Contact
Christina Bonfert uni-ulm.de
Albert-Einstein-Allee 41
89081 Ulm
Room: 41.2.208
Phone: +49 (0)731 50-26352
Vita
Christina Bonfert (maiden name: Christina Knill) received the B.Sc and M.Sc. degrees in electrical engineering from Ulm University in 2013 and 2015, respectively.
In 2015, she joined the Insitute of Microwave Engineering as an research assistant with research focus on radar signal processing for digital radars with OFDM modulation. She received her doctorate in 2022 with the thesis about "Novel MIMO OFDM waveform designs and high-performance signal processing methods for digital radars"→
Since 2022, she is a postdoctoral research fellow at the institute with research focus on radar signal processing and compressed sensing for UAV-based SAR.
Research
- radar signal processing
- novel modulation and multiplexing approaches for digital radars with focus on OFDM and code modulation
- compressed sensing for radar
- signal processing for UAV-based high-resolution SAR
- compressed sensing applied to SAR
Publications
2025
50.
J. Kanz,
C. Bonfert,
C. Gesell,
A. Grathwohl,
F. Bormuth,
G. Krieger and
C. Waldschmidt,
"Coherent Multistatic UAV-Based SAR",
IEEE Transactions on Radar Systems,
vol. 3,
pp. 1056-1072,
Jul.
2025.
IEEE.
| DOI: | 10.1109/TRS.2025.3593818 |
| Weblink: | https://ieeexplore.ieee.org/document/11104226 |
49.
C. Waldschmidt,
C. Bonfert and
T. Grebner,
Millimeter Wave Radar: Hardware and Signal Processing.
1
Cham:
Springer,
Jul.
2025.
| DOI: | 10.1007/978-3-031-89118-2 |
| ISBN: | 978-3-031-89118-2 |
48.
V. Mustieles-Pérez,
S. Kim,
J. Kanz,
C. Bonfert,
A. Grathwohl,
G. Krieger and
M. Villano,
"Generation of Accurate, High-Resolution Digital Elevation Models From Ultrawideband, Drone-Borne, Repeat-Pass Interferometric SAR",
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing,
vol. 18,
pp. 28375-28392,
2025.
| DOI: | 10.1109/JSTARS.2025.3626140 |
47.
V. Mustieles-Pérez,
S. Kim,
J. Kanz,
C. Bonfert,
A. Grathwohl,
M. Widmann,
F. Bormuth,
G. Krieger and
M. Villano,
"Producing High-Quality Digital Elevation Models from Ultra-Wideband Drone-Borne SAR Interferometry"
in 2025 26th International Radar Symposium (IRS),
2025,
pp. 1-6.
| DOI: | 10.23919/IRS64527.2025.11046023 |
46.
A. Grathwohl,
J. Kanz,
C. Bonfert and
C. Waldschmidt,
"UAV-Based SAR-Imaging of Objects From Arbitrary Trajectories Using Weighted Backprojection",
IEEE Journal of Microwaves,
vol. 5,
no. 4,
pp. 856-867,
2025.
| DOI: | 10.1109/JMW.2025.3575157 |
45.
J. Kanz,
C. Gesell,
C. Bonfert,
D. Werbunat,
A. Grathwohl,
J. Aguilar,
M. Vossiek and
C. Waldschmidt,
UAV-Borne Digital Radar System for Coherent Multistatic SAR Imaging,
2025.
2024
44.
J. Aguilar,
D. Werbunat,
V. Janoudi,
C. Bonfert and
C. Waldschmidt,
"Uncoupled Digital Radars Creating a Coherent Sensor Network",
IEEE Journal of Microwaves,
pp. 1-14,
Jun.
2024.
| DOI: | 10.1109/JMW.2024.3405633 |
| Weblink: | https://ieeexplore.ieee.org/document/10557779 |
43.
C. Bonfert,
E. Ruopp and
C. Waldschmidt,
"Improving SAR Imaging by Superpixel-Based Compressed Sensing and Backprojection Processing",
IEEE Transactions on Geoscience and Remote Sensing,
vol. 62,
pp. 1—12,
Apr.
