通信学报 ›› 2021, Vol. 42 ›› Issue (6): 94-106.doi: 10.11959/j.issn.1000-436x.2021092

• 学术论文 • 上一篇    

下行MIMO广播信道中基于偏袒干扰消除的回溯干扰对齐方案

李劲夫1, 冯文江1, 王文收2, 蒋卫恒1, 杨崇海1   

  1. 1 重庆大学微电子与通信工程学院,重庆 400044
    2 中国人民解放军32707部队,北京 100071
  • 修回日期:2021-03-25 出版日期:2021-06-01 发布日期:2021-06-01
  • 作者简介:李劲夫(1993− ),男,四川成都人,重庆大学博士生,主要研究方向为第五代移动通信技术、干扰管理技术等
    冯文江(1963− ),男,四川西充人,博士,重庆大学教授,主要研究方向为现代通信技术与系统、无线通信技术、宽带无线接入技术等
    王文收(1986− ),男,四川成都人,中国人民解放军 32707 部队工程师,主要研究方向为现代通信技术与系统、抗干扰管理系统等
    蒋卫恒(1985− ),男,湖北枝江人,博士,重庆大学副研究员,主要研究方向为无线通信与网络、通信信号处理、大数据与机器学习算法及应用等
    杨崇海(1995− ),男,浙江温州人,重庆大学硕士生,主要研究方向为异构网络、干扰对齐等
  • 基金资助:
    重庆市基础科学与前沿技术研究重点基金资助项目(cstc2017jcyjBX0047);国家自然科学基金资助项目(62001067)

Partial interference elimination based retrospective interference alignment scheme in the downlink MIMO broadcast channel

Jingfu LI1, Wenjiang FENG1, Wenshou WANG2, Weiheng JIANG1, Chonghai YANG1   

  1. 1 School of Microelectronics and Communication Engineering, Chongqing University, Chongqing 400044, China
    2 People’s Liberation Army of China 32707 Unit, Beijing 100071, China
  • Revised:2021-03-25 Online:2021-06-01 Published:2021-06-01
  • Supported by:
    Chongqing Basic Science and Frontier Technology Research Project(cstc2017jcyjBX0047);The National Natural Science Foundation of China(62001067)

摘要:

针对具有反馈时延的单小区多用户MIMO蜂窝干扰网络,采用时延度(DoD)来量化干扰对齐方案引起的信息时延,提出一种基于偏袒干扰消除的回溯干扰对齐(PIE-RIA)方案。该方案首先在中继处获取干扰符号并设计预编码矩阵,然后中继发送已编码的干扰符号至用户执行干扰消除,最后基站利用反馈的干扰信号与CSI实现多个用户的回溯干扰对齐。仿真结果表明,PIE-RIA方案在保留自由度(DoF)增益的同时降低了DoD,保证了时延敏感网络中信息传输的实时性。

关键词: 时延敏感网络, 回溯干扰对齐, 偏袒干扰消除, 自由度, 时延度

Abstract:

For interference networks, the degree of delay (DoD) was proposed to quantify the information delay among traditional interference alignment (IA) schemes.It indicated that networks suffer from the issue of latency caused by IA schemes.Herein, for the MIMO downlink broadcast channel (BC), the partial interference elimination based retrospective interference alignment scheme (PIE-RIA) was put forward.In the scheme, relay technique was adopted to eliminate partial interference signals so that part of desired symbols could be decoded promptly in user sides.Meanwhile, in the last slot, the eliminated signals could be regenerated in base station side with the retrospective interference alignment (RIA) scheme .The simulation results show that PIE-RIA scheme maintains degree of freedom (DoF) gain of RIA scheme and in the meantime, achieves lower DoD than the other schemes.

Key words: delay sensitive network, retrospective interference alignment, partial interference elimination, degree of freedom, degree of delay

中图分类号: 

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