多用户检测技术的发展与应用  

The development and application of multi-user detection

作　　者：居美艳[1] 

机构地区：[1]南京邮电学院通信工程系,江苏南京210003

出　　处：《电力系统通信》2004年第12期33-36,共4页Telecommunications for Electric Power System

摘　　要：CDMA系统是一个自干扰系统,多址干扰是限制其容量和性能的主要原因之一,传统的相干接收机不能从根本上解决消除多址干扰的问题,因此如何抑制多址干扰引起了通信界学者们的关注,多用户检测技术能从根本上消除多址干扰,提高系统的性能。文中主要介绍了多用户检测的思想和检测器的分类,以及衡量多用户检测器性能的三个重要指标,还阐述了多用户检测技术的新发展和该技术在几个具体系统中的应用。CDMA system is a self-disturbing system,and multiple access interference(MAI) is one of the main reasons to limit its capacity and performance. Traditional coherent receivers can′t eliminate MAI from essentials,so the problem how to suppress MAI has attracted attention of scholars in communication field.Multi-user detection(MUD) can substantially eliminate MAI and improve the system performance.This paper mainly introduces the idea and classification and three important indexes of measuring performances of MUD. The new development of MUD and the specific applications of MUD in some systems are also presented in the paper.

关 键 词：多用户检测 多址干扰 码分多址 解相关检测器 MMSE检测器 多载波-码分多址 AD-HOC网络 

分 类 号：TN92[电子电信—通信与信息系统] TN914.53[电子电信—信息与通信工程]