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
2021
25.
B. Schweizer,
A. Grathwohl,
G. Rossi,
P. Hinz,
C. Knill,
S. Stephany,
H. J. Ng and
C. Waldschmidt,
"The Fairy Tale of Simple All-Digital Radars: How to Deal With 100 Gbit/s of a Digital Millimeter-Wave MIMO Radar on an FPGA [Application Notes]",
IEEE Microwave Magazine,
vol. 22,
no. 7,
pp. 66-76,
2021.
| DOI: | 10.1109/MMM.2021.3069602 |
2020
24.
C. Knill,
B. Schweizer and
C. Waldschmidt,
"Interference-Robust Processing of OFDM Radar Signals Using Compressed Sensing",
IEEE Sensors Letters,
vol. 4,
no. 4,
pp. 1-4,
Apr.
2020.
IEEE.
| DOI: | 10.1109/LSENS.2020.2980165 |
| File: |  https://mwt-www.e-technik.uni-ulm.de/world/data/downloads/papers/2020/2020_SensorsLetter_Knill_Interference_Robust_Processing_OFDM.pdf |
23.
B. Schweizer,
C. Knill,
D. Schindler and
C. Waldschmidt,
"IQ-Imbalance Compensation for Wideband OFDM-Radar"
in 2020 14th European Conference on Antennas and Propagation (EuCAP),
2020,
pp. 1-5.
| DOI: | 10.23919/EuCAP48036.2020.9135665 |
22.
P. Hügler,
T. Grebner,
C. Knill and
C. Waldschmidt,
"UAV-Borne 2-D and 3-D Radar-Based Grid Mapping",
IEEE Geoscience and Remote Sensing Letters,
pp. 1-5,
2020.
| DOI: | 10.1109/LGRS.2020.3025109 |
| File: | https://mwt-www.e-technik.uni-ulm.de/world/data/downloads/papers/2020/2020_GRSL_Huegler_UAV-Borne_2-D_and_3-D_Radar-Based_Grid_Mapping.pdf |
2019
21.
F. Roos,
P. Hügler,
C. Knill,
L. L. Tovar Torres,
N. Appenrodt,
J. Dickmann and
C. Waldschmidt,
"Comparison of 2D and 3D Compressed Sensing for High-Resolution TDM-MIMO Radars"
in European Radar Conference,
Oct.
2019.
| File: | https://mwt-www.e-technik.uni-ulm.de/world/data/downloads/papers/2019/2019_EuMW_Roos_Comparison_of_2D_and_3D_Compressed_Sensing_for_High_Resolution_TDM_MIMO_Radars.pdf |
20.
F. Roos,
J. Bechter,
C. Knill,
B. Schweizer and
C. Waldschmidt,
"Radar Sensors for Autonomous Driving: Modulation Schemes and Interference Mitigation",
IEEE Microwave Magazine,
vol. 20,
no. 9,
pp. 58-72,
Sep.
2019.
19.
C. Knill,
F. Roos,
B. Schweizer,
D. Schindler and
C. Waldschmidt,
"Random Multiplexing for an MIMO-OFDM Radar With Compressed Sensing-Based Reconstruction",
IEEE Microwave and Wireless Components Letters,
vol. 29,
no. 4,
pp. 300--302,
Apr.
2019.
| DOI: | 10.1109/LMWC.2019.2901405 |
| File: | https://mwt-www.e-technik.uni-ulm.de/world/data/downloads/papers/2019/2019_MWCL_Knill_Random_Multiplexing_MIMO_OFDM.pdf |
18.
F. Roos,
P. Hügler,
L. L. Tovar Torres,
C. Knill,
J. Schlichenmaier,
C. Vasanelli,
N. Appenrodt,
J. Dickmann and
C. Waldschmidt,
"Compressed Sensing based Single Snapshot DoA Estimation for Sparse MIMO Radar Arrays"
in German Microwave Conference,
Mar.
2019.
17.
