基于分布式空时干扰对齐的MIMO干扰信道自由度研究

应腾达; 冯文江; 蒋卫恒; 刘国岭; 姚楚楠; 包涛涛

doi:10.11959/j.issn.1000-436x.2018017

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基于分布式空时干扰对齐的MIMO干扰信道自由度研究

学术论文 | 更新时间：2024-06-05

- 基于分布式空时干扰对齐的MIMO干扰信道自由度研究
- Degrees of freedom of MIMO interference channel with distributed space-time interference alignment
- 通信学报 2018年39卷第1期页码：137-146
- 作者机构：
  
  重庆大学通信工程学院，重庆 400044
- 作者简介：
  
  [ "应腾达（1991-），男，浙江永康人，重庆大学博士生，主要研究方向为MIMO无线通信、信息论等。" ]
  [ "冯文江（1963-），男，四川西充人，重庆大学教授、博士生导师，主要研究方向为宽带无线接入技术、认知无线电、通信信号处理等。" ]
  [ "蒋卫恒（1985-），男，湖北枝江人，重庆大学讲师，主要研究方向为无线通信与网络、移动云计算等。" ]
  [ "刘国岭（1989-），男，辽宁北票人，重庆大学硕士生，主要研究方向为MIMO无线通信、全双工等。" ]
  [ "姚楚楠（1994-），男，湖南娄底人，重庆大学硕士生，主要研究方向为MIMO无线通信、移动边缘计算等。" ]
  [ "包涛涛（1993-），男，湖北孝感人，重庆大学硕士生，主要研究方向为MIMO无线通信、图像处理等。" ]
- 基金信息：
  
  中央高校基本科研业务费基金资助项目(106112016CDJXY500002);重庆市基础科学与前沿技术研究重点基金资助项目(cstc2017jcyjBX0047);重庆市基础科学与前沿技术研究重点基金资助项目(cstc2015jcyjA40021)
- DOI：10.11959/j.issn.1000-436x.2018017
  中图分类号： TN919.1
- 网络出版日期：2018-01，
  
  纸质出版日期：2018-01-25
- 稿件说明：
移动端阅览
应腾达, 冯文江, 蒋卫恒, 等. 基于分布式空时干扰对齐的MIMO干扰信道自由度研究[J]. 通信学报, 2018,39(1):137-146.

Tengda YING, Wenjiang FENG, Weiheng JIANG, et al. Degrees of freedom of MIMO interference channel with distributed space-time interference alignment[J]. Journal on communications, 2018, 39(1): 137-146.
应腾达, 冯文江, 蒋卫恒, 等. 基于分布式空时干扰对齐的MIMO干扰信道自由度研究[J]. 通信学报, 2018,39(1):137-146. DOI： 10.11959/j.issn.1000-436x.2018017.

Tengda YING, Wenjiang FENG, Weiheng JIANG, et al. Degrees of freedom of MIMO interference channel with distributed space-time interference alignment[J]. Journal on communications, 2018, 39(1): 137-146. DOI： 10.11959/j.issn.1000-436x.2018017.

摘要

针对K个用户MIMO干扰信道（IC），研究基于分布式空时干扰对齐（DSTIA）的信道可达自由度。利用分布式当前和过期发射端信道状态信息（CSIT）设计预编码，分别给出MISO系统可达自由度关于CSI反馈时延和反馈频率的折中域；分析发射端天线数对MISO系统可达自由度的影响，导出逼近系统自由度外界的条件。进一步研究 MIMO 系统接收端天线数对系统自由度的影响，给出保持系统可达自由度的 CSI 反馈时延范围。理论和数值分析表明，所提 DSTIA 方案能充分消除用户间干扰，获得更高的自由度增益，缩小可达界与外界的差距，提高系统的可达速率。

Abstract

In the context of K-user MIMO interference channel (IC)

achievable degrees of freedom (DoF) were investigated with distributed space-time interference alignment (DSTIA).By precoding with distributed current and outdated channel state information at the transmitters (CSIT)

new tradeoff regions between achievable DoF and CSI feedback delay/frequency were achieved for MISO system.The impact of the number of transmit antennas on achievable DoF in the MISO system was analyzed

revealing that DoF results approach to the outer bound as the number of transmit antennas increases.Further

the impact of the number of receive antennas on achievable DoF was characterized

deriving the range of CSI feedback delay that preserves achievable DoF in the MIMO system.Theoretical and numerical analyses show that

the proposed DSTIA scheme can achieve better sum-DoFs by eliminating inter-user interference perfectly

tighten the gap between achievable DoF and outer bound

as well as improve the achievable rate of the system.

关键词

Keywords

references

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