Patent ID: 6633603
Filing Date: 2003-10-14
Classification: H04B,H04L

Abstract:
A user equipment for use in a code division multiple access (CDMA) communication system including at a plurality of user equipment, the each of said plurality of user equipment comprising a receiver for receiving a communication signal, wherein said communication signal is correlated by said receiver using a delay locked code tracking loop for estimating and tracking a channel delay of said communication, the tracking loop comprising:a reference code generator for generating a reference code signal; an interpolator for generating a base version of the received communication signal and a plurality of time offset versions thereof; a timed signal correlator for correlating each said time offset signal version with said code reference signal and combining the correlations for generating an error signal; an automatic power normalization loop (APN), for generating a power error signal based on the base signal version and the reference code signal; and a normalization circuit for normalizing said error signal using said power error signal to generate a normalized error signal used for controlling the generation of the base signal version by the interpolator.