Patent ID: 9354303
Filing Date: 2016-05-31
CPC Classification: G01S

Claim Text:
1. A signal processing device, comprising: an echo signal input unit configured to receive echo signals resulted from transmission signals reflected on an object, the transmission signals transmitted from a transmission source at transmission timings at predetermined time intervals, at least one of the transmission timings shifted from the other timings in time; a complex reception signal generator configured to generate complex reception signals based on the echo signals by performing quadrature detection on the echo signals; a phase calculator configured to calculate a phase change amount of the complex reception signals with respect to a reference phase based on a moving speed of the transmission source and a lapsed period of time from a reference timing; a phase corrector configured to correct a phase of the complex reception signals based on the phase change amount and to output the corrected complex reception signals; and a Doppler processor configured to perform Doppler processing on the corrected complex reception signals and to output the Doppler-processed complex reception signals as Doppler echo signals of the object.