  Commercial automotive radars used today are based on frequency modulated
continuous wave signals due to the simple and robust detection method and good
accuracy. However, the increase in both the number of radars deployed per
vehicle and the number of such vehicles leads to mutual interference among
automotive radars, and cutting short future plans for autonomous driving and
safety. We propose and analyze a radar communication (RadCom) approach to
reduce or eliminate this mutual interference while simultaneously offering
communication functionality. Our RadCom approach frequency division multiplexes
radar and communication, where communication is built on a decentralized
carrier sense multiple access protocol and is used to adjust the timing of
radar transmissions. Our simulation results indicate that radar interference
can be significantly reduced, at no cost in radar accuracy.
