分布式MIMO系统的一种低复杂度检测算法  

A Low Complexity Detection Scheme for MIMO Signal with Distributed Transmit Antennas

作　　者：赵宏志[1] 唐友喜[1] 李少谦[1] 

机构地区：[1]电子科技大学通信抗干扰技术国家级重点实验室,成都610054

出　　处：《电子与信息学报》2007年第3期661-665,共5页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60272009;60472045;60496313);教育部博士点基金(20020614001)资助课题

摘　　要：针对发射天线分布的MIMO信号,基于排序的乔列斯基分解过程(Sorted CHolesky Decomposition,SCHD),将匹配滤波后的加性高斯色噪声转化成加性高斯白噪声,根据后验信噪比对发射信号检测顺序进行重排,降低了误差传播的影响,该算法仅需一次矩阵求逆操作。在瑞利衰落信道下的计算机仿真表明,该算法与已有的分布式MIMO信号检测方法相比,具有较优的性能和较低的复杂度。A low complexity detection scheme for the MIMO system with distributed transmit antennas is presented. Based on a Sorted CHolesky Decomposition （SCHD）, the additive gaussian color noise after match filter is whitened; The detection sequence according to the post signal noise ratio is reordered, and the risk of error propagation is degraded. The whole algorithm only requires one matrix inverse. Simulation results show that the presented algorithm has better performance and lower complexity compared to the existing detection scheme over Rayleigh fading channels.

关 键 词：分布式MIMO系统 排序 乔列斯基分解 

分 类 号：TN929.5[电子电信—通信与信息系统]