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

Anzahl der Treffer: 253
Erstellt: Sat, 24 Feb 2024 01:04:26 +0100 in 0.0963 sec


Vintimilla, Renato Zea; Lorenz, Mario; Muchhal, Nitin; Landmann, Markus; Del Galdo, Giovanni
Demonstration and validation of a 3D wave field synthesis setup for multiple GNSS satellite emulation via over-the-air testing. - In: AMTA 2023 proceedings, (2023), insges. 10 S.

Wireless devices supporting global navigation satellite systems (GNSS) services have become an essential tool in different areas of technology such as agriculture, construction, automotive, etc. Therefore the performance and reliability of such devices are important aspects that need to be addressed in the testing stage during the development of the units. The integration of the Over-the-Air (OTA) testing method with the 3D Wave Field Synthesis (3DWFS) technique offer not only the benefit of having tests under controllable and repeatable conditions but also the ability to recreate complex and realistic scenarios in a controlled environment with full polarimetric support for the testing of wireless devices. This contribution applies this technology to emulate a GNSS scenario within an anechoic chamber. For the results validation, a realistic GNSS outdoor scenario was recorded and compared with the emulated scenario where 3DWFS was applied for each individual satellite. This represents a significant step for the GNSS community and also for the future development and testing of wireless devices.



https://doi.org/10.23919/AMTA58553.2023.10293372
Ravelo, Carlos; Martín-Sacristán, David; Shah, Syed Najaf Haider; Smeenk, Carsten; Del Galdo, Giovanni; Monserrat, Jose F.
Sensing resources reduction for vehicle detection with integrated sensing and communications. - In: 2023 IEEE 97th Vehicular Technology Conference (VTC2023-Spring), (2023), insges. 5 S.

Integrated Sensing and Communications (ISAC) aims at incorporating radar and communications functionalities into a single system, achieving higher spectral efficiency through their joint operation. This paper proposes a methodology for reducing resource elements and scanning beams used in the target detection stage of ISAC. Building upon the well-known symbol domain Orthogonal Frequency Division Multiplexing (OFDM) ISAC processing algorithm, its relevant characteristics and limits are considered to minimize the periodicity of sensing resource elements. Moreover, a methodology for finding the required beams to sense a scenario using the radar range equation in a link-budget analysis is proposed and later illustrated via simulations. The simulations show that it is possible to cover a road scenario using a limited number of beams and resource elements from a New Radio (NR) OFDM frame.



https://doi.org/10.1109/VTC2023-Spring57618.2023.10199358
Gedschold, Jonas; Semper, Sebastian; Thomä, Reiner; Döbereiner, Michael; Del Galdo, Giovanni
Dynamic delay-dispersive UWB-radar targets: modeling and estimation. - In: IEEE transactions on antennas and propagation, ISSN 1558-2221, Bd. 71 (2023), 8, S. 6814-6829

This publication proposes a parametric data model and a gradient-based maximum likelihood estimator suitable for the description of delay-dispersive responses of multiple dynamic ultrawideband (UWB)-radar targets. The target responses are estimated jointly with the global target parameters range and velocity. The large relative bandwidth of UWB has consequences for model-based parameter estimation. On the one hand, the Doppler effect leads to a dispersive response in the Doppler spectrum and to a coupling of the target parameters that both need to be considered during modeling and estimation. On the other hand, the shape of an extended target results in a dispersive response in range, which can be resolved by the radar resolution. We consider this extended response as a parameter of interest, e.g., for the purpose of target recognition. Hence, we propose an efficient description and estimation of it by a finite impulse response (FIR) structure only imposing a restriction on the target’s dispersiveness in range. We evaluate the approach on simulations, compare it to state-of-the-art solutions, and provide a validation of the FIR model on measurements of a static scenario.



https://doi.org/10.1109/TAP.2023.3287672
Wegner, Tim Erich; Gebhardt, Stefan; Del Galdo, Giovanni
Fill level measurement of low-permittivity material using an M-sequence UWB radar. - In: International journal of microwave and wireless technologies, ISSN 1759-0795, (2023), S. 1-9

