空时相关MIMO信道下的空时联合Huffman有限反馈预编码  

Joint space-time Huffman limited feedback precoding for spatially and temporally correlated MIMO channels

作　　者：居美艳[1] 葛欣[1] 李岳衡[1] 谭国平 

机构地区：[1]河海大学计算机与信息学院,江苏南京211100

出　　处：《通信学报》2013年第11期179-183,共5页Journal on Communications

基　　金：国家自然科学基金资助项目(61001068)~~

摘　　要：针对空时相关的MIMO信道,提出了一种新颖的Huffman空时联合有限反馈预编码方法,提高了系统性能,并减少了反馈量。从信道的空间相关性出发,推导了迫零准则下预编码的构成,从而设计了一种旋转量化码本,减小了空间相关性对系统性能的影响。另外,针对信道的时间相关性,利用基于邻域的有限反馈来降低慢衰落信道的反馈量。同时,由于领域内各码字被选中的概率不同,可以利用Huffman编码进一步减少反馈量。For the MIMO channels with space correlation and time correlation, a novel joint space-time Huffman limited feedback precoding scheme was proposed which improves the system performance and reduces the amount of feedback. Based on space correlation, the precoding structure under zero-forcing （ZF） criterion was derived and the rotating quan- tization codebook was designed which reduces the effect.of space correlation on system performance. In addition, in view of time correlation of channels, the scheme reduces the feedback data of channel state information （CSI） in the slow fad- ing channel by using neighborhood-based limited feedback. Due to different probabilities of codewords in the neighbor- hood, Huffman coding was adopted to further reduce the amount of feedback.

关 键 词：量化码本 空时相关 邻域 HUFFMAN编码 

分 类 号：TN911.22[电子电信—通信与信息系统]