Patent ID: 6369700
Filing Date: 2002-04-09
Classification: G01S

Abstract:
An on-vehicle DBF radar apparatus mounted on a vehicle and arranged to detect an object in the vicinity of said vehicle by radar beam scanning whereinFM-CW signals are used as transmitted signals, said transmitted signals are mixed with received signals to generate beat signals, which are subsequently converted into digital beat signals, said digital beat signals are subjected to digital signal processing so as to synthesize radar beams, and said synthesis of the radar beams in a plurality of directions carries out the radar beam scanning, and wherein said DBF radar apparatus comprises lane shape acquiring means for acquiring a shape of a lane on which said vehicle is driving, means for limiting the directions in which said radar beams are synthesized according to the shape of the lane acquired by said lane shape acquiring means so as to limit a scanning range of said radar beam scanning, and means for limiting frequency ranges of said digital beat signals used in said synthesis of the radar beams based on the shape of the lane and according to the directions in which the radar beams are to be synthesized.