计算机工程

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干扰信道中一种改进的干扰消除方法

针对三用户的多输入多输出干扰信道,提出一种新的基于空时编码的干扰消除方法。每个用户采用速率为2的空时分组码对每个码字进行2层预编码,一层预编码对齐第2个接收端收到的2个干扰信号,且与第3个接收端收到的干扰信号对齐,另一层预编码消除这2个接收端的多用户干扰,并结合单向协作链路消除第一个接收端的多用户干扰。仿真结果表明,与相同场景中采用Alamouti编码的干扰消除方法相比,该方法能提高传输效率,且可靠性较高。   

  1. (1.河南理工大学计算机科学与技术学院,河南 焦作 454000; 2.安阳师范学院人文管理学院,河南 安阳 455002)
  • 收稿日期:2014-05-23 出版日期:2015-07-15 发布日期:2014-07-15
  • 作者简介:田心记(1983-),女,讲师、博士,主研方向:移动通信,现代有线/无线通信技术;姜利敏,讲师、硕士。
  • 基金项目:
    国家自然科学基金资助项目“面向组合服务的智能化接入控制关键技术研究”(61300124);河南省自然科学基金资助项目“卷积混合声音信号盲分离和增强方法研究”(132300410461)。

An Improved Interference Elimination Method in Interference Channel

An interference cancellation method based on space-time code is proposed for 3-user Mulit-input Multi-output(MIMO) interference channel.Each user employs rate-2 space-time block code,and two-layer pre-coding is performed for each codeword.One layer pre-coding aligns the interference at the second user.So does the interference at the third user.The multi-user interference at these two receivers is eliminated by the other layer pre-coding.The multi-user interference is eliminated at the first receiver by unidirectional cooperative link.Simulations results show that the transmission efficiency is improved compared with the existing interference cancellation method using Alamouti coding for the same scene.This method improves the transfer efficiency,and the reliability is good.   

  1. (1.School of Computer Science and Technology,Henan Polytechnic University,Jiaozuo 454000,China; 2.College of Humanistic Management,Anyang Normal University,Anyang 455002,China)
  • Received:2014-05-23 Online:2015-07-15 Published:2014-07-15

摘要: 针对三用户的多输入多输出干扰信道,提出一种新的基于空时编码的干扰消除方法。每个用户采用速率为2的空时分组码对每个码字进行2层预编码,一层预编码对齐第2个接收端收到的2个干扰信号,且与第3个接收端收到的干扰信号对齐,另一层预编码消除这2个接收端的多用户干扰,并结合单向协作链路消除第一个接收端的多用户干扰。仿真结果表明,与相同场景中采用Alamouti编码的干扰消除方法相比,该方法能提高传输效率,且可靠性较高。

关键词: 多输入多输出干扰信道, 空时分组码, 干扰对齐, 多用户干扰, 预编码

Abstract: An interference cancellation method based on space-time code is proposed for 3-user Mulit-input Multi-output(MIMO) interference channel.Each user employs rate-2 space-time block code,and two-layer pre-coding is performed for each codeword.One layer pre-coding aligns the interference at the second user.So does the interference at the third user.The multi-user interference at these two receivers is eliminated by the other layer pre-coding.The multi-user interference is eliminated at the first receiver by unidirectional cooperative link.Simulations results show that the transmission efficiency is improved compared with the existing interference cancellation method using Alamouti coding for the same scene.This method improves the transfer efficiency,and the reliability is good.

Key words: Mulit-input Multi-output(MIMO) interference channel, space-time block code, interference alignment, multi-user interference, pre-coding

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