Patent ID: 6798373
Filing Date: 2004-09-28
Classification: G01S

Abstract:
An FM-CW radar system which transmits an FM-CW wave and receives a reflected wave from a target object, comprising:modulating signal generating means capable of changing a modulating signal to be applied to said FM-CW wave; calculating means for calculating a distance or relative velocity with respect to said target object by performing processing for detection of said target object by fast-Fourier transforming a beat signal occurring between a transmitted signal of said FM-CW wave and a received signal of said reflected wave; and control means for determining a detection range based on the distance calculated by said calculating means, and for performing control for said modulating signal to be changed by said modulating signal generating means; wherein when two or more target objects are detected, said control means selects the shortest distance from among the distances of said detected target objects calculated by said calculating means and determines said detection range based on a distance obtained by adding a prescribed distance to said selected distance.