Patent ID: 8816902
Filing Date: 2014-08-26
Classification: G01S

Abstract:
1. A radar apparatus configured to detect a target, the radar apparatus comprising: a plurality of antennas; a detection signal generating unit configured to generate detection signals of the target on the basis of transmission and reception waves of the antennas; and a detection signal processing unit configured to perform frequency analysis on the detection signals of the target, which are generated by the detection signal generating unit to extract signal components of the target, and to perform a predetermined process on the signal components to calculate at least one of a distance to the target, a relative speed to the target, and an orientation of the target, wherein the detection signal generating unit includes a filter unit configured to give changes to the detection signals corresponding to the antennas, respectively, in a frequency bandwidth higher than Nyquist frequency which is a half a sampling frequency, and wherein the detection signal processing unit is configured to acquire the signal components from the detection signals corresponding to the antennas, respectively, to which the filter unit gives the changes to determine whether the signal components are generated by replication due to the Nyquist frequency.