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 of 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 to be long-term stable with an accuracy of better than 3 mm. Furthermore, the precise determination of the empty state is highly important for many applications. For this reason, this paper shows a method for determining the empty state without complex calibration procedures. For the empty level indication, an accuracy of up to 0.5 mm could be achieved for molten hot glue and 3% of the tank volume, independent of the shape or aggregate state of the medium.



https://doi.org/10.1017/S1759078723000739
Eltohamy, Ali; Alazab Elkhouly, Mostafa; Große, Peter; Landmann, Markus; Del Galdo, Giovanni
Efficient phased array radiation pattern evaluation for 5G and SatCom On-The-Move (SOTM) applications. - In: 17th European Conference on Antennas and Propagation (EuCAP 2023), (2023), insges. 5 S.

In satellite communications, it is becoming challenging to provide the tracking performance which is required for Non-Geostationary Orbit (NGSO) constellations with the traditional Satellite Communications (SatCom) On The Move (SOTM) terminal structure which employs bulky parabolic antennas. On the other hand, in terrestrial networks, the single omnidirectional communication with User Equipment (UE) does not provide enough throughput to fulfill the need for higher speed connections. As a consequence, manufacturers started to invest in developing new terminals which use phased array antennas to enable beamforming to increase the directivity and null the interference in terrestrial networks and to provide rapid tracking performance as well as seamless handovers in SOTM. However, this generates new challenge as these antennas change beam patterns depending on the beam steering angle. It is not trivial to evaluate the performance of beamforming antennas since the measurement of the high number of beam patterns that the phased array can form in all directions is time consuming. In this paper, we propose a methodology to measure a large number of beam patterns of a phased array antenna in a more time efficient approach compared to traditional antenna measurement methods. The measured patterns can be used to evaluate the antenna performance and capabilities in different conditions and verify the terminal ability to fulfill the requirements specified by the standards.



https://doi.org/10.23919/EuCAP57121.2023.10132956
Bräunlich, Niklas; Wagner, Christoph; Sachs, Jürgen; Del Galdo, Giovanni
Configurable pseudo noise radar imaging system enabling synchronous MIMO channel extension. - In: Sensors, ISSN 1424-8220, Bd. 23 (2023), 5, 2454, insges. 27 S.

In this article, we propose an evolved system design approach to ultra-wideband (UWB) radar based on pseudo-random noise (PRN) sequences, the key features of which are its user-adaptability to meet the demands provided by desired microwave imaging applications and its multichannel scalability. In light of providing a fully synchronized multichannel radar imaging system for short-range imaging as mine detection, non-destructive testing (NDT) or medical imaging, the advanced system architecture is presented with a special focus put on the implemented synchronization mechanism and clocking scheme. The core of the targeted adaptivity is provided by means of hardware, such as variable clock generators and dividers as well as programmable PRN generators. In addition to adaptive hardware, the customization of signal processing is feasible within an extensive open-source framework using the Red Pitaya® data acquisition platform. A system benchmark in terms of signal-to-noise ratio (SNR), jitter, and synchronization stability is conducted to determine the achievable performance of the prototype system put into practice. Furthermore, an outlook on the planned future development and performance improvement is provided.



https://doi.org/10.3390/s23052454
Wegner, Tim Erich; Gebhardt, Stefan; Del Galdo, Giovanni
Fill level measurements using an M-sequence UWB radar. - In: International journal of microwave and wireless technologies, ISSN 1759-0795, Bd. 15 (2023), 1, S. 74-81

Due to increasingly complex and automated manufacturing processes, the demands on the control parameters of these processes are also increasing. In many applications, such a parameter is the fill quantity, whose precise determination is of ever growing importance. This paper shows with which accuracy and precision an M-sequence ultra-wideband radar can determine levels in small metallic and non-metallic containers with contact-based and contactless measurements. First, the principle of level measurement using guided wave radar is explained and the measurement setup is described. Afterward, the measurement results are shown and discussed. The measurements show that the level can be measured with an accuracy of better than 0.5 mm. In addition, level fluctuations can be detected with a precision of 3 μm. Based on the results of the guided wave radar, the possibilities of volumetric contactless measurement using an electrically small patch antenna are discussed. A particular challenge in contactless level measurement is the high number of multipath components, which strongly influence the accuracy. In addition, there are near-field effects when measuring close to the antenna. Exploiting these near-field effects, an additional method to accurately determine the full state of the container is investigated.