2024.
https://ieeexplore.ieee.org/document/10491303/.
| DOI: | 10.1109/TGRS.2024.3385027 |
42.
J. Kanz,
C. Bonfert,
R. Riekenbrauck and
C. Waldschmidt,
"Bistatic UAV-Based Repeater SAR for 3D Object Localization"
in EUSAR 2024; 15th European Conference on Synthetic Aperture Radar,
Apr.
2024.
| File: | https://doi.org/10.18725/OPARU-53904 |
41.
D. Schwarz,
M. Linder,
V. Kienle,
C. Bonfert and
C. Waldschmidt,
"Time and Frequency Division Multiplexing in High-Resolution Imaging Radars with LO Feedthrough Topology"
in ICMIM 2024 - International Conference on Microwaves for Intelligent Mobility,
Boppard,
April 2024,
Berlin - Offenbach:
VDE VERLAG GmbH,
Apr.
2024,
pp. 22-25.
| ISBN: | 978-3-8007-6364-1 |
| Weblink: | https://www.vde-verlag.de/buecher/456363/itg-fb-315-icmim-2024.html 07.10.2024 |
| File: | https://doi.org/10.18725/OPARU-53903 |
40.
V. Mustieles-Pérez,
J. Kanz,
C. Bonfert,
A. Grathwohl,
L. L. Lamberti,
S. Kim,
G. Krieger and
M. Villano,
"Experimental Demonstration of UAV-Based Ultra-Wideband Multi-Baseline SAR Interferometry"
in European Conference on Synthetic Aperture Radar,
2024,
pp. 1156—1161.
| ISBN: | 978-3-8007-6286-6 |
39.
M. Lahmeri,
W. R. Ghanem,
C. Bonfert and
R. Schober,
"Robust Trajectory and Resource Optimization for Communication-Assisted UAV SAR Sensing",
IEEE Open Journal of the Communications Society,
vol. 5,
pp. 3212-3228,
2024.
| DOI: | 10.1109/OJCOMS.2024.3396922 |
38.
I. Ullmann,
C. Bonfert,
A. Grathwohl,
M. A. Lahmeri,
V. Mustieles-Pérez,
J. Kanz,
E. Sterk,
F. Bormuth,
R. Ghasemi,
P. Fenske,
M. Villano,
R. Schober,
R. F. H. Fischer,
G. Krieger,
C. Damm,
C. Waldschmidt and
M. Vossiek,
"Towards Detecting Climate Change Effects With UAV-Borne Imaging Radars",
IEEE Journal of Microwaves,
pp. 1-13,
2024.
| DOI: | 10.1109/JMW.2024.3450015 |
2023
37.
D. Werbunat,
B. Woischneck,
J. Lerch,
B. Schweizer,
R. Michev,
C. Bonfert,
J. Hasch and
C. Waldschmidt,
"Multichannel Repeater for Coherent Radar Networks Enabling High-Resolution Radar Imaging",
IEEE Transactions on Microwave Theory and Techniques,
Nov.
2023.
https://ieeexplore.ieee.org/document/10335758.
| DOI: | 10.1109/TMTT.2023.3326284 |
36.
V. Mustieles Pérez,
S. Kim,
G. Krieger,
M. Villano,
J. Kanz,
A. Grathwohl,
C. Bonfert and
L. L. Lamberti,
"Towards UAV-Based Multi-Baseline Interferometry for Accurate
Digital Elevation Model Generation"
in Proc. 2023 Kleinheubach Conference (KHB~2023),
Miltenberg, Germany,
Sep.
2023.
| ISBN: | 978-3-948571-08-5 |
35.
D. Werbunat,
B. Schweizer,
M. Maier,
C. Bonfert,
D. Schindler,
P. Hinz,
J. Hasch and
C. Waldschmidt,
"An All-Digital Carrier Synthesis for Stepped OFDM Radars",
Jun.
2023.
