (2015), S. 2809-2813

http://dx.doi.org/10.1109/ICASSP.2015.7178483
Römer, Florian; Lavrenko, Anastasia; Del Galdo, Giovanni; Hotz, Thomas; Arikan, Orhan; Thomä, Reiner S.
Sparsity order estimation for single snapshot compressed sensing. - In: 48th Asilomar Conference on Signals, Systems and Computers, 2014 : 2 - 5 Nov. 2014, Pacific Grove, California. - Piscataway, NJ : IEEE / Asilomar Conference on Signals, Systems and Computers ; 48 (Pacific Grove, Calif.) : 2014.11.02-05., ISBN 978-1-4799-8298-1, (2014), S. 1220-1224

http://dx.doi.org/10.1109/ACSSC.2014.7094653
Lavrenko, Anastasia; Römer, Florian; Del Galdo, Giovanni; Thomä, Reiner S.
On the sensing matrix performance for support recovery of noisy sparse signals. - In: IEEE Global Conference on Signal and Information Processing (GlobalSIP), 2014 : 3 - 5 Dec. 2014, Atlanta, GA, USA ; [including workshop papers]. - Piscataway, NJ : IEEE / IEEE Global Conference on Signal and Information Processing ; 2 (Atlanta, Ga.) : 2014.12.03-05., ISBN 978-1-4799-7089-6, (2014), S. 679-683

http://dx.doi.org/10.1109/GlobalSIP.2014.7032204
Lavrenko, Anastasia; Römer, Florian; Del Galdo, Giovanni; Thomä, Reiner; Arikan, Orhan
An empirical eigenvalue-threshold test for sparsity level estimation from compressed measurements. - In: Proceedings of the 22nd European Signal Processing Conference (EUSIPCO), 2014 : 1 - 5 Sept. 2014, Lisbon, Portugal. - Piscataway, NJ : IEEE / European Signal Processing Conference ; 22 (Lisbon) : 2014.09.01-05., ISBN 978-1-4799-4603-7, (2014), S. 1761-1765

http://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=6952632
Steinwandt, Jens; Römer, Florian; Haardt, Martin
Analytical ESPRIT-based performance study: what can we gain from non-circular sources?. - In: 2014 IEEE 8th Sensor Array and Multichannel Signal Processing Workshop (SAM) : 22 - 25 June 2014, A Coruña, Spain. - Piscataway, NJ : IEEE / IEEE Sensor Array and Multichannel Signal Processing Workshop ; 8 (A Coruña) : 2014.06.22-25., ISBN 978-1-4799-1481-4, (2014), S. 17-20

http://dx.doi.org/10.1109/SAM.2014.6882327
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 16876180, (2014), 123, insges. 14 S.
http://dx.doi.org/10.1186/1687-6180-2014-123
Römer, Florian; Del Galdo, Giovanni; Haardt, Martin
Tensor-based algorithms for learning multidimensional separable dictionaries. - In: IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2014 : 4 - 9 May 2014, Florence, Italy. - Piscataway, NJ : IEEE / IEEE International Conference on Acoustics, Speech and Signal Processing ; 39 (Florence) : 2014.05.04-09., ISBN 978-1-4799-2894-1, (2014), S. 2963-2967

http://dx.doi.org/10.1109/ICASSP.2014.6854345
Steinwandt, Jens; Römer, Florian; Haardt, Martin
Asymptotic performance analysis of esprit-type algorithms for circular and strictly non-circular sources with spatial smoothing. - In: IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2014 : 4 - 9 May 2014, Florence, Italy. - Piscataway, NJ : IEEE / IEEE International Conference on Acoustics, Speech and Signal Processing ; 39 (Florence) : 2014.05.04-09., ISBN 978-1-4799-2894-1, (2014), S. 2277-2281

http://dx.doi.org/10.1109/ICASSP.2014.6854005
Ibrahim, Mohamed; Römer, Florian; Alieiev, Roman; Del Galdo, Giovanni; Thomä, Reiner S.
On the estimation of grid offsets in CS-based direction-of-arrival estimation. - In: IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2014 : 4 - 9 May 2014, Florence, Italy. - Piscataway, NJ : IEEE / IEEE International Conference on Acoustics, Speech and Signal Processing ; 39 (Florence) : 2014.05.04-09., ISBN 978-1-4799-2894-1, (2014), S. 6776-6780

http://dx.doi.org/10.1109/ICASSP.2014.6854912
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
Römer, Florian; Ibrahim, Mohamed; Alieiev, Roman; Landmann, Markus; Thomä, Reiner S.; Del Galdo, Giovanni
Polarimetric compressive sensing based DOA estimation. - In: WSA 2014 / International Workshop on Smart Antennas ; 18 (Erlangen) : 2014.03.12-13. - Berlin [u.a.] : VDE-Verl., ISBN 978-3-8007-3584-6, (2014), S. 85-92

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, Bd. 63 (2014), 2, S. 628-642
http://dx.doi.org/10.1109/TVT.2013.2280951
Haardt, Martin; Pesavento, Marius; Römer, Florian; Nabil El Korso, Mohammed
Subspace methods and exploitation of special array structures. - In: Array and statistical signal processing : . - Amsterdam [u.a.] : Acad. Press/Elsevier, ISBN 978-0-12-411597-2, (2014), S. 651-717

Liu, Kefei; Costa, João Paulo C. L.; So, Hing Cheung; Römer, Florian; Huang, Lei; Sousa, Rafael Timóteo
On the use of order selection rules for accurate parameter estimation in threshold region. - In: Proceedings of the 21st European Signal Processing Conference (EUSIPCO), 2013 : 9 - 13 Sept. 2013, Marrakech, Morocco. - Piscataway, NJ : IEEE / European Signal Processing Conference ; 21 (Marrakech) : 2013.09.09-13., ISBN 978-1-4799-3687-8, (2013), insges. 5 S.

