Multiuser detection for DS-CDMA systems in non-Gaussian channels  

作　　者：ZHAO Ying ZHENG Jun-li 

机构地区：[1]Department of Electronic Engineering,Tsinghua University,Beijing 100084,China

出　　处：《Frontiers of Electrical and Electronic Engineering in China》2006年第2期160-163,共4页中国电气与电子工程前沿（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.60072001).

摘　　要：An adaptive multi-user detector was developed for direct-sequence code division multiple access(DS-CDMA)systems corrupted by non-Gaussian channel noise,which can be quite detrimental to the performance of the multi-user detectors based on classical white Gaussian assumption.This receiver simultaneously combats multiple-access interference(MAI)and non-Gaussian impulsive noise.The channel parameters are estimated and transmitted signals are jointly detected by a simple recursive algorithm derived from the EM/SAGE algorithm.Analytical and simulation results show that the proposed technique is robust with wider applicability than conventional multi-user detectors in terms of near-far resistance and bit-error ratio(BER)when either MAI or non-Gaussian impulsive noise is dominant.

关 键 词：DS-CDMA Multi-user detection(MUD) Non–Gaussian impulsive noise EM/SAGE algorithm Multiple access interference(MAI) 

分 类 号：TN9[电子电信—信息与通信工程]