SYNCHRONOUS TRACKING CIRCUIT

摘要

PROBLEM TO BE SOLVED: To eliminate the component of another path interfering with a target path so as to make correct synchronous tracking in a multi-path environment. SOLUTION: A synchronous tracking circuit makes a reverse diffusion code train of a receiving end track a diffusion code train of a sending end, synchronizing with it in phase and is equipped with a DDL(Delay Locked Loop) circuit 11 which makes synchronous tracking through a DDL control and an interference component estimating part 12 which estimates the components of the other paths interfering with a prescribed target path out of multi paths. The DDL circuit 11 is equipped with an interference eliminating part 11e to carry out DDL control by the signals where the interference components of the other paths are eliminated, and a receiving end reverse diffusion code train is synchronized in phase with a sending end diffusion code train for making synchronous tracking.