http://ieeexplore.ieee.org/xpl/abstractAuthors.jsp?arnumber=6811694
Steinwandt, Jens; Römer, Florian; Haardt, Martin
Performance analysis of ESPRIT-type algorithms for strictly non-circular sources using structured least squares. - In: 2013 IEEE 5th International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP) : 15 - 18 Dec. 2013, Saint Martin, French West Indies, France. - Piscataway, NJ : IEEE / IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing ; 5 (Saint Martin) : 2013.12.15-18., ISBN 978-1-4673-3146-3, (2013), S. 316-319

http://dx.doi.org/10.1109/CAMSAP.2013.6714071
Römer, Florian; Kasnakli, Emin-Koray; Cheng, Yao; Haardt, Martin
Tensor subspace tracking via Kronecker structured projections (TeTraKron). - In: 2013 IEEE 5th International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP) : 15 - 18 Dec. 2013, Saint Martin, French West Indies, France. - Piscataway, NJ : IEEE / IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing ; 5 (Saint Martin) : 2013.12.15-18., ISBN 978-1-4673-3146-3, (2013), S. 212-215

http://dx.doi.org/10.1109/CAMSAP.2013.6714045
Steinwandt, Jens; Römer, Florian; Haardt, Martin
Performance analysis of ESPRIT-type algorithms for non-circular sources. - In: IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2013 : 26 - 31 May 2013, Vancouver Convention Center, Vancouver, British Columbia, Canada ; proceedings. - Piscataway, NJ : IEEE / IEEE International Conference on Acoustics, Speech and Signal Processing ; 38 (Vancouver, British Columbia) : 2013.05.26-31., ISBN 978-1-4799-0357-3, (2013), S. 3986-3990

http://dx.doi.org/10.1109/ICASSP.2013.6638407
Zhang, Jianshu; Haardt, Martin; Römer, Florian
Robust design of block diagonalization using perturbation analysis. - In: IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2013 : 26 - 31 May 2013, Vancouver Convention Center, Vancouver, British Columbia, Canada ; proceedings. - Piscataway, NJ : IEEE / IEEE International Conference on Acoustics, Speech and Signal Processing ; 38 (Vancouver, British Columbia) : 2013.05.26-31., ISBN 978-1-4799-0357-3, (2013), S. 4192-4196

http://dx.doi.org/10.1109/ICASSP.2013.6638449
Song, Bin; Haardt, Martin; Römer, Florian
A tensor-based subspace method for blind estimation of MIMO channels. - In: ISWCS 2013 / ISWCS ; 10 (Ilmenau) : 2013.08.27-30. - Berlin [u.a.] : VDE-Verl., ISBN 978-3-8007-3529-7, (2013), S. 341-345

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 10512004, Bd. 23 (2013), 5, S. 1668-1677
http://dx.doi.org/10.1016/j.dsp.2013.06.009
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
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 10512004, Bd. 23 (2013), 3, S. 701-711
http://dx.doi.org/10.1016/j.dsp.2012.12.010
Römer, Florian; Schröter, Carola; Haardt, Martin
A semi-algebraic framework for approximate CP decompositions via joint matrix diagonalization and generalized unfoldings. - In: Conference record of the Forty Sixth Asilomar Conference on Signals, Systems and Computers (ASILOMAR), 2012 : 4 - 7 Nov. 2012, Pacific Grove, California. - Piscataway, NJ : IEEE / Asilomar Conference on Signals, Systems and Computers ; 46 (Pacific Grove, Calif.) : 2012.11.04-07., ISBN 978-1-4673-5050-1, (2012), S. 2023-2027

http://dx.doi.org/10.1109/ACSSC.2012.6489396
Zhang, Jianshu; Römer, Florian; Haardt, Martin
Distributed beamforming for two-way relaying networks with individual power constraints. - In: Conference record of the Forty Sixth Asilomar Conference on Signals, Systems and Computers (ASILOMAR), 2012 : 4 - 7 Nov. 2012, Pacific Grove, California. - Piscataway, NJ : IEEE / Asilomar Conference on Signals, Systems and Computers ; 46 (Pacific Grove, Calif.) : 2012.11.04-07., ISBN 978-1-4673-5050-1, (2012), S. 542-546

http://dx.doi.org/10.1109/ACSSC.2012.6489064
Muma, Michael; Cheng, Yao; Römer, Florian; Haardt, Martin; Zoubir, Abdelhak M.
Robust source number enumeration for r-dimensional arrays in case of brief sensor failures. - In: IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2012 : 25 - 30 March 2012, Kyoto, Japan ; proceedings. - Piscataway, NJ : IEEE / IEEE International Conference on Acoustics, Speech and Signal Processing ; 37 (Kyoto) : 2012.03.25-30., ISBN 978-1-4673-0045-2, (2012), S. 3709-3712

http://dx.doi.org/10.1109/ICASSP.2012.6288722
Khabbazibasmenj, Arash; Vorobyov, Sergiy; Römer, Florian; Haardt, Martin
Polynomial-time DC (POTDC) for sum-rate maximization in two-way AF MIMO relaying. - In: IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2012 : 25 - 30 March 2012, Kyoto, Japan ; proceedings. - Piscataway, NJ : IEEE / IEEE International Conference on Acoustics, Speech and Signal Processing ; 37 (Kyoto) : 2012.03.25-30., ISBN 978-1-4673-0045-2, (2012), S. 2889-2892

http://dx.doi.org/10.1109/ICASSP.2012.6288520
Li, Sheng; Cheng, Yao; Zhang, Jianshu; Römer, Florian; Song, Bin; Haardt, Martin; Zhou, Yuan; Dong, Mingjie
Efficient spatial scheduling and precoding algorithms for MC MU MIMO systems. - In: International Symposium on Wireless Communication Systems (ISWCS), 2012 : 28 - 31 Aug. 2012, Paris, France ; proceedings. - Piscataway, NJ : IEEE / International Symposium on Wireless Communication Systems ; 9 (Paris) : 2012.08.28-31., ISBN 978-1-4673-0762-8, (2012), S. 731-735

http://dx.doi.org/10.1109/ISWCS.2012.6328464
Cheng, Yao; Song, Nuan; Römer, Florian; Haardt, Martin; Henniger, Hennes; Metzig, Robert; Diedrich, Erhard
Satellite ground stations with electronic beam steering . - In: IEEE First AESS European Conference on Satellite Telecommunications (ESTEL), 2012 : 2 - 5 Oct. 2012, Fontana di Trevi Conference Centre, Rome, Italy. - Piscataway, NJ : IEEE / IEEE AESS European Conference on Satellite Telecommunications ; 1 (Rome) : 2012.10.02-05., ISBN 978-1-4673-4687-0, (2012), insges. 7 S.

