电信科学 ›› 2011, Vol. 27 ›› Issue (10): 94-97.doi: 10.3969/j.issn.1000-0801.2011.10.021

• 研究与开发 • 上一篇    下一篇

一种改进的SLNR多用户MIMO预编码方法

易正琨1,2,熊勇3,4,杨秀梅3,4,雷舒培1,2   

  1. 1 中国科学院上海微系统与信息技术研究所 上海200050
    2 中国科学院研究生院 北京100049
    3 上海无线通信研究中心 上海200335
    4 中国科学院无线传感网与通信重点实验室 上海200335
  • 出版日期:2011-10-15 发布日期:2011-10-15
  • 基金资助:
    国家科技重大专项基金资助项目;国家科技重大专项基金资助项目;国家科技重大专项基金资助项目

A Modified SLNR Method for MU-MIMO Precoding

Zhengkun Yi1,2,Yong Xiong3,4,Xiumei Yang3,4,Shupei Lei1,2   

  1. 1 Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China
    2 Graduate University of Chinese Academy of Sciences,Beijing 100049,China
    3 Research Center for Wireless Communications,Shanghai 200335,China
    4 Key Laboratory of Wireless Sensor Network＆Communication,Chinese Academy of Sciences,Shanghai 200335,China
  • Online:2011-10-15 Published:2011-10-15

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摘要：

MU-MIMO 系统中，基站在相同的时间与频率资源上与多个用户进行通信，导致不同用户之间存在同信道干扰。SLNR 预编码方法将联合优化的问题转化成若干个独立优化问题，在系统性能与复杂度之间取到很好的折中。提出了一种改进的 SLNR 预编码方法，该方法在泄漏信号的基础上，考虑干扰信号的影响，对预编码向量进行迭代优化。仿真结果表明，与 SLNR 方法相比，该方法在理想CSI 和非理想CSI 情况下都可以进一步提高系统的吞吐量。

关键词: MU-MIMO系统, 预编码, SLNR方法

Abstract:

In the multi-user multiple input multiple output（MU-MIMO）system,a base station communicates with multiple users in the same time and spectral resources that results in co-channel interference（CCI）among users.Signal-to-leakage-plus-noise ratio（SLNR）precoding method transforms a joint optimization problem into several independent ones and makes a satisfying tradeoff between system performance and complexity.In this paper,we propose a modified SLNR precoding scheme that takes the effect of interference signal as well as the leakage signal into consideration,and makes iterative optimization of the precoding vectors.Simulation results show that,compared to SLNR method,the proposed method is able to increase system throughput no matter channel state information（CSI）is perfect or not.

Key words: MU-MIMO system, precoding, SLNR method

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