计算机工程

• 移动互联与通信技术 • 上一篇    下一篇

MIMO干扰信道中改进的干扰消除方法

田心记,李晓静   

  1. (河南理工大学 计算机科学与技术学院,河南 焦作 454000)
  • 收稿日期:2015-10-09 出版日期:2016-10-15 发布日期:2016-10-15
  • 作者简介:田心记(1983—),女,讲师、博士,主研方向为MIMO技术、干扰消除;李晓静,硕士研究生。
  • 基金项目:
    河南省高等学校矿山信息化实验室开放基金资助项目(KY2015-01);河南省高校基本科研业务费专项基金资助项目(NSFR F140126);河南理工大学博士基金资助项目(B2012-063)。

Improved Interference Cancellation Method for MIMO Interference Channel

TIAN Xinji,LI Xiaojing   

  1. (School of Computer Science and Technology,Henan Polytechnic University,Jiaozuo,Henan 454000,China)
  • Received:2015-10-09 Online:2016-10-15 Published:2016-10-15

摘要:

对于含3个用户且每个用户配置4根天线的MIMO干扰信道,提出一种新的干扰消除方法。为每个用户设计4×4的空时码字,该码字具有Alamouti码字的结构。采用单向协作链路,消除第1个接收端的多用户干扰。通过干扰对齐预编码,使得第2个接收端和第3个接收端收到的干扰码字对齐,并利用Alamouti码字对应的等效信道矩阵的正交特性,消除这2个接收端的多用户干扰。实验结果表明,该方法的分集增益为8,高于相同场景中的干扰消除方法,并且具有较高的系统容量和可靠性。

关键词: 干扰信道, 空时码字, 多用户干扰, 干扰对齐, 预编码, 分集增益

Abstract: An improved interference cancellation method is proposed for MIMO interference channel with three users each of which equipped with four antennas.4×4 space-time codeword with Alamouti code structure is designed.The multi-user interference at the first receiver is cancellated by the unidirectional operational link.Then,the interfering codeword are aligned at the second and the third receivers through interference alignment pre-coding.Multi-user interference at these two receivers is cancellated by the orthogonal properity of the effective channel matrices for Alamouti code.Experimental result shows that the diversity gain of the proposed method is 8,higher than that of the existing interferenc acncellation method for the same scene.And it has higher system capacity and reliability.

Key words: interference channel, space-time codeword, multi-user interference, interference alignment, pre-coding, diversity gain

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