http://dx.doi.org/10.1109/ESTEL.2012.6400173
Weis, Martin; Römer, Florian; Haardt, Martin; Husar, Peter
Dual-symmetric parallel factor analysis using procrustes estimation and Khatri-Rao factorization. - In: Proceedings of the 20th European Signal Processing Conference (EUSIPCO), 2012 : 27 - 31 Aug. 2012, Bucharest, Romania. - Piscataway, NJ : IEEE / European Signal Processing Conference ; 20 (Bucharest) : 2012.08.27-31., ISBN 978-1-4673-1068-0, (2012), S. 270-274

http://ieeexplore.ieee.org/xpl/articleDetails.jsp?tp=&arnumber=6333983
Zafar, Bilal; Gherekhloo, Soheyl; Römer, Florian; Haardt, Martin
Impact of synchronization errors on Alamouti-STBC-based cooperative MIMO schemes. - In: IEEE 7th Sensor Array and Multichannel Signal Processing Workshop (SAM), 2012 : 17 - 20 June 2012, Hoboken, NJ, USA. - Piscataway, NJ : IEEE / IEEE Sensor Array and Multichannel Signal Processing Workshop ; 7 (Hoboken, NJ) : 2012.06.17-20., ISBN 978-1-4673-1070-3, (2012), S. 81-84

http://dx.doi.org/10.1109/SAM.2012.6250567
Römer, Florian
Advanced algebraic concepts for efficient multi-channel signal processing. - Online-Ressource (PDF-Datei: XXIII, 383 S., 3,50 MB)
Ilmenau : Techn. Univ., Diss., 2012

Unsere moderne Gesellschaft ist Zeuge eines fundamentalen Wandels in der Art und Weise wie wir mit Technologie interagieren. Geräte werden zunehmend intelligenter - sie verfügen über mehr und mehr Rechenleistung und häufiger über eigene Kommunikationsschnittstellen. Das beginnt bei einfachen Haushaltsgeräten und reicht über Transportmittel bis zu großen überregionalen Systemen wie etwa dem Stromnetz. Die Erfassung, die Verarbeitung und der Austausch digitaler Informationen gewinnt daher immer mehr an Bedeutung. Die Tatsache, dass ein wachsender Anteil der Geräte heutzutage mobil und deshalb batteriebetrieben ist, begründet den Anspruch, digitale Signalverarbeitungsalgorithmen besonders effizient zu gestalten. Dies kommt auch dem Wunsch nach einer Echtzeitverarbeitung der großen anfallenden Datenmengen zugute. Die vorliegende Arbeit demonstriert Methoden zum Finden effizienter algebraischer Lösungen für eine Vielzahl von Anwendungen mehrkanaliger digitaler Signalverarbeitung. Solche Ansätze liefern nicht immer unbedingt die bestmögliche Lösung, kommen dieser jedoch häufig recht nahe und sind gleichzeitig bedeutend einfacher zu beschreiben und umzusetzen. Die einfache Beschreibungsform ermöglicht eine tiefgehende Analyse ihrer Leistungsfähigkeit, was für den Entwurf eines robusten und zuverlässigen Systems unabdingbar ist. Die Tatsache, dass sie nur gebräuchliche algebraische Hilfsmittel benötigen, erlaubt ihre direkte und zügige Umsetzung und den Test unter realen Bedingungen. Diese Grundidee wird anhand von drei verschiedenen Anwendungsgebieten demonstriert. Zunächst wird ein semi-algebraisches Framework zur Berechnung der kanonisch polyadischen (CP) Zerlegung mehrdimensionaler Signale vorgestellt. Dabei handelt es sich um ein sehr grundlegendes Werkzeug der multilinearen Algebra mit einem breiten Anwendungsspektrum von Mobilkommunikation über Chemie bis zur Bildverarbeitung. Verglichen mit existierenden iterativen Lösungsverfahren bietet das neue Framework die Möglichkeit, den Rechenaufwand und damit die Güte der erzielten Lösung zu steuern. Es ist außerdem weniger anfällig gegen eine schlechte Konditionierung der Ausgangsdaten. Das zweite Gebiet, das in der Arbeit besprochen wird, ist die unterraumbasierte hochauflösende Parameterschätzung für mehrdimensionale Signale, mit Anwendungsgebieten im RADAR, der Modellierung von Wellenausbreitung, oder bildgebenden Verfahren in der Medizin. Es wird gezeigt, dass sich derartige mehrdimensionale Signale mit Tensoren darstellen lassen. Dies erlaubt eine natürlichere Beschreibung und eine bessere Ausnutzung ihrer Struktur als das mit Matrizen möglich ist. Basierend auf dieser Idee entwickeln wir eine tensor-basierte Schätzung des Signalraums, welche genutzt werden kann um beliebige existierende Matrix-basierte Verfahren zu verbessern. Dies wird im Anschluss exemplarisch am Beispiel der ESPRIT-artigen Verfahren gezeigt, für die verbesserte Versionen vorgeschlagen werden, die die mehrdimensionale Struktur der Daten (Tensor-ESPRIT), nichzirkuläre Quellsymbole (NC ESPRIT), sowie beides gleichzeitig (NC Tensor-ESPRIT) ausnutzen. Um die endgültige Schätzgenauigkeit objektiv einschätzen zu können wird dann ein Framework für die analytische Beschreibung der Leistungsfähigkeit beliebiger ESPRIT-artiger Algorithmen diskutiert. Verglichen mit existierenden analytischen Ausdrücken ist unser Ansatz allgemeiner, da keine Annahmen über die statistische Verteilung von Nutzsignal und Rauschen benötigt werden und die Anzahl der zur Verfügung stehenden Schnappschüsse beliebig klein sein kann. Dies führt auf vereinfachte Ausdrücke für den mittleren quadratischen Schätzfehler, die Schlussfolgerungen über die Effizienz der Verfahren unter verschiedenen Bedingungen zulassen. Das dritte Anwendungsgebiet ist der bidirektionale Datenaustausch mit Hilfe von Relay-Stationen. Insbesondere liegt hier der Fokus auf Zwei-Wege-Relaying mit Hilfe von Amplify-and-Forward-Relays mit mehreren Antennen, da dieser Ansatz ein besonders gutes Kosten-Nutzen-Verhältnis verspricht. Es wird gezeigt, dass sich die nötige Kanalkenntnis mit einem einfachen algebraischen Tensor-basierten Schätzverfahren gewinnen lässt. Außerdem werden Verfahren zum Finden einer günstigen Relay-Verstärkungs-Strategie diskutiert. Bestehende Ansätze basieren entweder auf komplexen numerischen Optimierungsverfahren oder auf Ad-Hoc-Ansätzen die keine zufriedenstellende Bitfehlerrate oder Summenrate liefern. Deshalb schlagen wir algebraische Ansätze zum Finden der Relayverstärkungsmatrix vor, die von relevanten Systemmetriken inspiriert sind und doch einfach zu berechnen sind. Wir zeigen das algebraische ANOMAX-Verfahren zum Erreichen einer niedrigen Bitfehlerrate und seine Modifikation RR-ANOMAX zum Erreichen einer hohen Summenrate. Für den Spezialfall, in dem die Endgeräte nur eine Antenne verwenden, leiten wir eine semi-algebraische Lösung zum Finden der Summenraten-optimalen Strategie (RAGES) her. Anhand von numerischen Simulationen wird die Leistungsfähigkeit dieser Verfahren bezüglich Bitfehlerrate und erreichbarer Datenrate bewertet und ihre Effektivität gezeigt.


