非理想信道估计下的软输出MMSEV-BLAST检测算法  

Soft-Output MMSE V-BLAST Detector Under Imperfect Channel Estimation

作　　者：王军[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》2009年第5期1225-1228,共4页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60702073);国家863计划项目(2007AA01Z209);国家基础科研项目(A1420080150);国家973计划项目(2009CB320405)资助课题

摘　　要：针对信道编码MIMO系统,该文推导出了实际信道估计下的软输出MMSEV-BLAST检测算法,该算法同时考虑了信道估计误差和判决误差传播的影响。仿真结果显示该文所提算法在几乎没有增加复杂度的情况下,可以极大地降低残余误码平层,获得显著的性能增益;所提算法对信道估计误差方差的估计可靠性不敏感,因而具有实际应用价值。With respect to channel coded Multiple-Input Multiple-Output （MIMO） systems, a novel soft-output MMSE V-BLAST detector is derived by considering both the channel estimation error and decision error propagation. Compared with the conventional detection algorithm, simulation results show that proposed scheme can decrease the error floor drastically and obtain significant performance gain at the cost of negligible increased complexity. Furthermore, as proposed scheme is not sensitive to the error of the variance of the estimated channel estimation error, it is desirable for practical applications.

关 键 词：MIMO MMSE V-BLAST 软输出 信道估计误差 

分 类 号：TN92[电子电信—通信与信息系统]