Analytical investigation of mutual interference between automotive FMCW radar sensors

Radar sensors are key components of modern driver assistance systems. Mutual interference was identified as a problem of increased importance because of the appearance of safety functions and the increasing rate of vehicles equipped with radar sensors. This paper describes mutual interference between automotive FMCW radar sensors. Analytical formulas were derived to be able to calculate the probability for ghost targets and the interference power per frequency bin. The results of the analytical calculations are compared with simulation results on the basis of a simple interference scenario with interference from an oncoming vehicle.