http://www.db-thueringen.de/servlets/DocumentServlet?id=21627
Cheng, Yao; Li, Sheng; Zhang, Jianshu; Römer, Florian; Haardt, Martin; Zhou, Yuan; Dong, Mingjie
Linear precoding-based geometric mean decomposition (LP-GMD) for multi-user MIMO systems. - In: International Symposium on Wireless Communication Systems (ISWCS), 2012 : 28 - 31 Aug. 2012, Paris, France ; proceedings. - Piscataway, NJ : IEEE / International Symposium on Wireless Communication Systems ; 9 (Paris) : 2012.08.28-31., ISBN 978-1-4673-0762-8, (2012), S. 1039-1043

http://dx.doi.org/10.1109/ISWCS.2012.6328526
Zhang, Jianshu; Römer, Florian; Haardt, Martin; Khabbazibasmenj, Arash; Vorobyov, Sergiy A.
Sum rate maximization for multi-pair two-way relaying with single-antenna amplify and forward relays. - In: IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2012 : 25 - 30 March 2012, Kyoto, Japan ; proceedings. - Piscataway, NJ : IEEE / IEEE International Conference on Acoustics, Speech and Signal Processing ; 37 (Kyoto) : 2012.03.25-30., ISBN 978-1-4673-0045-2, (2012), S. 2477-2480

http://dx.doi.org/10.1109/ICASSP.2012.6288418
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
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
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
Zhang, Jianshu; Bornhorst, Nils; Römer, Florian; Haardt, Martin; Pesavento, Marius
Optimal and suboptimal beamforming for multi-operator two-way relaying with a MIMO amplify-and-forward relay. - In: International ITG Workshop on Smart Antennas (WSA), 2012 : 7 - 8 March 2012 in Dresden, Germany. - Piscataway, NJ : IEEE / International ITG Workshop on Smart Antennas ; 16 (Dresden) : 2012.03.07-08., ISBN 978-1-4577-1924-0, (2012), S. 307-311

http://dx.doi.org/10.1109/WSA.2012.6181225
Li, Jianhui; Zhang, Jianshu; Römer, Florian; Haardt, Martin; Scheunert, Christian; Jorswieck, Eduard; Hekrdla, Miroslav; Sykora, Jan
Relay-assisted spectrum and infrastructure sharing between multiple operators. - In: Future Network & Mobile Summit (FutureNetw 2011) / Future Network & Mobile Summit (Warsaw) : 2011.06.15-17. - s.l. : IIMC Internat. Information Management Corp., ISBN 978-1-905824-23-6, (2011), insges. 8 S.

Römer, Florian; Sarmadi, Nima; Song, Bin; Haardt, Martin; Pesavento, Marius; Gershman, Alex B.
Tensor-based semi-blind channel estimation for MIMO OSTBC-coded systems. - In: 2011 Conference record of the Forty Fifth Asilomar Conference on Signals, Systems and Computers : (ASILOMAR) ; 6 - 9 Nov. 2011, Pacific Grove, California, USA. - Piscataway, NJ : IEEE / Asilomar Conference on Signals, Systems, and Computers ; 45 (Pacific Grove, Calif.) : 2011.11.06-09., ISBN 978-1-4673-0323-1, (2011), S. 449-453

http://dx.doi.org/10.1109/ACSSC.2011.6190039
Römer, Florian; Jorswieck, Eduard; Haardt, Martin
Efficient spatial processing and resource allocation for amplify and forward two-way relaying. - In: Cross layer designs in WLAN systems : . - Leicester : Troubador Publ., ISBN 978-1-8487-6227-5, (2011), S. 93-131

Li, Jianhui; Römer, Florian; Haardt, Martin
Spectrum and infrastructure sharing in the MIMO interference relay channels. - In: EUSIPCO 2011 / European Signal Processing Conference ; 19 (Barcelona) : 2011.08.29-09.02. - Barcelona : EUSIPCO, (2011), S. 181-185
Lu, Zhihua; Zoubir, Abdelhak M.; Römer, Florian; Haardt, Martin
Source enumeration using the bootstrap for very few samples. - In: EUSIPCO 2011 / European Signal Processing Conference ; 19 (Barcelona) : 2011.08.29-09.02. - Barcelona : EUSIPCO, (2011), S. 976-979
Li, Jianhui; Römer, Florian; Haardt, Martin
Efficient relay sharing (EReSH) between multiple operators in amplify-and-forward relaying systems. - In: 4th IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP), 2011 : 13 - 16 Dec. 2011, San Juan, Puerto Rico, USA. - Piscataway, NJ : IEEE / IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing ; 4 (San Juan, Puerto Rico) : 2011.12.13-16., ISBN 978-1-4577-2104-5, (2011), S. 249-252

