一种用于CDMA系统的信道估计与检测方案  

Robust Joint Channel Estimation Multiuser Detection with Differential Modulation in DS/CD- MA Systems

作　　者：刘文珂[1] 马晨欣[1] 程保炜[1] 金梁[1] 

机构地区：[1]郑州解放军信息工程大学信息工程学院6系,450002

出　　处：《微计算机信息》2006年第03X期198-199,248,共3页Control & Automation

基　　金：河南杰出人才创新基金项目:0421000100

摘　　要：在DS/CDMA系统中,多用户检测技术可以减小多址干扰和远近效应,但一般情况下,多用户检测总是假设接收机对信道特性已知。本文提出一种慢衰落信道中的有效的联合信道估计和干扰抵消方法,这种方法需要很少的导频符号来进行信道估计,而且实现简单,可以用在较快衰落信道中。Multiuser detection （MUD） is a powerful technique for mitigating the effects of multiple access interference（MAI） and nearfar problems in DS/CDMA systems. In this paper, an effective joint channel estimation and data detection method with differential modulation and interference cancellation over slow varying fading channels is presented. With this method, near one-user performance with few pilots can be achieved. Furthermore, the receiver is near-far resistant and complexity of the scheme is quite small and can be reliably used in relatively fast fading channels.

关 键 词：多用户检测 衰落信道 联合信道估计 

分 类 号：TP256[自动化与计算机技术—检测技术与自动化装置]