MIMO干扰信道中改进的干扰消除方法  

Improved Interference Cancellation Method for MIMO Interference Channel

作　　者：田心记[1] 李晓静[1] 

机构地区：[1]河南理工大学计算机科学与技术学院,河南焦作454000

出　　处：《计算机工程》2016年第10期135-139,共5页Computer Engineering

基　　金：河南省高等学校矿山信息化实验室开放基金资助项目(KY2015-01);河南省高校基本科研业务费专项基金资助项目(NSFR F140126);河南理工大学博士基金资助项目(B2012-063)

摘　　要：对于含3个用户且每个用户配置4根天线的MIMO干扰信道,提出一种新的干扰消除方法。为每个用户设计4×4的空时码字,该码字具有Alamouti码字的结构。采用单向协作链路,消除第1个接收端的多用户干扰。通过干扰对齐预编码,使得第2个接收端和第3个接收端收到的干扰码字对齐,并利用Alamouti码字对应的等效信道矩阵的正交特性,消除这2个接收端的多用户干扰。实验结果表明,该方法的分集增益为8,高于相同场景中的干扰消除方法,并且具有较高的系统容量和可靠性。An improved interference cancellation method is proposed for MIMO interference channel with three users each of which equipped with four antennas. 4 ×4 space-time codeword with Alamouti code structure is designed. The multi-user interference at the first receiver is cancellated by the unidirectional operational link. Then, the interfering codeword are aligned at the second and the third receivers through interference alignment pre-coding. Multi-user interference at these two receivers is cancellated by the orthogonal properity of the effective channel matrices for Alamouti code. Experimental result shows that the diversity gain of the proposed method is 8, higher than that of the existing interferenc acncellation method for the same scene. And it has higher system caDacitv and reliability.

关 键 词：干扰信道 空时码字 多用户干扰 干扰对齐 预编码 分集增益 

分 类 号：TN929.5[电子电信—通信与信息系统]