http://dx.doi.org/10.1109/CAMSAP.2011.6135995
Costa, João C. Lustosa; Römer, Florian; Schulz, Dominik; Sousa, Rafael Timóteo
Subspace based multi-dimensional model order selection in colored noise scenarios. - In: IEEE Information Theory Workshop (ITW), 2011 : 16 - 20 Oct. 2011, Paraty, Brazil. - Piscataway, NJ : IEEE / IEEE Information Theory Workshop (Paraty) : 2011.10.16-20., ISBN 978-1-4577-0438-3, (2011), S. 380-384

http://dx.doi.org/10.1109/ITW.2011.6089484
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 16876180, (2011), 26, insges. 13 S.
http://dx.doi.org/10.1186/1687-6180-2011-26
Zhang, Jianshu; Römer, Florian; Haardt, Martin
Beamforming design for multi-user two-way relaying with MIMO amplify and forward relays. - In: 2011 IEEE International Conference on Acoustics, Speech and Signal Processing : (ICASSP) ; 22 - 27 May 2011, Prague Congress Center, Prague, Czech Republic ; proceedings. - Piscataway, NJ : IEEE / IEEE International Conference on Acoustics, Speech and Signal Processing ; 36 (Prague) : 2011.05.22-27., ISBN 978-1-4577-0539-7, (2011), S. 2824-2827

http://dx.doi.org/10.1109/ICASSP.2011.5947072
Römer, Florian; Haardt, Martin
Analytical performance assessment of 1-D structured least squares. - In: 2011 IEEE International Conference on Acoustics, Speech and Signal Processing : (ICASSP) ; 22 - 27 May 2011, Prague Congress Center, Prague, Czech Republic ; proceedings. - Piscataway, NJ : IEEE / IEEE International Conference on Acoustics, Speech and Signal Processing ; 36 (Prague) : 2011.05.22-27., ISBN 978-1-4577-0539-7, (2011), S. 2464-2467

http://dx.doi.org/10.1109/ICASSP.2011.5946983
Song, Bin; Römer, Florian; Haardt, Martin
Blind estimation of SIMO channels using a tensor-based subspace method. - In: Conference record of the Forty-Fourth Asilomar Conference on Signals, Systems and Computers (ASILOMAR), 2010 : 7 - 10 Nov. 2010, Pacific Grove, California. - Piscataway, NJ : IEEE / Asilomar Conference on Signals, Systems and Computers ; 44 (Pacific Grove, Calif.) : 2010.11.07-10., ISBN 978-1-4244-9722-5, (2010), S. 8-12

http://dx.doi.org/10.1109/ACSSC.2010.5757455
Weis, Martin; Jannek, Dunja; Günther, Thomas; Husar, Peter; Römer, Florian; Haardt, Martin
Temporally resolved multi-way component analysis of dynamic sources in event-related EEG data using PARAFAC2. - In: Proceedings of EUSIPCO 2010 / EUSIPCO ; 18 (Aalborg) : 2010.08.23-27. - Aalborg, (2010), insges. 5 S.
Römer, Florian; Haardt, Martin
Sum-rate maximization in two-way relaying systems with MIMO amplify and forward relays via generalized eigenvectors. - In: Proceedings of EUSIPCO 2010 / EUSIPCO ; 18 (Aalborg) : 2010.08.23-27. - Aalborg, (2010), insges. 5 S.
Römer, Florian; Zhang, Jianshu; Haardt, Martin; Jorswieck, Eduard
Spectrum and infrastructure sharing in wireless networks: a case study with relay-assisted communications. - In: Conference proceedings / Future Network & Mobile Summit (Florenz) : 2010.06.16-18. - Dublin : IIMC, Internat. Information Management Corp., ISBN 978-1-905824-16-8, (2010), insges. 8 S.

Komulainen, Petri; Tölli, Antti; Song, Bin; Römer, Florian; Björnson, Emil; Bengtsson, Mats
CSI acquisition concepts for advanced antenna schemes in the WINNER+ Project. - In: Conference proceedings / Future Network & Mobile Summit (Florenz) : 2010.06.16-18. - Dublin : IIMC, Internat. Information Management Corp., ISBN 978-1-905824-16-8, (2010), insges. 8 S.

Jorswieck, Eduard A.; Badia, Leonardo; Fahldieck, Torsten; Gesbert, David; Gustafsson, Stefan; Haardt, Martin; Ho, Ka-Ming; Karipidis, Eleftherios; Kortke, Andreas; Larsson, Erik G.
Resource sharing in wireless networks: the SAPHYRE approach. - In: Conference proceedings / Future Network & Mobile Summit (Florenz) : 2010.06.16-18. - Dublin : IIMC, Internat. Information Management Corp., ISBN 978-1-905824-16-8, (2010), insges. 8 S.

Costa, João Paulo Carvalho Lustosa; Römer, Florian; Weis, Martin; Haardt, Martin
Robust R-D parameter estimation via closed-form PARAFAC. - In: 2010 International ITG Workshop on Smart Antennas (WSA) : date: 23 - 24 Feb. 2010, Bremen, Germany. - Piscataway, NJ : IEEE / International ITG Workshop on Smart Antennas (Bremen) : 2010.02.23-24., ISBN 978-1-4244-6070-0, (2010), S. 99-106

http://dx.doi.org/10.1109/WSA.2010.5456382
Costa, João Paulo Carvalho Lustosa; Schulz, Dominik; Römer, Florian; Haardt, Martin; Apolinário, José A.
Robust R-D parameter estimation via closed-form PARAFAC in Kronecker colored environments. - In: 7th International Symposium on Wireless Communication Systems (ISWCS), 2010 : 19 - 22 Sept. 2010. - Piscataway, NJ : IEEE / International Symposium on Wireless Communication Systems ; 7 (York, UK) : 2010.09.19-22., ISBN 978-1-4244-6316-9, (2010), S. 115-119

http://dx.doi.org/10.1109/ISWCS.2010.5624278
Weis, Martin; Jannek, Dunja; Römer, Florian; Günther, Thomas; Haardt, Martin; Husar, Peter
Multi-dimensional PARAFAC2 component analysis of multi-channel EEG data including temporal tracking. - In: Annual international conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2010 : Buenos Aires, Argentina, Aug. 31, 2010 - Sept. 4, 2010. - Piscataway, NJ : IEEE / Annual international conference of the IEEE Engineering in Medicine and Biology Society ; 32 (Buenos Aires) : 2010.08.31-09.04., ISBN 978-1-4244-4123-5, (2010), S. 5375-5378

