RADAR SYSTEM

摘要

A stationary object decision processing unit 14 decides whether range R and Doppler frequency fd corresponding to peaks detected by the peak detection processing unit 13 satisfy geometric positional relationships between a radar and a stationary object. If they satisfy the geometric positional relationships, it recognizes that the object associated with the peaks is a stationary object. Thus, even if the number of peaks detected by the peak detection processing unit 13 increases, it can accurately decide whether the object associated with the peaks is a stationary object or not with a small amount of calculation.

主权项

1. A radar system comprising:
a pulse signal generator that produces a pulse signal; a transmitter-receiver that emits the pulse signal produced by the pulse signal generator into a space, and receives a scattered wave of the pulse signal reflected from a target and returned; a range Doppler map generator that carries out pulse compression of the received signal of the transmitter-receiver using the pulse signal produced by the pulse signal generator, and creates a range Doppler map showing correspondence between range and Doppler frequency by integrating the received signal after the pulse compression for each pulse hit; a peak detector that detects a peak with signal power not less than a threshold in the range Doppler map created by the range Doppler map generator; and a stationary object deciding unit that recognizes, if the Doppler frequency corresponding to the peaks detected by the peak detector equals Doppler frequency computed from distance corresponding to the peaks, from a lateral distance from a vehicle to a stationary object, and from velocity of the vehicle, that the object associated with the peaks is a stationary object.