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요약정보
基于IRS辅助的MIMO车联网系统联合波束成形设计 / Joint beam forming design for IRS-aided MIMO Internet of vehicles system
Resource Type
Academic Journal
Authors
张雷
;
王玉
;
田建杰
;
张琳
;
章天骄
;
ZHANG Lei
;
WANG Yu
;
TIAN Jianjie
;
ZHANG Lin
;
ZHANG Tianjiao
Source
通信学报 / Journal on Communications
. 44(2):59-69
Subject
智能反射面
车联网
MIMO
波束成形
凸优化
Language
Chinese
ISSN
1000-436X
Online Access
Scopus
Find it @ DONGA
초록
针对MIMO车联网系统中V2I和V2V共享频谱的情形,提出了一种IRS辅助的联合波束成形设计方法.在保证V2V用户数据速率需求、V2I基站发射功率受限和IRS反射相移模约束等条件下,以最大化V2I用户的信道容量为目标,联合优化基站端发送预编码和IRS端的反射相移矩阵.采用最小均方误差规则、矩阵分析理论和内逼算法把非凸且变量耦合的优化问题转换为解耦后的凸优化问题,并提出一种交替迭代优化算法获得原问题的解.对所提算法的性能进行仿真,分析了IRS反射单元数、IRS部署位置和车速对车联网频谱效率的影响.仿真结果表明,所提算法收敛性较好,若在基站附近部署IRS,利用所提的联合波束成形方法能最大限度地提高车联网频谱效率.
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