双层异构网络中基于有限反馈的空时干扰对齐研究

李劲夫; 冯文江; 杨崇海; 邹永琪

doi:10.12263/DZXB.20210166

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双层异构网络中基于有限反馈的空时干扰对齐研究

学术论文 | 更新时间：2025-12-08

- 双层异构网络中基于有限反馈的空时干扰对齐研究
- Research on Space-Time Interference Alignment with Limited Feed-Back in Two-Tier Heterogeneous Networks
- 电子学报 2023年51卷第6期页码：1518-1526
- 作者机构：
  
  重庆大学微电子与通信工程学院，重庆 400044
- 作者简介：
  
  [ "李劲夫男，1993年生，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.E-mail: jingfuli@cqu.edu.cn" ]
  [ "冯文江（通讯作者）男，1963年生，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、无线通信技术和宽带无线接入技术等." ]
- 基金信息：
  
  重庆市基础科学与前沿技术研究重点基金(cstc2017jcyjBX0047)
- DOI：10.12263/DZXB.20210166
  中图分类号： TN92;
- 收稿：2021-01-26，
  
  修回：2023-03-10，
  
  纸质出版：2023-06-25
- 稿件说明：
移动端阅览
李劲夫,冯文江,杨崇海等.双层异构网络中基于有限反馈的空时干扰对齐研究[J].电子学报,2023,51(06):1518-1526.

LI Jing-fu,FENG Wen-jiang,YANG Chong-hai,et al.Research on Space-Time Interference Alignment with Limited Feed-Back in Two-Tier Heterogeneous Networks[J].ACTA ELECTRONICA SINICA,2023,51(06):1518-1526.
李劲夫,冯文江,杨崇海等.双层异构网络中基于有限反馈的空时干扰对齐研究[J].电子学报,2023,51(06):1518-1526. DOI： 10.12263/DZXB.20210166.

LI Jing-fu,FENG Wen-jiang,YANG Chong-hai,et al.Research on Space-Time Interference Alignment with Limited Feed-Back in Two-Tier Heterogeneous Networks[J].ACTA ELECTRONICA SINICA,2023,51(06):1518-1526. DOI： 10.12263/DZXB.20210166.

摘要

本文针对双层异构网络，提出一种利用当前和过期发射端信道状态信息（Channel State Information at the Transmitters，CSIT）的异构空时干扰对齐（Heterogeneous Space-Time Interference Alignment，HSTIA）方案.该方案将空时干扰对齐拓展至双层异构网络MISO（Multiple Input Single Output）混合信道，研究可达自由度关于CSI（Channel State Information）反馈时延的折中域.结果表明，增加发射端天线数能有效提高可达自由度.基于该结论，将空时干扰对齐技术扩展至双层异构网络MIMO（Multiple Input Multiple Output）混合信道，分析MIMO系统发射端与接收端天线数比对系统自由度的影响，并进一步研究系统达到该自由度时CSI反馈时延的取值范围.结果表明，当发射端与接收端天线数比足够多时，系统自由度的稳健性随接收端天线数的增加而加强.通过仿真分析验证，HSTIA方案利用本地当前和过期CSIT执行发射预编码，实现不同时隙的干扰信号相互消除，从而获得自由度增益，以提高系统的可达速率.

Abstract

In the context of two-tier heterogeneous networks

a heterogeneous space-time interference alignment (HSTIA) scheme using current and outdated channel state information at the transmitters (CSIT) is proposed. First

the space-time interference alignment technology is extended to the two-tier heterogeneous network MISO (Multiple Input Single Output) hybrid channel

and the compromised domain of the achievable degree of freedom on the CSI (Channel State Information) feedback delay is studied. The results show that the achievable degree of freedom is affected by the number of antennas at the transmitters. Then

the space-time interference alignment technology is extended to the two-tier heterogeneous network MIMO (Multiple Input Multiple Output) hybrid channel. The impact of the ratio of the number of antennas at the transmitters and the receivers of the MIMO system on the degree of freedom of the system is analyzed. Further

the range of the CSI feedback delay when the system achieves the degree of freedom is studied. The results show that when the ratio of the number of antennas at the transmitters to the receivers is sufficient

the robustness of the total degree of freedom of the MIMO system increases with the increase of the number of antennas at the receivers. Theoretical and numerical analyses show that

by precoding with current and outdated CSIT

HSTIA can achieve better sum-DoF by eliminating inter-user interference perfectly

as well as improve the achievable rate of the system.

关键词

Keywords

references

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