北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2009, Vol. 32 ›› Issue (5): 114-118.doi: 10.13190/jbupt.200905.114.372

• 研究报告 • 上一篇    下一篇

利用干扰提高容量的低复杂度预编码方法

解芳;袁超伟;程铁铮   

  1. (北京邮电大学 信息与通信工程学院, 北京 100876)
  • 收稿日期:2009-02-19 修回日期:2009-08-17 出版日期:2009-10-28 发布日期:2009-10-28
  • 通讯作者: 解芳

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

XIE Fang,YUAN Chao-wei,CHENG Tie-zheng   

  1. (School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China)
  • Received:2009-02-19 Revised:2009-08-17 Online:2009-10-28 Published:2009-10-28
  • Contact: YUAN Chao-wei

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.

关键词: 多输入多输出广播系统, 预编码, 干扰, 容量, 复杂度

Abstract:

A precoding method utilizing interference is proposed in multiple-input multipl
e-output broadcasting system (MIMO BC) in which each receiver has one antenna. This method turns a multi-user 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.

Key words: multiple input multiple output broadcasting system, precoding, interference, capacity, complexity