34.
D. Schwarz,
M. Linder,
C. Bonfert and
C. Waldschmidt,
"Improving the Image Quality in High-Resolution 4D Radars with Sparse Arrays by Compressed Sensing"
in International Conference on Electromagnetics in Advanced Applications (ICEAA),
2023.
| DOI: | 10.1109/ICEAA57318.2023.10297850 |
| File: | http://dx.doi.org/10.18725/OPARU-51252 |
33.
V. Mustieles-Pérez,
S. Kim,
C. Bonfert,
G. Krieger and
M. Villano,
"Towards UAV-Based Ultra-Wideband Multi-Baseline SAR Interferometry"
in 2023 20th European Radar Conference (EuRAD),
2023,
pp. 233-236.
| DOI: | 10.23919/EuRAD58043.2023.10289564 |
2022
32.
A. Grathwohl,
M. Stelzig,
J. Kanz,
P. Fenske,
A. Benedikter,
C. Knill,
I. Ullmann,
I. Hajnsek,
A. Moreira,
G. Krieger,
M. Vossiek and
C. Waldschmidt,
"Taking a Look Beneath the Surface: Multicopter UAV-Based Ground-Penetrating Imaging Radars",
IEEE Microwave Magazine,
vol. 23,
no. 10,
pp. 32-46,
2022.
| DOI: | 10.1109/MMM.2022.3188126 |
31.
M. Lahmeri,
W. Ghanem,
C. Knill and
R. Schober,
"Trajectory and Resource Optimization for UAV Synthetic Aperture Radar"
in 2022 IEEE Globecom Workshops (GC Wkshps),
2022,
pp. 897-903.
| DOI: | 10.1109/GCWkshps56602.2022.10008658 |
2021
30.
C. Knill,
F. Embacher,
B. Schweizer,
S. Stephany and
C. Waldschmidt,
"Coded OFDM Waveforms for MIMO Radars",
IEEE Transactions on Vehicular Technology,
pp. 1-1,
2021.
| DOI: | 10.1109/TVT.2021.3073268 |
| File: |  https://mwt-www.e-technik.uni-ulm.de/world/data/downloads/papers/2021/2021_TVT_Knill_Coded_OFDM_Waveforms_for_MIMO_Radars.pdf |
29.
C. Knill,
B. Schweizer,
S. Stephany,
D. Werbunat and
C. Waldschmidt,
"FMCW-Interference of Frequency Agile OFDM Radars"
in European Radar Conference (EuRAD),
2021,
pp. 160-163.
| DOI: | 10.1109/EuRAD48048.2021.00050 |
| File: | https://mwt-www.e-technik.uni-ulm.de/world/data/downloads/papers/2020/2020_EuRAD_Knill_FMCW_Interference_of_Frequency_Agile_OFDM_Radars.pdf |
28.
D. Werbunat,
F. Sgroi,
C. Knill,
B. Schweizer,
B. Meinecke,
R. Michev,
J. Hasch and
C. Waldschmidt,
"Multiplexing of OFDM-Based Radar Networks"
in 2021 IEEE Radar Conference (RadarConf21),
2021,
pp. 1-6.
| DOI: | 10.1109/RadarConf2147009.2021.9455150 |
27.
B. Schweizer,
C. Knill,
D. Werbunat,
S. Stephany and
C. Waldschmidt,
"Mutual Interference of Automotive OFDM Radars—Analysis and Countermeasures",
IEEE Journal of Microwaves,
vol. 1,
no. 4,
pp. 950-961,
2021.
| DOI: | 10.1109/JMW.2021.3110164 |
26.
D. Schindler,
B. Schweizer,
C. Knill,
J. Hasch and
C. Waldschmidt,
"Synthetization of Virtual Transmit Antennas for MIMO OFDM Radar by Space-Time Coding",
IEEE Transactions on Aerospace and Electronic Systems,
vol. 57,
no. 3,
pp. 1964-1971,
2021.
| DOI: | 10.1109/TAES.2020.3046332 |