多小区MIMO系统中的分布式预编码研究

Distributed precoding for multicell MIMO networks

对多小区MIMO系统中的预编码问题进行了研究。为了降低多小区协作的信道信息(CSI)交换量和基站的计算复杂度,提出了分布式预编码矩阵设计方法。将基于最大化信漏噪比(SLNR)的预编码设计准则引入多小区协作中,提出了基于SLNR的预编码矩阵设计方法。基于SLNR的分布式预编码设计方法解决了多小区协作预编码设计中需要中央控制器的问题,而且降低了基站的计算复杂度。另外,还给出了基于匹配准则的预编码矩阵的设计方案。仿真表明:这二种预编码方案与现有方案相比,可获得更好的吞吐量性能。

Precoding for multicell MIMO networks is investigated in this paper.In order to decreasing the amount of CSI among base stations,two distributed precoding algorithms are proposed.The precoding design criteria based on maximizing the signal to leakage plus noise ratio（SLNR） is introduced into multicell cooperative processing,and a distributed precoding design algorithm is proposed,which decreases the calculation complexity of the stations.Matched filter（MF） scheme is also proposed,and another precoding design algorithm is also presented.Computer simulation results show that the proposed precoding design schemes outperform the existing method in terms of the sum capacity of MIMO networks.