基于恒模算法的天线阵多载波码分多址系统空频盲多用户检测  

Blind Multiuser Detection for Antenna Array MC-CDMA Systems based on CMA

作　　者：赵发勇[1] 酆广增[1] 

机构地区：[1]南京邮电大学通信与信息工程学院

出　　处：《信号处理》2008年第5期824-827,共4页Journal of Signal Processing

基　　金：国家自然科学基金(60472104)

摘　　要：多载波码分多址(MC-CDMA)可以对抗频率选择性,天线阵可以提高系统的性能。本文首先提出一种基于恒模算法的天线阵MC-CDMA系统空频盲自适应多用户检测,该算法具有MN维权向量,结构相对复杂;进而提出一种空频联合约束恒模算法的盲自适应多用户检测,可以保证算法具有鲁棒性,收敛于期望用户,该算法具有M+N权向量,结构简单。仿真表明,本文提出的算法比传统的基于波束成形的两步算法具有更好的误码率性能。MC-CDMA has the ability to combat with frequency selective fading and antenna array can enhance the performance of the system. The paper first proposes a spatial frequency blind adaptive multiuser detection for antenna array MC-CDMA based on constant modulation algorithm with MN -dimension weight vector, which has a relative complex weight structures, Then we propose a blind adaptive multiuser detection based on joint spatial frequency constraint constant modulation algorithm with M ＋ N -dimension weight vector, which has robust performance and can ensure the weight vectors converge to that of the desired user. Simulation indicates that the proposed algorithms have better BER （Bit error ratio）performance than that of the traditional beamforming-based two-step algorithms.

关 键 词：天线阵 多载波码分多址 恒模算法 空频盲多用户检测 

分 类 号：TN929.533[电子电信—通信与信息系统] TN929.5[电子电信—信息与通信工程]