A Ghost Target Suppression Technique using Interference Replica for Automotive FMCW Radars

As an automotive FMCW (Frequency Modulated Continuous Wave) radar used for automated driving or ADAS (Advanced Driver Assistance System) will be widely deployed, miss-detection and/or false detection due to inter-radar interference can be a serious problem in near future. In order to mitigate narrowband interference resulting in false detection or so-called ghost target detection, this paper proposes a novel ghost target suppression technique using interference replica for automotive FMCW radars where the narrowband interference replicas is generated by performing carrier sense before initiating radar signal transmission and suppresses the ghost target from the received beat signals by subtracting the generated interference replica from the received signals in the frequency spectrum. Computer simulations confirm the proposed ghost target suppression scheme is feasible.