| 摘要 |
PROBLEM TO BE SOLVED: To prevent decline of detection accuracy of an azimuth angle caused by approximation of each peak frequency of a plurality of target objects. SOLUTION: In this signal processing device of a radar transmitter/receiver for receiving a reflected signal of a transmission signal subjected to frequency modulation as a reception signal by an antenna group, and generating a beat signal having a frequency corresponding to a frequency difference between the transmission signal and the reception signal relative to each antenna, azimuth angle candidates of the target object are detected based on a phase difference of beat signals in a common frequency relative to each pair of antennas, and an azimuth angle candidate agreeing in a prescribed error range with a predicted azimuth angle predicted from a variation of a detected azimuth angle detected in the past from among the azimuth angle candidate group is extracted, and since the azimuth angle of the target object is detected based on the predicted azimuth angle and the extracted azimuth angle candidate, even when detection accuracy of the azimuth angle candidate is lowered by approximation of each peak frequency of the plurality of target objects, accuracy decline of the detected azimuth angle can be prevented by using the predicted azimuth angle. COPYRIGHT: (C)2010,JPO&INPIT |
