Passive Beamforming for IRS Aided Wireless Networks

被引：10
作者：
Huang, Ke-Wen [1 ,2 ]
Wang, Hui-Ming [1 ,2 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Informat & Commun Engn, Xian 710049, Peoples R China
[2] Xi An Jiao Tong Univ, Minist Educ, Key Lab Intelligent Networks & Network Secur, Xian 710049, Peoples R China
来源：
IEEE WIRELESS COMMUNICATIONS LETTERS | 2020年 / 9卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Array signal processing; Signal to noise ratio; Optimization; Multicast communication; Downlink; Complexity theory; Wireless communication; Intelligent reflecting surface; passive beamforming; signal-to-noise ratio balancing;
D O I：
10.1109/LWC.2020.3011596
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
In this letter, we design passive beamforming in an intelligent reflecting surface (IRS) assisted multiple-user wireless network. Two different scenarios are considered, namely, multicasting and multi-user downlink transmission. We optimize the passive beamforming vector of the IRS to maximize the smallest signal-to-noise ratio of the users in both scenarios. Based on the alternating direction method of multipliers algorithm, a low complexity method is designed to iteratively solve the established problem. In each iteration of the proposed method, the solution is in closed form, and thus the computation complexity is low. Numerical results are presented to show the efficiency of the proposed method.
引用
收藏
页码：2035 / 2039
页数：5
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