V-BLAST系统中基于子空间跟踪的自适应连续干扰消除接收机设计  

Adaptive Successive Interference Cancellation Detector Based on Subspace Tracking for V-BLAST Systems

作　　者：王会琦[1] 吕王勇[2] 马洪[1] 周永道[1] 

机构地区：[1]四川大学数学学院,四川成都610064 [2]四川师范大学数学与软件科学学院,四川成都610066

出　　处：《四川大学学报（工程科学版）》2010年第4期148-153,共6页Journal of Sichuan University (Engineering Science Edition)

基　　金：国家自然科学基金资助项目(10571127);国家自然科学基金重点资助项目(10731050)

摘　　要：V-BLAST系统中,当存在信道估计误差时,基于最小均方误差(MMSE)的传统连续干扰消除(SIC)检测器检测性能较差,同时运算量也相对较高。针对这些缺陷,通过利用子空间跟踪算法和Hermitian矩阵扰动理论,提出一种新的自适应混合SIC检测算法及其对应的最优检测顺序。最后的模拟结果显示这种算法不仅提高了检测性能,同时对信道估计误差也有一定的免疫性。In V-BLAST systems,when channel estimation errors exist,the performance of conventional successive interference cancellation （ SIC） detector based on minimum mean square error （ MMSE） degrades obviously,meanwhile,computational complexity of these algorithms is still high. In order to overcome these problems,a novel adaptive hybrid SIC detector and the correspondingly optimal detection order were proposed based on the subspace tracking algorithm and Hermitian matrix perturbation theorem. The simulation results showed that the proposed algorithm is effective and has perfect immunity to the accuracy of channel estimation errors.

关 键 词：信号检测 多输入多输出 连续干扰消除 信道估计 子空间跟踪 

分 类 号：TN929[电子电信—通信与信息系统]