http://dx.doi.org/10.1109/IEMBS.2010.5626484
Römer, Florian; Becker, Hanna; Haardt, Martin
Analytical performance assessment for multi-dimensional Tensor-ESPRIT-type parameter estimation algorithms. - In: IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2010 : 14 - 19 March 2010, Sheraton Dallas Hotel, Dallas, Texas, USA ; proceedings. - Piscataway, NJ : IEEE / IEEE International Conference on Acoustics, Speech and Signal Processing ; 35 (Dallas, Tex.) : 2010.03.14-19., ISBN 978-1-4244-4295-9, (2010), S. 2598-2601

http://dx.doi.org/10.1109/ICASSP.2010.5496266
Costa, João Paulo Carvalho Lustosa; Römer, Florian; Haardt, Martin
Iterative Sequential GSVD (I-S-GSVD) based prewhitening for multidimensional HOSVD based subspace estimation without knowledge of the noise covariance information. - In: 2010 International ITG Workshop on Smart Antennas (WSA) : date: 23 - 24 Feb. 2010, Bremen, Germany. - Piscataway, NJ : IEEE / International ITG Workshop on Smart Antennas (Bremen) : 2010.02.23-24., ISBN 978-1-4244-6070-0, (2010), S. 151-155

http://dx.doi.org/10.1109/WSA.2010.5456459
Song, Bin; Römer, Florian; Haardt, Martin
Flexible coordinated beamforming (FlexCoBF) algorithm for the downlink of multi-user MIMO systems. - In: 2010 International ITG Workshop on Smart Antennas (WSA) : date: 23 - 24 Feb. 2010, Bremen, Germany. - Piscataway, NJ : IEEE / International ITG Workshop on Smart Antennas (Bremen) : 2010.02.23-24., ISBN 978-1-4244-6070-0, (2010), S. 414-420

http://dx.doi.org/10.1109/WSA.2010.5456393
Römer, Florian; Haardt, Martin
A low-complexity relay transmit strategy for two-way relaying with MIMO amplify and forward relays. - In: IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2010 : 14 - 19 March 2010, Sheraton Dallas Hotel, Dallas, Texas, USA ; proceedings. - Piscataway, NJ : IEEE / IEEE International Conference on Acoustics, Speech and Signal Processing ; 35 (Dallas, Tex.) : 2010.03.14-19., ISBN 978-1-4244-4295-9, (2010), S. 3254-3257

http://dx.doi.org/10.1109/ICASSP.2010.5496039
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
Song, Bin; Römer, Florian; Haardt, Martin
Using a new structured joint congruence (STJOCO) transformation of Hermitian matrices for precoding in multi-user MIMO systems. - In: IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2010 : 14 - 19 March 2010, Sheraton Dallas Hotel, Dallas, Texas, USA ; proceedings. - Piscataway, NJ : IEEE / IEEE International Conference on Acoustics, Speech and Signal Processing ; 35 (Dallas, Tex.) : 2010.03.14-19., ISBN 978-1-4244-4295-9, (2010), S. 3414-3417

http://dx.doi.org/10.1109/ICASSP.2010.5495977
Weis, Martin; Jannek, Dunja; Günther, Thomas; Husar, Peter; Römer, Florian; Haardt, Martin
Space-time-frequency component analysis of visual evoked potentials based on the PARAFAC2 model. - In: Crossing borders within the ABC : automation, biomedical engineering and computer science ; proceedings ; 55. IWK Internationales Wissenschaftliches Kolloquium ; 13 - 17 September 2010. - Ilmenau : Verl. ISLE / Internationales Wissenschaftliches Kolloquium. Technische Universität Ilmenau ; 55 (Ilmenau) : 2010.09.13-17., ISBN 978-3-938843-53-6, (2010), S. 484-487

http://www.db-thueringen.de/servlets/DocumentServlet?id=17081
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
Costa, João Paulo C. L.; Römer, Florian; Haardt, Martin
Sequential GSVD based prewhitening for multidimensional HOSVD based subspace estimation. - In: 2009 International ITG Workshop on Smart Antennas / International ITG Workshop on Smart Antennas (Berlin) : 2009.02.16-18. - Berlin : Heinrich-Hertz-Inst., (2009), S. 205-212
Römer, Florian; Haardt, Martin
Structured least squares (SLS) based enhancements of tensor-based channel estimation (TENCE) for two-way relaying with multiple antennas. - In: 2009 International ITG Workshop on Smart Antennas / International ITG Workshop on Smart Antennas (Berlin) : 2009.02.16-18. - Berlin : Heinrich-Hertz-Inst., (2009), S. 198-204
Costa, Joao Paulo C. L.; Römer, Florian; Haardt, Martin
Deterministic prewhitening to improve subspace based parameter estimation techniques in severely colored noise environments. - In: Information technology and electrical engineering - devices and systems, materials and technologies for the future : proceedings ; 54. IWK ; 07 - 10 September 2009. - Ilmenau : Verl. ISLE / Internationales Wissenschaftliches Kolloquium. Technische Universität Ilmenau, Faculty of Electrical Engineering and Information Technology ; 54 (Ilmenau) : 2009.09.07-10., (2009), insges. 6 S.
http://www.db-thueringen.de/servlets/DocumentServlet?id=14449
Costa, Joao Paulo C. L.; Thakre, Arpita; Römer, Florian; Haardt, Martin
Comparison of model order selection techniques for high-resolution parameter estimation algorithms. - In: Information technology and electrical engineering - devices and systems, materials and technologies for the future : proceedings ; 54. IWK ; 07 - 10 September 2009. - Ilmenau : Verl. ISLE / Internationales Wissenschaftliches Kolloquium. Technische Universität Ilmenau, Faculty of Electrical Engineering and Information Technology ; 54 (Ilmenau) : 2009.09.07-10., (2009), insges. 6 S.
http://www.db-thueringen.de/servlets/DocumentServlet?id=14448
Römer, Florian; Haardt, Martin
Near-far robustness and optimal power allocation for two-way relaying with MIMO amplify and forward relays. - In: 3rd IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP), 2009 : Aruba, 13 - 16 Dec. 2009. - Piscataway, NJ : IEEE / IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing ; 3 (Aruba) : 2009.12.13-16., ISBN 978-1-4244-5180-7, (2009), S. 281-284

