MC-CDMA系统迭代检测中的一种基于EM的信道估计算法  

An EM Channel Estimation Algorithm for Iterative Detection of MC-CDMA Systems

作　　者：王鹏[1] 姜华[1] 刘海涛[1] 杨根庆[1] 

机构地区：[1]上海微系统与信息技术研究所,上海200050

出　　处：《电子与信息学报》2005年第11期1691-1694,共4页Journal of Electronics & Information Technology

基　　金：中国科学院创新项目资助课题

摘　　要：该文将多用户检测和译码相结合的迭代检测技术应用于MC-CDMA 系统。多用户检测器由串行干扰消除和其后的MMSE 滤波器组成。信道估计器采用一种基于期望最大(EM)信道估计算法,该算法降低了信道估计的复杂度,仿真表明其具有良好的性能。Iterative multi-user detection with channel decoding is applied to MC-CDMA, the multi-user detector is implemented as successive interference canceller with post-minimum mean squared error filtering. A new channel estimation approach based on expectation maximizatiom algorithm is proposed for the iterative detection. The proposed approach decreases the complexity of computation. Simulation shows that the proposed receiver approach single-user performance at very high channel load.

关 键 词：MC-CDMA 串行干扰消除 软输入软输出译码 EM 信道估计 

分 类 号：TN929.5[电子电信—通信与信息系统]