Univ.-Prof. Dr.-Ing. Del Galdo, GiovanniUniv.-Prof. Dr.-Ing. Del Galdo, Giovanni
Prof. Dr.-Ing. Giovanni Del GaldoTU Ilmenau
Prof. Dr.-Ing. Giovanni Del Galdo

Kontakt

Telefon: +49 3677 69-4280
Büro: Helmholtzbau, Raum 2502
Adresse: Technische Universität Ilmenau
  Fakultät für Elektrotechnik und Informationstechnik
  Fachgebiet Elektronische Messtechnik und Signalverarbeitung
  Postfach 100 565
  98684 Ilmenau

Kurzvita

Giovanni Del Galdo erhielt 2002 den Laurea-Abschluss in Nachrichtentechnik vom Politecnico di Milano, Mailand, Italien. Im Jahr 2007 erlangte er unter der Anleitung von Prof. Martin Haardt den Dr.-Ing.-Grad an der Technischen Universität Ilmenau, Ilmenau, Deutschland. Seine Dissertation mit dem Titel "Geometry-based Channel Modeling for Multi-User MIMO Systems and Applications" kann hier  heruntergeladen werden.

 

Anschließend trat er der Gruppe Communication Acoustics als Senior Scientist in der Abteilung Audio des Fraunhofer-Instituts für Integrierte Schaltungen IIS bei. Hier war er auch Mitglied der International Audio Laboratories Erlangen (AudioLabs) in Zusammenarbeit mit der Friedrich-Alexander-Universität Erlangen-Nürnberg. Seine Forschung konzentrierte sich auf Audio-Watermarking und parametrische Darstellungen räumlichen Klangs.

 

Seit 2012 leitet er eine Forschungsgruppe, bestehend aus einer Abteilung am Fraunhofer IIS und einem Fachgebiet (Lehrstuhl) an der TU Ilmenau. Im Jahr 2016 fusionierte die Gruppe mit dem Fachgebiet für Elektronische Messtechnik unter der Leitung von Prof. Reiner Thomä und wurde zur Gruppe Elektronische Messtechnik und Signalverarbeitung (EMS), die derzeit etwa 60 Mitarbeitende umfasst.

 

Seine aktuellen Forschungsinteressen umfassen:

• Analyse, Modellierung und Entwurf multidimensionaler Signale und Systeme

• Messtechnik für multidimensionale Charakterisierung (z. B. MIMO-Channel Sounding) bis zu Sub-THz-Frequenzen, von kostengünstigen SDR-Lösungen bis zu leistungsstarker spezialisierter Hardware

• Over-The-Air (OTA)-Tests für terrestrische und satellitengestützte drahtlose Systeme (Kommunikation und Navigation)

• Hochauflösende Parameterabschätzung, Compressed Sensing und Methoden Sparsity Promoting Rekonstruktionsverfahren

 

Akademische Forschungsmetriken:

Google Scholar

ResearchGate

Web of Science (publons)

 

Webpräsenz und soziale Medien:

ORCID: 0000-0002-7195-4253

IEEE Xplore-Seite

LinkedIn

Strava

Publikationen

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Smeenk, Carsten; Wegner, Tim Erich; Kropp, Gerrit; Trabert, Johannes; Del Galdo, Giovanni
Localization and navigation of service robots by means of M-sequence UWB radars. - In: 2021 18th European Radar Conference, (2022), S. 189-192

The use of service robots has become much more relevant in industry and retail in recent years. To be of best possible benefit to humans, an autonomous motion ability of the service robots is of central importance. This requires that the robot can perceive its surroundings as precisely as possible by using different sensors and their fusion. In contrast to optical sensors, an UWB sensor can, for example, detect small and almost invisible objects such as glass panes with high range resolution. In this paper, a signal processing chain for detection of the environment with M-sequence UWB sensors is proposed. The proposed chain includes pulse reconstruction based on calibration measurements, background subtraction, object detection based on CFAR techniques, and multi-target tracking based on the Kalman filter and the nearest-neighbor approach.



https://doi.org/10.23919/EuRAD50154.2022.9784511
Engelhardt, Maximilian; Andrich, Carsten; Ihlow, Alexander; Del Galdo, Giovanni
RF performance of USRP TwinRX daughterboard under influence of strong interferers. - In: 16th European Conference on Antennas and Propagation, (2022), insges. 5 S.

