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Packet-based FMCW Radar using CSMA Technique to Avoid Narrowband Interefrence

Inter-radar interference of densely deployed automotive FMCW radars can cause miss detection and/or false detection of the target, i.e. ghost target detection. As the occurrence probability of narrowband interference is relatively large in fast chirp FMCW radars, this paper proposes a novel concept of packet-based FMCW radar using CSMA (Carrier Sense Multiple Access) technique to mitigate narrowband interference of FMCW radars. This paper defines available frequency resources for the packet based FMCW radars and proposes two CSMA schemes, i.e. single carrier sense based CSMA scheme and double carrier sense based CSMA scheme for packet based FMCW radars. It also evaluates narrowband interference mitigation performance of the proposed packet based FMCW radars using CSMA by computer simulations.