SIGNAL PROCESSING DEVICE AND METHOD, PROGRAM, STORAGE MEDIUM, AND ULTRASONIC DIAGNOSTIC APPARATUS

摘要

PROBLEM TO BE SOLVED: To improve fidelity and a S/N ratio by removing a phase noise in a reflected signal. SOLUTION: Both of a Q signal and an I signal are input in a phase calculation part 610 in a noise reducing filter 600. The phase calculation part 610 is connected with a phase filter part 630, and the phase filter part 630 computes the moving average (Φaverage) of the phaseΦ. This method can directly filter the phaseΦto effectively remove the phase noise. COPYRIGHT: (C)2006,JPO&NCIPI