基于迫整检测的全分集多用户空时分组编码设计准则  

Full-diversity design criterion for multi-user STBC based on integer-forcing detection

作　　者：李国权[1,2] 周湘云 林金朝[1,2] 徐勇军[1] 庞宇[2] 王家城 LI Guoquan;ZHOU Xiangyun;LIN Jinzhao;XU Yongjun;PANG Yu;WANG Jiacheng(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Chongqing Key Laboratory of Photoelectronic Information Sensing and Transmitting Technology,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]重庆邮电大学光电信息感测与传输技术重庆市重点实验室,重庆400065

出　　处：《通信学报》2019年第3期139-146,共8页Journal on Communications

基　　金：国家自然科学基金资助项目(No.61301124;No.61671091)~~

摘　　要：多用户空时分组编码系统存在译码复杂度高的问题。为了降低系统译码复杂度并保证较好的系统性能,将低复杂度的迫整检测算法用于多用户空时分组编码中,并基于等效噪声功率最小化原则获取了迫整检测的差错概率上界。为了解决迫整检测的多用户空时分组编码设计问题,提出了基于迫整检测的全分集多用户空时分组编码设计准则,证明只要每个用户的空时分组编码方案均满足非零奇异值特性,则多用户空时分组编码可获得满分集增益,且其编码增益与最小奇异值有关。仿真结果表明,满足设计准则的空时分组编码方案能够获得满分集增益。Multi-user space time block code systems have the problem of high decoding complexity.To ensure good system performance with low decoding complexity at the same time,low complexity integer-forcing(IF)detection algorithm was applied to multi-user space time block code.Then the upper bound of error probability for IF detection was derived by minimizing the equivalent noise power.To obtain good multi-user space time block code when decoded with IF detection,a full-diversity design criterion was proposed.It was proved that full diversity could be achieved if every user’s space time block code had property of non-vanishing singular value.Simulation result shows that the code gain is found related to the minimum singular value.

关 键 词：MIMO系统 迫整检测 多用户空时分组编码 设计准则 全分集 

分 类 号：TP302[自动化与计算机技术—计算机系统结构]