Apparatus and method for generating pseudo-replica signals in a CDMA communication system

摘要

A noise reduction circuit for improving a signal-to-noise ratio of an input signal corresponding to a predetermined sequence of chips, each of the chips having a value corresponding to Logic 0 or Logic 1. The noise reduction circuit comprises a sampling circuit for generating a first sequence of samples of the input signal; a controller for identifying samples in the first sequence of samples corresponding to Logic 0 chips and Logic 1 chips; and a randomizing circuit. The randomizing circuit generates a second sequence of samples by at least one of: i) shifting-positions within the first sequence of samples of some of the identified Logic 0 samples; and ii) shifting positions within the first sequence of samples of some of the identified Logic 1 samples corresponding to Logic 1 chips. The first and second sequences of samples may then be combined to generate an improved composite signal.