空间相关MIMO信道下的OSTBC有限反馈预编码  

Limited Feedback Precoding Based on Orthogonal Space-time Block Codes for Spatially Correlated MIMO Channels

作　　者：李国强[1] 刘顺兰[1] 

机构地区：[1]杭州电子科技大学通信工程学院,浙江杭州310018

出　　处：《杭州电子科技大学学报（自然科学版）》2015年第2期60-64,共5页Journal of Hangzhou Dianzi University：Natural Sciences

摘　　要：对于独立同分布瑞利衰落信道,酉预编码OSTBC有限反馈系统能保持良好的性能。但当MIMO信道具有空间相关性时,衰落相关性降低了信道的系统性能。针对这一问题,在已有的酉预编码码本基础上,设计了一种旋转码本。仿真结果表明,在空间相关MIMO信道下,新码本的误码率性能有了一定的改善。而且在快速选码方案中,选码复杂度有了很大的降低。For independent and identically-distributed Rayleigh fading channel , limited feedback unitary precoding orthogonal space-time block coding （ OSTBC ） system has been proved to have satisfactory performance .However the fading correlation degrades system performance when the spatial correlation of multiple-input multiple-output （ MIMO ） channels exists . To solve this problem , a rotated codebook was designed based on the existed unitary precoding codebook .Simulation results show that the symbol error ratio （SER） performance of the new codebook has some improvement when in correlated MIMO channels .Besides, in the fast encoding scheme , the encoding complexity has been greatly reduced .

关 键 词：有限反馈 空间相关 旋转 正交空时分组码 

分 类 号：TN911.22[电子电信—通信与信息系统]