Effects and mitigation of interference tones on coherent FMCW short-range radars

Reconfigurable RF circuits are expected to become essential microwave components of next-generation wireless-communications and radar systems. In this paper, the usefulness of a tunable notch filter for interference mitigation is evaluated. In particular, the effects of an unintentional interference tone on the imaging performance of a coherent frequency-modulated-continuous-wave (FMCW) radar are assessed through simulation. The reported study serves to theoretically justify the operational benefits from the integration of reconfigurable notch filters into modern RF front-ends of coherent FMCW short-range radars. A specific experimental setup is also suggested for the practical verification of this analysis in a laboratory environment.

[1]  M. Skolnik,et al.  Introduction to Radar Systems , 2021, Advances in Adaptive Radar Detection and Range Estimation.

[2]  William J. Chappell,et al.  Putting the Radio in “Software-Defined Radio”: Hardware Developments for Adaptable RF Systems , 2014, Proceedings of the IEEE.

[3]  Dimitrios Peroulis,et al.  Signal-interference bandpass filters with dynamic in-band interference suppression , 2016, 2016 IEEE Radio and Wireless Symposium (RWS).

[4]  Roberto Gomez-Garcia,et al.  Reconfigurable Multi-Band Microwave Filters , 2015, IEEE Transactions on Microwave Theory and Techniques.

[5]  José M. Muñoz-Ferreras,et al.  Subinteger Range-Bin Alignment Method for ISAR Imaging of Noncooperative Targets , 2010, EURASIP J. Adv. Signal Process..

[6]  Shengli Zhou,et al.  Iterative Sparse Channel Estimation and Decoding for Underwater MIMO-OFDM , 2009, OCEANS 2009.

[7]  Gabriel M. Rebeiz,et al.  Tunable 4-Pole Dual-Notch Filters for Cognitive Radios and Carrier Aggregation Systems , 2015, IEEE Transactions on Microwave Theory and Techniques.

[8]  Changzhan Gu,et al.  Application of Linear-Frequency-Modulated Continuous-Wave (LFMCW) Radars for Tracking of Vital Signs , 2014, IEEE Transactions on Microwave Theory and Techniques.