Patent ID: 8169361

Claim:
An electronically scanned radar system comprising: a transmitting antenna for freely emitting a transmission signal consisting of a continuous wave; a receiving antenna consisting of antenna elements corresponding to respective channels; a mixer for obtaining a beat signal by mixing a reception signal received by each of the antenna elements with the transmission signal; an AD converter for obtaining a reception data consisting of an N number of sampled data by sampling the beat signal obtained by the mixer at a predetermined sampling frequency; and a target detection section for detecting a distance from a target or/and a relative speed of the a target, on the basis of the reception data sampled by the AD converter, characterized by: a data cutting out part for cutting out an (N−M+1) number of data each consisting of an M (<N) number of sampled data continuous in the time direction, from the reception data consisting of the N number of sampled data; a frequency spectrum calculation part for calculating a frequency spectrum of each of the (N−M+1) number of data; an interference frequency detection part for detecting an interference component frequency of an interference wave from the frequency spectrum; an interference component removal part for removing the interference component frequency from the beat signal, the interference component frequency being detected by the interference frequency detection part; a buffer part for merging the data cut out by the data cutting out part and removed with the frequency components to restore a data having a length before being cut out; and detection of a distance from the target or/and a relative speed of the target on the basis of the data restored by the buffer part.