一种基于协作MIMO的Relay-STBC-HARQ策略及其性能分析  

Performance of a Novel Relay-STBC-HARQ for Cooperative MIMO System

作　　者：陈永辉[1,2] 朱光喜[1] 王德胜[1] 

机构地区：[1]华中科技大学电信系,武汉国家光电实验室(筹),湖北武汉430074 [2]湖北工业大学计算机学院,湖北武汉430068

出　　处：《微电子学与计算机》2009年第7期40-44,共5页Microelectronics & Computer

基　　金：国家自然科学基金项目(60496315;60502023;60802009);国家"八六三"计划项目(2006AA1Z277;2008AA01Z211);湖北省自然基金项目(2007ABA008);国际科技合作计划(2008DFA11630)

摘　　要：在两跳协作通信中,第一跳增益来自接收分集,第二跳主要增益来自协作编码.利用协作中继节点的多天线构成的MIMO系统,构造一种新型的连续STBC编码,VBLAST-STBC混合解码的中继HARQ策略,可以同时有效获得HARQ的时间分集增益以及空时编码的分集增益与复用增益.理论分析与仿真结果表明,Relay-STBC-HARQ策略可以充分挖掘第一跳的分集增益以及第二跳的协作增益,不仅可以获得可靠性覆盖,而且可以在误码率、码率与时延间获得一种弹性平衡.In 2-hop relay communication system, the first hop mainly gets the diversity gain while the second hop gets the cooperative gain. While the HARQ can get the time diversity gain, space-time block coding can get a trade of diversity gain and multiplex gain, it is significant to combine the HARQ and STBC in a cooperative MIMO system that multi-antenna come from cooperative relay nodes. According to analysis the relationship between the VBLAST, HARQ and STBC, a novel Relay-STBC-HARQ was proposed. The algorithm performs well in the performance simulation that can improve the system capacity by spatial multiplex gain and cooperative gain. This means credible coverage and a flexible tradeoff among BER rate, code rate and delay.

关 键 词：协作MIMO relay-STBC-HARQ VBLAST-STBC解码 协作编码 

分 类 号：TN929[电子电信—通信与信息系统]