Patent ID: 8730099
Filing Date: 2014-05-20
Classification: G01S

Abstract:
1. An electronic scanning type radar device mounted on a moving body comprising: a transmission unit transmitting a transmission wave; a reception unit comprising a plurality of antennas receiving an incoming wave, the incoming wave being a reflection wave of the transmission wave from a target; a beat signal generation unit generating a beat signal comprising a frequency of a difference between the transmission wave and the reflection wave; a frequency resolution processing unit frequency resolving the beat signal into a beat frequency of a predetermined resolution number in chronological order and computing a complex number data; a peak detection unit detecting a peak value from an intensity value of each of the beat frequency and detecting an existence of a target; a correlation matrix computation unit computing a correlation matrix from each of a complex number data of a detected beat frequency for which the target was detected for each of the antennas; an eigen value computation unit computing an eigen value from a correlation matrix; a comparison unit comparing an eigen value obtained by normalizing, and a predetermined threshold value; a determination unit determining a number of an eigen value of a numeric value, among an eigen value corresponding to a beat frequency for which a target was detected, the numeric value exceeding the threshold value, as a number of the incoming waves.