F. Roos,
P. Hügler,
J. Bechter,
M. A. Razzaq,
C. Knill,
N. Appenrodt,
J. Dickmann and
C. Waldschmidt,
"Effort Considerations of Compressed Sensing for Automotive Radar"
in Radio and Wireless Symposium (RWS),
Jan.
2019.
| File: | https://mwt-www.e-technik.uni-ulm.de/world/data/downloads/papers/2019/2019_RWW_Roos_Effort_Considerations_of_Compressed_Sensing_for_Automotive_Radar.pdf |
16.
B. Schweizer,
D. Schindler,
C. Knill and
C. Waldschmidt,
"A Doppler-Tolerant Stepped-Carrier OFDM-Radar Scheme Based on All-Cell-Doppler-Correction"
in 2019 20th International Radar Symposium (IRS),
2019,
pp. 1-9.
| DOI: | 10.23919/IRS.2019.8768193 |
15.
D. Schindler,
B. Schweizer,
C. Knill,
J. Hasch and
C. Waldschmidt,
"An Integrated Stepped-Carrier OFDM MIMO Radar Utilizing a Novel Fast Frequency Step Generator for Automotive Applications",
IEEE Transactions on Microwave Theory and Techniques,
vol. 67,
no. 11,
pp. 4559-4569,
2019.
| DOI: | 10.1109/TMTT.2019.2916822 |
14.
S. Stephany,
B. Schweizer,
C. Knill and
C. Waldschmidt,
"Impact of an Automotive Chirp-Sequence Interferer on a Wideband Pseudo-Noise Radar"
in 2019 International Conference on Electromagnetics in Advanced Applications (ICEAA),
2019,
pp. 0859-0862.
| DOI: | 10.1109/ICEAA.2019.8879023 |
2018
13.
C. Knill,
B. Schweizer,
P. Hügler and
C. Waldschmidt,
"Impact of an Automotive Chirp-Sequence Interferer on a Wideband OFDM Radar",
2018 15th European Radar Conference (EuRAD),
pp. 34--37,
Sep.
2018.
12.
C. Knill,
B. Schweizer,
S. Sparrer,
F. Roos,
R. F. H. Fischer and
C. Waldschmidt,
"High Range and Doppler Resolution by Application of Compressed Sensing Using Low Baseband Bandwidth OFDM Radar",
IEEE Transactions on Microwave Theory and Techniques,
vol. 66,
no. 7,
pp. 3535-3546,
Jul.
2018.
| DOI: | 10.1109/TMTT.2018.2830389 |
| File: | https://mwt-www.e-technik.uni-ulm.de/world/data/downloads/papers/2018/2018_MTT_Knill_High_Range_and_Doppler_Resolution_by_Compressed_Sensing_Using_OFDM_Radar.pdf |
11.
F. Roos,
P. Hügler,
C. Knill,
N. Appenrodt,
J. Dickmann and
C. Waldschmidt,
"Data Rate Reduction for Chirp-Sequence based Automotive Radars using Compressed Sensing"
in German Microwave Conference (GeMiC),
Mar.
2018.
| File: | https://mwt-www.e-technik.uni-ulm.de/world/data/downloads/papers/2018/2018_GeMiC_Roos_Data_Reduction_Chirp_Sequence_based_Automotive_Radars_Compressed_Sensing.pdf |
10.
B. Schweizer,
D. Schindler,
C. Knill,
J. Hasch and
C. Waldschmidt,
"Expanding the Unambiguous Velocity Limitation of the Stepped-Carrier OFDM Radar Scheme"
in 2018 15th European Radar Conference (EuRAD),
2018,
pp. 22-25.
| DOI: | 10.23919/EuRAD.2018.8546621 |
| File: | https://mwt-www.e-technik.uni-ulm.de/world/data/downloads/papers/2018/2018_EURAD_Schweizer_Expanding_the_Unambiguous_Velocity_Limitation_of_the_Stepped-Carrier |
9.