In this paper, we investigate the sensitivity of the software-defined radio (SDR) universal software radio peripheral (USRP) X310 with a TwinRX daughterboard to strong interferers. In a conducted test setup, the signal-to-interference-plus-noise ratio (SINR) is measured under the influence of a mock-up Long-Term Evolution (LTE) base station. The frequency of the interferer is varied to analyze the effects over a wide frequency band, whereby a distinction is made between signals inside and outside the intermediate frequency (IF) band. The former can cause clipping at the analog-to-digital converter (ADC), while the latter are to be suppressed in the analog part of the software-defined radio. Here, leakage and higher-order mixing products make the receiver sensitive to spurious frequencies, whereby the performance degradation is particularly noticeable near the first intermediate frequency (IF1) of 1.25 GHz. At this point, even an interference signal with −28 dBm peak envelope power (PEP) causes an SINR loss of 3 dB.



https://doi.org/10.23919/EuCAP53622.2022.9769615
Dupleich, Diego; Han, Niu; Ebert, Alexander; Müller, Robert; Ludwig, Stephan; Artemenko, Alexander; Eichinger, Josef; Geiss, Tobias; Del Galdo, Giovanni; Thomä, Reiner
From sub-6 GHz to mm-wave: simultaneous multi-band characterization of propagation from measurements in industry scenarios. - In: 16th European Conference on Antennas and Propagation, (2022), insges. 5 S.

In the present paper we introduce simultaneous multi-band measurements at sub-6 GHz and two mm-wave bands with the objective of characterizing propagation for multi-band channel modelling purposes in industry scenarios. The marginal power profiles show that the dominant scatterers are common in the different frequencies. In addition, a relation of decreasing average delay and angular spreads with increasing frequency is observed. The different measured parameters are contrasted with the 3GPP model for indoor factories.



https://ieeexplore.ieee.org/document/9768944
Wegner, Tim Erich; Gebhardt, Stefan; Del Galdo, Giovanni
Level measurement of low-permittivity material using an M-sequence UWB radar. - In: 16th European Conference on Antennas and Propagation, (2022), insges. 5 S.

Due to increasingly complex and automated manufacturing processes, the demands on the control parameters of these processes are also increasing. One parameter is the fill quantity of e.g. liquids in production plants, whose precise determination is of ever growing importance. Up to now, the exact level determination under difficult conditions, such as high ambient temperatures, has been a particular challenge. This paper demonstrates a novel method by which an M-sequence UWB radar can determine levels of low-permittivity materials in small metal containers. For this purpose, hot melt is used as an example. Thus, the influence of large temperature differences on the long-term stability of level measurement can also be investigated. The measurements show that the level of hot melt can be measured long-term stable with an accuracy of better than 3 mm.



https://ieeexplore.ieee.org/document/9769405
Engelhardt, Maximilian; Beuster, Julia; Andrich, Carsten; Ihlow, Alexander; Del Galdo, Giovanni
Fast gain switching on TwinRX USRPs. - In: 16th European Conference on Antennas and Propagation, (2022), insges. 5 S.

In this paper, we investigate the gain switching performance of the software-defined radio (SDR) universal software radio peripheral (USRP) X310 with the TwinRX daughterboard and propose a method to optimize it for fast transitions. This receiver uses a complex structure of two switchable amplifiers and two digital step attenuators to realize the wide gain setting range of up to 92 dB. Our measurements of the settling time show that the bulk of transitions between two gain settings take below 1.5 µs, but some require more than 50 µs, caused by the power-up of the switchable amplifiers. Based on this knowledge, we propose a modified switching regime, in which the amplifiers are not toggled in time-critical phases, e.g., during a running measurement, so that a transition time of 1.5 µs can be reliably realized. Thus, a gain switching range of 62 dB is achieved, within which, for example, a fast automatic gain control can be realized.



