Patent ID: 8164511
Filing Date: 2012-04-24
Classification: G01S

Abstract:
1. A signal processing device, of a radar transceiver which receives reflected signals of transmitted signals subjected to frequency modulation such that the frequency rises and falls and which generates beat signals having frequencies corresponding to the frequency differences between the transmission signals and reception signals, comprising: a distance/velocity detection unit, in each detection cycle comprising a plurality of transmission intervals with different frequency change rates of the transmission signals, which detects a relative distance or relative velocity of a target object based on beat signals generated in any of the transmission intervals, and which detects the relative distance or relative velocity of the target object based on a combination of the beat signals generated in the different transmission intervals; and a distance/velocity confirmation unit, which detects detectable ranges of the relative distance or relative velocity for each of a plurality of detection processing types, which sets an evaluation value for a plurality of the detectable ranges, which adds the evaluation value of superposed detectable ranges to compute a total sum, and which confirms the relative distance or relative velocity based on the evaluation value which have reached a criterion value.