http://dx.doi.org/10.1109/CAMSAP.2009.5413278
Römer, Florian; Becker, Hanna; Haardt, Martin; Weis, Martin
Analytical performance evaluation for HOSVD-based parameter estimation schemes. - In: 3rd IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing (CAMSAP), 2009 : Aruba, 13 - 16 Dec. 2009. - Piscataway, NJ : IEEE / IEEE International Workshop on Computational Advances in Multi-Sensor Adaptive Processing ; 3 (Aruba) : 2009.12.13-16., ISBN 978-1-4244-5180-7, (2009), S. 77-80

http://dx.doi.org/10.1109/CAMSAP.2009.5413232
Römer, Florian; Haardt, Martin
Tensor-based channel estimation (TENCE) for two-way relaying with multiple antennas and spatial reuse. - In: IEEE International Conference on Acoustics, Speech and Signal Processing, 2009 : ICASSP 2009 ; 19 - 24 April 2009, Taipei International Convention Center, Taipei, Taiwan ; proceedings. - Piscataway, NJ : IEEE / IEEE International Conference on Acoustics, Speech and Signal Processing ; 34 (Taipei) : 2009.04.19-24., ISBN 978-1-4244-2353-8, (2009), S. 3641-3644

http://dx.doi.org/10.1109/ICASSP.2009.4960415
Römer, Florian; Haardt, Martin
Multidimensional unitary tensor-ESPRIT for non-circular sources. - In: IEEE International Conference on Acoustics, Speech and Signal Processing, 2009 : ICASSP 2009 ; 19 - 24 April 2009, Taipei International Convention Center, Taipei, Taiwan ; proceedings. - Piscataway, NJ : IEEE / IEEE International Conference on Acoustics, Speech and Signal Processing ; 34 (Taipei) : 2009.04.19-24., ISBN 978-1-4244-2353-8, (2009), S. 3577-3580

http://dx.doi.org/10.1109/ICASSP.2009.4960399
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, Bd. 16 (2009), 10, S. 909-912
http://dx.doi.org/10.1109/LSP.2009.2026453
Weis, Martin; Römer, Florian; Haardt, Martin; Jannek, Dunja; Husar, Peter
Multi-dimensional space-time-frequency component analysis of event related EEG data using closed-form PARAFAC. - In: IEEE International Conference on Acoustics, Speech and Signal Processing, 2009 : ICASSP 2009 ; 19 - 24 April 2009, Taipei International Convention Center, Taipei, Taiwan ; proceedings. - Piscataway, NJ : IEEE / IEEE International Conference on Acoustics, Speech and Signal Processing ; 34 (Taipei) : 2009.04.19-24., ISBN 978-1-4244-2353-8, (2009), S. 349-352

http://dx.doi.org/10.1109/ICASSP.2009.4959592
Jannek, Dunja; Römer, Florian; Weis, Martin; Haardt, Martin; Husar, Peter
Identification of signal components in multi-channel EEG signals via closed-form PARAFAC analysis and appropriate preprocessing. - In: 4th European Conference of the International Federation for Medical and Biological Engineering / European Conference of the International Federation for Medical and Biological Engineering ; 4 (Antwerp) : 2008.11.23-27. : ECIFMBE 2008; 23 - 27 November 2008, Antwerp, Belgium. - [Berlin] : Springer, (2009), S. 1226-1230
Olsson, Magnus; Osseiran, Afif; Römer, Florian; Wild, Thorsten
Multi-antenna processing in the WINNER air interface. - In: XXIX General Assembly, 7 - 16 August 2008, Chicago, USA / General Assembly. International Union of Radio Science (URSI) ; 29 (Chicago, Ill.) : 2008.08.07-16. - Chicago : URSI, (2008), insges. 4 S.
Römer, Florian; Haardt, Martin
A closed-form solution for multilinear PARAFAC decompositions. - In: / IEEE Sensor Array and Multichannel Signal Processing Workshop ; 5 (Darmstadt) : 2008.07.21-23., ISBN 978-1-424-42241-8, (2008), S. 487-491

Costa, Joao Paulo C. L.; Haardt, Martin; Römer, Florian
Robust methods based on the HOSVD for estimating the model order in PARAFAC models. - In: / IEEE Sensor Array and Multichannel Signal Processing Workshop ; 5 (Darmstadt) : 2008.07.21-23., ISBN 978-1-424-42241-8, (2008), S. 510-514

Haardt, Martin; Römer, Florian; Stankovic, Veljko; Gale, S.; Jeffries, A.
Multi-user MIMO systems. - In: : ., ISBN 978-0-470-99387-3, (2008), S. 234-242

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. 56Bd. 56.2008, 7, Pt. 2, S. 3198-3213
http://dx.doi.org/10.1109/TSP.2008.917929
Römer, Florian; Haardt, Martin
A closed-form solution for parallel factor (PARAFAC) analysis. - In: IEEE International Conference on Acoustics, Speech and Signal Processing, 2008 : ICASSP ; Las Vegas, NV, March 31, 2008 - April 4, 2008. - Piscataway, NJ : IEEE Service Center / IEEE International Conference on Acoustics, Speech, and Signal Processing (Las Vegas, Nev.) : 2008.03.31-04.04., ISBN 978-1-4244-1483-3, (2008), S. 2365-2368

http://dx.doi.org/10.1109/ICASSP.2008.4518122
Song, Bin; Römer, Florian; Haardt, Martin
Efficient channel quantization scheme for multi-user MIMO broadcast channels with RBD precoding. - In: IEEE International Conference on Acoustics, Speech and Signal Processing, 2008 : ICASSP ; Las Vegas, NV, March 31, 2008 - April 4, 2008. - Piscataway, NJ : IEEE Service Center / IEEE International Conference on Acoustics, Speech, and Signal Processing (Las Vegas, Nev.) : 2008.03.31-04.04., ISBN 978-1-4244-1483-3, (2008), S. 2389-2392

