Reconfigurable Intelligent Surface-Assisted Multi-Cell MISO Communication Systems Exploiting Statistical CSI

被引：28
|
作者：
Luo, Caihong [1 ]
Li, Xiao [1 ,2 ]
Jin, Shi [1 ]
Chen, Yijian [3 ,4 ]
机构：
[1] Southeast Univ, Natl Mobile Commun Res Lab, Nanjing 210096, Peoples R China
[2] Pazhou Lab, Guangzhou 510330, Peoples R China
[3] ZTE Corp, Shenzhen 518057, Peoples R China
[4] State Key Lab Mobile Network & Mobile Multimedia, Shenzhen 518057, Peoples R China
来源：
IEEE WIRELESS COMMUNICATIONS LETTERS | 2021年 / 10卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Array signal processing; Optimization; Downlink; Transmission line matrix methods; Matrix decomposition; Approximation algorithms; Wireless communication; RIS; statistical CSI; fractional programming; multi-cell; POWER-CONTROL;
D O I：
10.1109/LWC.2021.3100427
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 investigate the reconfigurable intelligent surface (RIS) assisted multi-cell downlink multi-input single-output system under the assumption of only statistical channel state information at the base stations and RIS. Firstly, a closed-form ergodic weighted sum rate approximation is obtained. Then, based on this approximation, we propose an approximate optimal joint beamforming vectors and RIS phase shift matrix design algorithm utilizing the fractional programming and complex circle manifold. Simulation results show that the proposed low-complexity algorithm performs well.
引用
收藏
页码：2313 / 2317
页数：5
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