Patent ID: 8179303

Claim:
A signal processing apparatus for a radar transceiver, which receives a reflected signal generated by a target object in response to a frequency modulated transmission signal, and generates a beat signal having a frequency difference between the transmission signal and a reception signal, comprising: an azimuth angle detection unit that detects an azimuth angle of the target object on the basis of a peak signal in a frequency spectrum of the beat signal; a storage unit that stores frequencies of the peak signals in association with, an order of preference, wherein, among the frequencies of the peak signals, multiple frequencies based on which the target objects are determined to have the same relative velocity are associated with such an order of preference that the target object of which a relative distance determined based on the corresponding frequency is greater has a lower order of preference, and multiple frequencies based on which the target objects are determined to have the same relative distance are associated with such an order of preference that the target object of which a relative velocity determined based on the corresponding frequency is greater has a lower order of preference; a peak signal extraction unit that extracts, from among multiple peak signals corresponding to a predetermined azimuth angle range that are associated with the order of preference corresponding to the frequencies of the peak signals, a predetermined number of peak signals having an upper order of preference based on the order of preference, and discards peak signals that are not extracted; and a target object detection unit that detects, based on a pair of the peak signals corresponding to the same target object among the extracted peak signals, the relative distance and relative velocity of the target object.