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计算机工程

• 移动互联与通信技术 • 上一篇    下一篇

一种适用于MIMO多路中继信道的Lattice编码方案

赵翔  1,2,3,魏天伟  1,2,3   

  1. (1.中国科学院上海微系统与信息技术研究所,上海 200050;2.中国科学院大学,北京100049; 3.上海科技大学,上海 201210)
  • 收稿日期:2017-01-12 出版日期:2018-02-15 发布日期:2018-02-15
  • 作者简介:赵翔(1992—),男,硕士研究生,主研方向为移动通信;魏天伟,硕士研究生。

A Lattice Coding Scheme for MIMO Multi-way Relay Channel

ZHAO Xiang  1,2,3,WEI Tianwei  1,2,3   

  1. (1.Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China;2.University of Chinese Academy of Sciences,Beijing 100049,China; 3.ShanghaiTech University,Shanghai 201210,China)
  • Received:2017-01-12 Online:2018-02-15 Published:2018-02-15

摘要: 在多输入多输出情况下的多路中继信道模型里,通信过程会受到码流间干扰等因素影响,造成误码率高,通信质量不佳的问题。为此,提出一种基于嵌套Lattice的编码方案。利用Lattice对码字进行编码,并使用各层Lattice互相嵌套的关系来提升码字容量。将该方案与用户端线性预编码相结合,可以解决通信过程中的干扰问题并提升系统性能。仿真结果表明,该编码方案明显优于传统解码转发和放大转发模式,可以达到较佳的链路信道容量。

关键词: 多输入多输出技术, 编码, 多路中继, Lattice技术, 系统性能

Abstract: In the model of Multi-way Relay Channel (MRC) with multi-input multi-output,the communication process is inevitably affected by the interference of streams,resulting in high bit error rate and poor communication quality.In this paper,a coding scheme based on nested lattice is proposed.This coding scheme encodes the messages via the special geometrical mechanism of lattice,and improves the capacity with the help of nestification of different layer of lattices.The scheme can solve the communication problems and improve the performance combined with the user-side pre-coding.Simulation results show that the proposed scheme is better than the traditional Decode and Forward(DF) and Amplify and Forward(AF) scheme,and good link channel capacity can be reached.

Key words: Multiple-Input Multiple-Output(MIMO) technology, coding, multi-way relay, Lattice technology, system performance

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