CFAR-Based Interference Mitigation for FMCW Automotive Radar Systems

CFAR-Based Interference Mitigation for FMCW Automotive Radar Systems

Wang, J. (TU Delft Microwave Sensing, Signals & Systems)

2022

In this paper, constant false alarm rate (CFAR) detector-based approaches are proposed for interference mitigation of Frequency modulated continuous wave (FMCW) radars. The proposed methods exploit the fact that after dechirping and low-pass filtering operations the targets' beat signals of FMCW radars are composed of exponential sinusoidal components while interferences exhibit short chirp waves within a sweep. The spectra of interferences in the time-frequency (t-f) domain are detected by employing a 1-D CFAR detector along each frequency bin and then the detected map is dilated as a mask for interference suppression. The proposed approaches are applicable to the scenarios in the presence of multiple interferences. Compared to the existing methods, the proposed methods reduce the power loss of useful signals and are very computationally efficient. Their interference mitigation performances are demonstrated through both numerical simulations and experimental results.

Beat signal
constant false alarm rate (CFAR) detector
Detectors
FMCW radar
interference mitigation
time-frequency spectrum

http://resolver.tudelft.nl/uuid:3a326c93-ad32-49cd-8ae3-1987d4f1b3b5

https://doi.org/10.1109/TITS.2021.3111514

2023-07-01

1524-9050

IEEE Transactions on Intelligent Transportation Systems, 23 (8), 12229-12238

Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Institutional Repository

journal article

© 2022 J. Wang