CIRCUITRY AND METHOD FOR DEMODULATING CODE DIVISION MULTIPLE ACCESS (CDMA) SIGNALS

摘要

A method and apparatus is provided for demodulating direct sequence, spread spectrum CDMA signals in the presence of unknown spread-spectrum multiuser interference and additive white Gaussian noise, using only the available received signal and the predetermined, pre-stored spreading code assigned to user of interest. The method includes the steps of sampling the incoming channel signal at the chip rate to produce an incoming sampled signal, supplying the incoming sampled signal to filter having tap coefficients corresponding to an auxiliary vector, the filter having an output representing an estimate of the transmitted symbol, providing the output to a sign determining components and determining the sign of the output to thereby generate the detected symbol.