D. Schindler,
B. Schweizer,
C. Knill,
J. Hasch and
C. Waldschmidt,
"MIMO-OFDM Radar Using a Linear Frequency Modulated Carrier to Reduce Sampling Requirements",
IEEE Transactions on Microwave Theory and Techniques,
vol. 66,
no. 7,
pp. 3511-3520,
2018.
| DOI: | 10.1109/TMTT.2018.2814592 |
8.
B. Schweizer,
D. Schindler,
C. Knill,
J. Hasch and
C. Waldschmidt,
"On Hardware Implementations of Stepped-Carrier OFDM Radars"
in 2018 IEEE/MTT-S International Microwave Symposium - IMS,
2018,
pp. 891-894.
| DOI: | 10.1109/MWSYM.2018.8439179 |
| File: | https://mwt-www.e-technik.uni-ulm.de/world/data/downloads/papers/2018/2018_IMS_Schweizer_On_Hardware_Implementations_of_Stepped-Carrier_OFDM_Radars.pdf |
7.
H. Iqbal,
C. Knill,
M. Z. Khan,
T. Chaloun and
C. Waldschmidt,
"Polarimetric SAR for Automotive Applications"
in 2018 15th European Radar Conference (EuRAD),
2018,
pp. 30-33.
| DOI: | 10.23919/EuRAD.2018.8546578 |
6.
B. Schweizer,
C. Knill,
D. Schindler and
C. Waldschmidt,
"Stepped-Carrier OFDM-Radar Processing Scheme to Retrieve High-Resolution Range-Velocity Profile at Low Sampling Rate",
IEEE Transactions on Microwave Theory and Techniques,
vol. 66,
no. 3,
pp. 1610-1618,
2018.
2017
5.
C. Knill,
J. Bechter and
C. Waldschmidt,
"Interference of Chirp Sequence Radars by OFDM Radars at 77 GHz"
in 2017 IEEE MTT-S International Conference on Microwaves for Intelligent Mobility (ICMIM),
2017,
pp. 147-150.
| DOI: | 10.1109/ICMIM.2017.7918878 |
| File: | https://mwt-www.e-technik.uni-ulm.de/world/data/downloads/papers/2017/2017_ICMIM_Knill_OFDM-Chirp-Interference.pdf |
2016
4.
C. Knill,
A. Scheel and
K. Dietmayer,
"A Direct Scattering Model for Tracking Vehicles with High-Resolution Radars"
in Proceedings of the 2016 IEEE Intelligent Vehicles Symposium,
2016,
pp. 298-303.
3.
C. Knill,
A. Scheel and
K. Dietmayer,
"A direct scattering model for tracking vehicles with high-resolution radars"
in 2016 IEEE Intelligent Vehicles Symposium (IV),
2016,
pp. 298-303.
| DOI: | 10.1109/IVS.2016.7535401 |
| File: | https://mwt-www.e-technik.uni-ulm.de/world/data/downloads/papers/2016/2016_IV_Knill_A_Direct_Scattering_Model_for_Tracking_Vehicles_with_High_Resolution_Radars.pdf |
2.
A. Scheel,
C. Knill,
S. Reuter and
K. Dietmayer,
"Multi-Sensor Multi-Object Tracking of Vehicles Using High-Resolution Radars"
in Proceedings of the 2016 IEEE Intelligent Vehicles Symposium,
2016,
pp. 558-565.
1.
A. Scheel,
C. Knill,
S. Reuter and
K. Dietmayer,
"Multi-Sensor Multi-Object Tracking of Vehicles using High-Resolution Radars"
in 2016 IEEE Intelligent Vehicles Symposium (IV),
2016,
pp. 558-565.
| DOI: | 10.1109/IVS.2016.7535442 |
| File: | https://mwt-www.e-technik.uni-ulm.de/world/data/downloads/papers/2016/2016_IV_Knill_Multi_Sensor_Multi_Object_Tracking_of_Vehicles_Using_High_Resolution_Radars.pdf |