https://doi.org/10.23919/EuCAP53622.2022.9769488
Soleymani, Dariush M.; Gholamian, Mohammad Reza; Del Galdo, Giovanni; Mückenheim, Jens; Mitschele-Thiel, Andreas
Open sub-granting radio resources in overlay D2D-based V2V communications. - In: EURASIP journal on wireless communications and networking, ISSN 1687-1499, Bd. 2022 (2022), 46, S. 1-29
Richtiger Name des Verfassers: Dariush Mohammad Soleymani

Capacity, reliability, and latency are seen as key requirements of new emerging applications, namely vehicle-to-everything (V2X) and machine-type communication in future cellular networks. D2D communication is envisaged to be the enabler to accomplish the requirements for the applications as mentioned earlier. Due to the scarcity of radio resources, a hierarchical radio resource allocation, namely the sub-granting scheme, has been considered for the overlay D2D communication. In this paper, we investigate the assignment of underutilized radio resources from D2D communication to device-to-infrastructure communication, which are moving in a dynamic environment. The sub-granting assignment problem is cast as a maximization problem of the uplink cell throughput. Firstly, we evaluate the sub-granting signaling overhead due to mobility in a centralized sub-granting resource algorithm, dedicated sub-granting radio resource (DSGRR), and then a distributed heuristics algorithm, open sub-granting radio resource (OSGRR), is proposed and compared with the DSGRR algorithm and no sub-granting case. Simulation results show improved cell throughput for the OSGRR compared with other algorithms. Besides, it is observed that the overhead incurred by the OSGRR is less than the DSGRR while the achieved cell throughput is yet close to the maximum achievable uplink cell throughput.



https://doi.org/10.1186/s13638-022-02128-0
Grundhöfer, Lars; Rizzi, Filippo Giacomo; Gewies, Stefan; Hoppe, Michael; Del Galdo, Giovanni
Improving medium frequency R-Mode ranging with GMSK modulation. - In: Proceedings of the 34th International Technical Meeting of the Satellite Division of the Institute of Navigation, (2021), S. 3227-3233

The R-Mode terrestrial navigation system evaluates the phase of two carriers next to a modulated signal, from which a range can be derived to allow positioning using different stations. To improve the accuracy of ranging, we propose in this paper to replace the currently used Minimum Shift Keying (MSK) modulation with Gaussian Minimum Shift Keying (GMSK). By applying a Gaussian pulse shape for the bit transition to that of the MSK a higher spectral efficiency is achieved. If the data rate is kept constant, this reduces the energy of the modulated signal within the bandwidth of the phase estimator. This increases the accuracy of the added carrier estimate and achieves our goal of improved distance-estimation accuracy. In this paper, we compare the estimates for an R-Mode signal with MSK and two different GMSK modulations. The increased accuracy is verified using software and hardware in-the-loop simulations.



Wagner, Christoph; Gläser, Georg; Sasse, Thomas; Kell, Gerald; Del Galdo, Giovanni
Make some noise: energy-efficient 38 Gbit/s wide-range fully-configurable linear feedback shift register. - In: SMACD / PRIME 2021, (2021), S. 384-387

https://ieeexplore.ieee.org/document/9547997
Wagner, Christoph; Gläser, Georg; Kell, Gerald; Del Galdo, Giovanni
Every clock counts - 41 GHz wide-range integer-N clock divider. - In: SMACD / PRIME 2021, (2021), S. 388-391

https://ieeexplore.ieee.org/document/9547998
Grundhöfer, Lars; Rizzi, Filippo Giacomo; Gewies, Stefan; Hoppe, Michael; Bäckstedt, Jesper; Dziewicki, Marek; Del Galdo, Giovanni
Positioning with medium frequency R-Mode. - In: Navigation, ISSN 2161-4296, Bd. 68 (2021), 4, S. 829-841

R-Mode is a terrestrial navigation system under development for the maritime domain that provides backup in case of a GNSS outage. This paper describes the first test results for real-time positioning on board a ship using medium frequency R-Mode signals. The estimation and positioning algorithms used are described in detail and it is shown how they are integrated into the R-Mode receiver developed by the German Aerospace Center. Moreover, during two daytime experiments with lower and higher dynamic movements of a ship in the Baltic Sea, we were able to achieve a 95% horizontal positioning accuracy of better then 12 m in the center of three R-Mode transmitters. This demonstrates the first time that the medium frequency R-Mode has provided positioning at sea.



https://doi.org/10.1002/navi.450