基于迭代信道软信息的编码MIMO检测  

Coded MIMO Detection Based on Iterative Channel Soft Information

作　　者：徐瑨[1,2] 陶小峰[1,2] 张平[1,2] 

机构地区：[1]北京邮电大学电信工程学院,北京100876 [2]泛网无线通信教育部重点实验室(北京邮电大学),北京100876

出　　处：《电子与信息学报》2009年第1期57-60,共4页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60702051);国家863计划项目(2006AA01Z260;2007AA01Z261);教育部新世纪优秀人才支持计划(NCET-05-0116)资助课题

摘　　要：该文针对编码MIMO系统,分析了MIMO检测过程中串行干扰删除引入的误差传播对软解调的影响,同时,借鉴软符号干扰消除的思想,推导出该系统中迭代信道软信息(Iterative Channel Soft Information,ICSI)的计算方法,并证明了该信道软信息等价于信道矩阵广义逆的行范数的倒数。理论分析及仿真表明,该文所述基于ICSI的编码MIMO检测算法可以在不增加任何额外运算量的前提下,显著改善编码MIMO系统的性能。In this paper, the influence of error propagation on soft demodulation in coded MIMO system is analyzed in detail. Besides, based on the thought of soft symbol interference cancellation, Iterative Channel Soft Information （ICSI） for coded MIMO system is further deduced and proved to have the same form as the inverse of row norm of Moore-Penrose inverse of channel matrix. Theoretical analysis and simulation results indicate that the proposed coded MIMO detection algorithm based on ICSI could improve the system performance effectively without additional calculation complexity.

关 键 词：编码MIMO系统 软解调 误差传播 软符号干扰消除 迭代信道软信息 

分 类 号：TN914[电子电信—通信与信息系统]