TRACKING DEVICE FOR DIFFUSED SPECTRUM SIGNAL USING ADAPTIVE FILTER, AND MANUFACTURE THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a method and a system for tracking synchronizedly a weak and noise-full CDMA signal flowing inside a GPS receiver. SOLUTION: This tracking device for code- and/or carrier-tracking a broadcasting signal included in a diffused spectrum signal containing a code signal and a carrier signal is provided with a receiver for receiving the diffused spectrum signal, and a filter circuit for processing the received signal to code-track the broadcasting signal. The filter circuit includes at least one adaptive digital filter varied with the lapse of time.