Patent ID: 9194940
Filing Date: 2015-11-24
Classification: G01S

Abstract:
1. A signal processing apparatus configured to calculate an angle of a detection point corresponding to an object on the basis of received signals of a plurality of array antennas, the signal processing apparatus comprising: a generating unit configured to generate a beat signal by a difference between a transmitted signal having a frequency that is changed in a predetermined period and a received signal obtained by receiving reflected waves of transmitted waves on the basis of the transmitted signal at the detection point; a deriving unit configured to derive digital data through AD conversion of the beat signal; a dividing unit configured to divide the digital data, in a portion of the predetermined period in which the frequency changes, into a plurality of data groups; an acquiring unit configured to perform a fast Fourier transform on the data groups to acquire a plurality of transformed data corresponding to the number of the data groups; a first calculating unit configured to divide the transformed data into a plurality of sets, acquires correlation matrices for the respective sets, and calculate an average value of the correlation matrices; and a second calculating unit configured to calculate the angle of the detection point on the basis of the average value of the correlation matrices.