基于干扰对齐的认知MIMO系统频谱共享与用户调度

doi:10.3969/j.issn.1000-436x.2014.01.019

通信学报 ›› 2014, Vol. 35 ›› Issue (1): 167-172.doi: 10.3969/j.issn.1000-436x.2014.01.019

基于干扰对齐的认知MIMO系统频谱共享与用户调度

李钊,李建东,刘勤,申彪

西安电子科技大学综合业务网理论及关键技术国家重点实验室，陕西西安 710071

出版日期:2014-01-25 发布日期:2017-06-17
基金资助:
国家自然科学基金资助项目;国家自然科学基金资助项目;重大专项基金资助项目;国家重点基础研究发展计划(“973”计划)基金资助项目;高等学校引智计划基金资助项目;长江学者和创新团队发展基金资助项目;ISN基金资助项目

Interference alignment based spectrum sharing and user scheduling for cognitive radio MIMO system

Zhao LI,Jian-dong LI,Qin LIU,Biao SHEN

State Key Laboratory of Integrated Service Networks,Xidian University,Xi’an 710071,China

Online:2014-01-25 Published:2017-06-17
Supported by:
The National Natural Science Foundation of China;The National Natural Science Foundation of China;National S&T Major Project;The National Basic Research Program of China (973 Program);The 111 Project;Program for Changjiang Scholars and Innovative Research Team in University;ISN Project

摘要/Abstract

摘要：

在认知MIMO多用户通信场景中，设计基于干扰对齐的信号处理算法，将认知信号与授权信号通过相互正交的子空间进行传输，实现认知用户对授权系统空闲空间信道的无冲突利用，并根据不同信道矩阵的空间传输性能的差异，实现合理的用户调度。仿真结果表明，所提方法能够有效利用空闲空间信道资源，获得多用户分集增益，在不影响授权业务的前提下提高认知用户的传输速率。

关键词: 干扰对齐, 认知无线电, MIMO系统, 多用户

Abstract:

In communication scenario with multiple cognitive radio (CR) multi-input multi-output (MIMO) users,signal processing algorithm was designed based on interference alignment (IA) such that transmissions of cognitive and authorized signal were carried out in mutual orthogonal sub-spaces.Conflict-free utilization of spare spatial channel(s) authorized by primary system was achieved by cognitive user.Moreover,the difference of spatial transmission performance originating from various channel matrices was exploited to implement appropriate user scheduling.Simulation results show that the proposed method can utilize spare spatial channel resource effectively and obtain multiuser diversity gain.On the premise that authorized service is protected from disturbing,transmission rate of cognitive user is improved.

Key words: interference alignment, cognitive radio, MIMO system, multiuser

李钊,李建东,刘勤,申彪. 基于干扰对齐的认知MIMO系统频谱共享与用户调度[J]. 通信学报, 2014, 35(1): 167-172.

Zhao LI,Jian-dong LI,Qin LIU,Biao SHEN. Interference alignment based spectrum sharing and user scheduling for cognitive radio MIMO system[J]. Journal on Communications, 2014, 35(1): 167-172.

图/表 5

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基于干扰对齐的认知MIMO系统频谱共享与用户调度

Interference alignment based spectrum sharing and user scheduling for cognitive radio MIMO system

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