SIGNAL-PROCESSING STUDY FOR AN FM CW COLLISION-AVOIDANCE RADAR SYSTEM

This paper describes an anti-collision system using frequency modulati on (FM) and operating in continuous wave (CW) mode. The goal of the an ti-collision system is to keep a car at a safe distance from any obsta cle in front of it. For this purpose, the spectrum analysis of the rad ar signal is achieved using Fast Fourier Transform (FFT) with windowin g and the Bartlett estimate, in order to measure the range to the targ et (obstacle) and its relative speed. The experiments were carried out with a 10.5 GHz microwave radar sensor and it has been demonstrated t hat it is not necessary to average different periodograms. Results con cerning the position of the target and its relative speed are given an d discussed for a single target (obstacle) and the simultaneous detect ion of several targets. (C) 1997 Elsevier Science B.V.