https://doi.org/10.1017/S1759078722000502
Ahmed, Shayan; Gedschold, Jonas; Wegner, Tim Erich; Sode, Adrian; Trabert, Johannes; Del Galdo, Giovanni
Labeling custom indoor point clouds through 2D semantic image segmentation. - In: 2022 Sixth IEEE International Conference on Robotic Computing, (2022), S. 261-264

For effective Computer Vision (CV) applications, one of the difficult challenges service robots have to face concerns with complete scene understanding. Therefore, various strategies are employed for point-level segregation of the 3D scene, such as semantic segmentation. Currently Deep Learning (DL) based algorithms are popular in this domain. However, they require precisely labeled ground truth data. Generating this data is a lengthy and expensive procedure, resulting in a limited variety of available data. On the contrary, the 2D image domain offers labeled data in abundance. Therefore, this study explores how we can achieve accurate labels for the 3D domain by utilizing semantic segmentation on 2D images and projecting the estimated labels to the 3D space via the depth channel. The labeled data may then be used for vision related tasks such as robot navigation or localization.



https://doi.org/10.1109/IRC55401.2022.00050
Vintimilla, Renato Zea; Lorenz, Mario; Landmann, Markus; Del Galdo, Giovanni
Emulation of electromagnetic plane waves for 3D antenna pattern estimation. - In: 2022 IEEE 96th Vehicular Technology Conference:(VTC 2022-Fall), (2022), insges. 6 S.

With the fast development of wireless devices, over-the-air (OTA) testing is becoming the preferred method among developers and manufacturers of wireless equipment. The ability to recreate a scenario under controllable and repeatable conditions keeps the method under constant development, providing new features that increase the realism during the tests. A recent proof of that is the integration of 3D wave field synthesis (3DWFS) to OTA testing, which becomes a significant step to accurately emulate wireless scenarios within a controlled environment.In this context, this contribution improves the OTA system calibration for 3DWFS; efficiently increasing the emulation quality of electromagnetic plane waves impinging from any angular position within an anechoic chamber. In fact, this enhancement implicitly delivers a new method for accurate estimation of the antenna radiation pattern in 3D. This is not only a highly demanded application among antenna manufacturers but in this case also proves the validity of the results and consolidates the integration of 3DWFS to OTA testing.



https://doi.org/10.1109/VTC2022-Fall57202.2022.10013008
Meyer, Lukas; Gedschold, Jonas; Wegner, Tim Erich; Del Galdo, Giovanni; Kalisz, Adam
Enhancement of vision-based 3D reconstruction systems using radar for smart farming. - In: 2022 IEEE International Workshop on Metrology for Agriculture and Forestry, (2022), S. 155-159

Digital field recordings are central to most precision agriculture systems since they can replicate the physical environment and thus monitor the state of an entire field or individual plants. Using different sensors, such as cameras and radar, data can be collected from various domains. Through the combination of radio wave propagation and visible light phenomena, it is possible to enhance, e.g., the optical condition of a fruit with internal parameters such as the water content. This paper proposes a method to correct sensor errors to perform data fusion. As an example, we observe a watermelon with camera and radar sensors and present a system architecture for the visualization of both sensors. For this purpose, we constructed a handheld platform on which both sensors are mounted. In our report, the radar is analyzed in terms of systematic and stochastic errors to formulate an angle-dependent mapping function for error correction. It is successfully shown that camera and radar data are correctly assigned with a watermelon used as a target object, demonstrated by a 3D reconstruction. The proposed system shows promising results for sensor overlay, but radar data remain challenging to interpret.



https://doi.org/10.1109/MetroAgriFor55389.2022.9964699