http://dx.doi.org/10.1109/ICASSP.2008.4518128
da Costa, Joao Paulo C. L.; Haardt, Martin; Römer, Florian; Del Galdo, Giovanni
Enhanced model order estimation using higher-order arrays. - In: Conference record of the Forty-First Asilomar Conference on Signals, Systems and Computers, 2007 : ACSSC 2007 ; November 4 - 7, 2007, Pacific Grove, California. - Piscataway, NJ : IEEE Service Center / Asilomar Conference on Signals, Systems and Computers ; 41 (Pacific Grove, Calif.) : 2007.11.04-07., ISBN 978-1-4244-2109-1, (2007), S. 412-416

http://dx.doi.org/10.1109/ACSSC.2007.4487242
Römer, Florian; Haardt, Martin
Tensor-structure structured least squares (TS-SLS) to improve the performance of multi-dimensional Esprit-type algorithms. - In: IEEE International Conference on Acoustics, Speech and Signal Processing, 2007 : ICASSP 2007 ; 15 - 20 April 2007, [Honolulu, Hawaii, USA ; proceedings]. - Piscataway, NJ : IEEE Operations Center / IEEE International Conference on Acoustics, Speech, and Signal Processing ; 32 (Honolulu, Hawaii) : 2007.04.15-20., 2007, S. II-893-II-896

http://dx.doi.org/10.1109/ICASSP.2007.366380
Römer, Florian; Del Galdo, Giovanni; Haardt, Martin
Deterministic Cramér-Rao bounds for strict sense non-circular sources. - In: / International ITG/IEEE Workshop on Smart Antennas (Wien) : 2007.02.26-27., (2007), insges. 5 S.

Römer, Florian; Haardt, Martin; Del Galdo, Giovanni
Higher order SVD based subspace estimation to improve multi-dimensional parameter estimation algorithms. - In: Fortieth Asilomar Conference on Signals, Systems and Computers, 2006 : ACSSC '06 ; Oct. 29, 2006 - Nov. 1, 2006, Pacific Grove, California. - Piscataway, NJ : IEEE / Asilomar Conference on Signals, Systems and Computers ; 40 (Pacific Grove, Calif.) : 2006.10.29-11.01., (2006), S. 961-965

http://dx.doi.org/10.1109/ACSSC.2006.354894
Römer, Florian; Haardt, Martin
Efficient 1-D and 2-D DOA estimation for non-circular sourceswith hexagonal shaped espar arrays. - In: 2006 IEEE International Conference on Acoustics, Speech and Signal Processing, 2006, ICASSP 2006 : 14 - 19 May 2006, [Toulouse, France] ; proceedings. - Piscataway, NJ : IEEE Operations Center / IEEE International Conference on Acoustics, Speech, and Signal Processing (Toulouse) : 2006.05.14-19., 2006, S. IV-881-IV-884

http://dx.doi.org/10.1109/ICASSP.2006.1661110
Römer, Florian
Advances in subspace-based parameter estimation: Tensor-ESPRIT-type methods and non-circular sources. - 160 S
Ilmenau : Techn. Univ., Diplomarbeit, 2006

Hochauflösende Parameterschätzverfahren stellen ein Forschungsgebiet dar, welches bereits seit Jahrzehnten weltweit merkliche Beachtung findet. Die entsprechenden Methoden lassen sich zur Lösung einer Vielzahl von praktischen Problemen verwenden, wie etwa der Radarsignalverarbeitung, bildgebenden Verfahren in der Medizin, Audiokodierung, Mobilkommunikationoder Kanalmodellierung aus Kanalmessdaten. Die hohe Bandbreite an möglichen Anwendungen erklärt auch, warum auf diesem Gebiet nach wie vor sehr aktiv geforscht wird. In dieser Arbeit werden zwei grundsätzliche Fortschritte in diesem Feld diskutiert. Im ersten Teil werden die mehrdimensionalen Signale, die dem Problem zu Grunde liegen, näher beleuchtet. In den meisten bisherigen Verfahren werden diese Signale mit Hilfe von Matrizen dargestellt. Da diese aber nur zweidimensional sind, geben sie die höherdimensionale Struktur der Signale nicht gut wieder. Eine sehr viel geeignetere Repräsentation ist mit Tensoren möglich, die beliebig viele Dimensionen haben können. Diese offensichtliche Feststellung ist Ausgangspunkt dafür, bestehende Verfahren mit Hilfe von Tensoren neu zu entwickeln. Im Ergebnis entstehen neuartige tensor-basierte Methoden, welche in diesem Teil der Arbeit entwickelt und evaluiert werden. Der zweite Teil befasst sich mit einer Klasse von Signalen, die als nicht-zirkuläre Signale bezeichnet werden. Hier wird gezeigt, wie bestehende hochauflösende Parameterschätzverfahren verbessert werden können, wenn die Quellsignale nicht-zirkulär sind. Es werden dann zwei Algorithmen gezeigt, die diese Verbesserungen enthalten und in ihrer Leistungsfähigkeit bewertet. Im letzten Kapitel wird schließlich die Cramér-Rao Schranke für diese Art der Signale hergeleitet, welche eine untere Schranke für den Schätzfehler einer großen Klasse von Schätzverfahren darstellt. Für das hier verwendete Datenmodell wurde diese Schranke in der bisher existierenden Literatur noch nirgends angegeben. Der Anspruch dieser Arbeit ist, die mathematischen Grundlagen für die genannten Fortschritte zu legen und Algorithmen abzuleiten, die diese Erweiterungen beinhalten. Das Hauptaugenmerk liegt also auf den theoretischen Aspekten und weniger auf den Problemen einer praktischen Anwendung dieser Verfahren.


http://www.gbv.de/dms/ilmenau/abs/520807979roeme.txt
Römer, Florian; Haardt, Martin
Using 3-D unitary ESPRIT on a hexagonal shaped ESPAR antenna for 1-D and 2-D doa estimation. - In: / International ITG/IEEE Workshop on Smart Antennas (Duisburg) : 2005.04.04-05., (2005), insges. 8 S.
Haardt, Martin; Römer, Florian
Enhancements of unitary ESPRIT for non-circular sources. - In: / IEEE International Conference on Acoustics, Speech, and Signal Processing (Montreal) : 2004.05.17-21., (2004), S. 101-104