基于Khatri-Rao积的3D MU-MIMO预编码方法  

3D MU-MIMO Precoding Method Based on Khatri-Rao Product

作　　者：吴学文[1] 景小荣[1,2] 刘利[1] 

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]重庆邮电大学移动通信技术重庆市重点实验室,重庆400065

出　　处：《电讯技术》2014年第11期1510-1515,共6页Telecommunication Engineering

基　　金：国家科技重大专项(2013ZX03003008-005)~~

摘　　要：为了解决下行三维(3D)多用户(Multi-User,MU)多输入多输出(MIMO)系统中的共信道干扰问题,提出了一种基于Khatri-Rao积的3D预编码方法。该方法首先产生离线码本,然后各用户分别选择与水平维和垂直维信道最匹配的的码字并将其反馈给基站端,最后,根据提出的KhatriRao积基站端构造3D预编码矩阵,对不同用户数据进行处理。理论分析和仿真结果表明,该方法可有效地匹配真实信道状态信息(CSI),而且可有效地抑制共信道干扰,提升系统误码性能,对系统的性能优化有一定的参考价值。In order to solve the problem of co-channel interference（CCI） in downlink 3D（Three Dimen鄄sion） MU-MIMO（Multi-user Multiple Input Multiple Output）system,a precoding method based on Khatri-Rao product is proposed. Firstly,outline codebook is designed,and then the user selects the best horizon-tal dimension precoding codeword and vertical dimension precoding codeword respectively,and feeds backto the base station,finally base station constructs 3D precoding matrix according to the proposed Khatri-Rao product and processes different users爷data. Both theoretical analysis and simulations indicate that theproposed method can not only match the authentic channel state information（CSI） but also effectively sup-press the co-channel interference and improve system bit error rate（BER） performance. The research inthis paper has a certain reference value for the system optimization.

关 键 词：多用户MIMO 3D信道模型 预编码矩阵 有限反馈 KHATRI-RAO积 

分 类 号：TN929.5[电子电信—通信与信息系统]