空间相关MIMO信道下的有限反馈预编码  

Limited feedback precoding for spatially correlated MIMO channels

作　　者：葛欣[1] 居美艳[1] 

机构地区：[1]河海大学计算机与信息学院,江苏南京211100

出　　处：《电子设计工程》2013年第4期159-161,共3页Electronic Design Engineering

摘　　要：对于独立同分布的瑞利衰落信道,Grassmann码本可以取得良好的系统性能,但是当MIMO信道存在空间相关性时,该码本不可避免的带来性能损失,本文针对空间相关的MIMO信道,通过用发送相关矩阵的平方根对传统Grassmann码本进行旋转,然后再量化,得到适用于空间相关信道下的新码本,并通过实验仿真阐释了新得到的码本对于传统码本在误码率和信道容量方面等方面的性能优势。For independent and identically-distributed Rayleigh fading channel, Grassmann precoding codebook is proved to have good system performance. However this codebook inevitablely bring performance loss when spatial correlation of MIMO channel exists. In view of the MIMO channel with space correlation, this paper designs an approach to suit the spatially correlated channels by rotating and quantifying the traditional Grassmann codebook .The superiority of the new codebook in terms of both the channel capacity and BER is further confirmed by experimental simulations.

关 键 词：Grassmann码本 旋转量化 空间相关 有限反馈 

分 类 号：TN911.22[电子电信—通信与信息系统]