利用干扰提高容量的低复杂度预编码方法  

An Utilizing-Interference and Increasing-Capacity Precoding with Low Complexity

作　　者：解芳[1] 袁超伟[1] 程铁铮[1] 

机构地区：[1]北京邮电大学信息与通信工程学院,北京100876

出　　处：《北京邮电大学学报》2009年第5期114-118,共5页Journal of Beijing University of Posts and Telecommunications

基　　金：国家自然科学基金项目(60872149;60672132)

摘　　要：在接收用户配置单天线的多输入多输出广播系统(MIMO BC)中,提出了一种利用干扰提高系统容量的低复杂度预编码方法.该方法将多用户系统转化为若干个独立的两用户或单用户系统,在两用户系统中建立一种基于向量的模型,以系统容量最大化为目标求解预编码向量及功率分配.仿真结果表明,本文方法在容量接近最小均方误差(MMSE)预编码的同时复杂度更低,约为MMSE的1/3.A precoding method utilizing interference is proposed in multiple-input multiple-output broadcasting system （MIMO BC） in which each receiver has one antenna. This method turns a multiuser system into a number of independent two-user or one-user systems. In two-user system a new model based on vector is established, and with the objective of maximizing system capacity the optimal precoding vectors and power allocation are derived. Simulations show that the proposed method has the similar capacity with minimum mean square error （MMSE） precoding but reduces complexity with about one-third of MMSE＇s complexity.

关 键 词：多输入多输出广播系统 预编码 干扰 容量 复杂度 

分 类 号：TN911.22[电子电信—通信与信息系统]