Patent ID: 7671788

Claim:
A radar system that emits pulsed transmission radio waves generated based on a frequency-modulated reference continuous waveform, acquires a reception signal by receiving the pulsed transmission radio waves reflected from an external object, and computes distance thereto and velocity thereof from the frequency of a beat signal obtained by mixing the acquired reception signal with the reference continuous waveform, the radar system comprising: a frequency-band selector that classifies, on the basis of a spectral spread corresponding to the pulse width of the pulsed transmission radio waves, frequency components of the beat signal; a distance/velocity detector that computes, on the basis of the classified results from the frequency-band selector, at least one of relative distance to and velocity of a moving object reflecting the pulsed transmission radio waves, and relative distance to a stationary object reflecting the pulsed radio waves; a filter that blocks out a portion of the beat signal frequency components; and a frequency analyzer that frequency-analyzes a portion whose frequency components have been blocked out by the filter so as to output frequency components; and wherein the frequency-band selector classifies, on the basis of spectral spread, the frequency components outputted by the frequency analyzer.