Reconfigurable Intelligent Surface (RIS) Assisted Wireless Coverage Extension: RIS Orientation and Location Optimization

被引：233

作者：

Zeng, Shuhao ^{[1
]}

Zhang, Hongliang ^{[1
,2
]}

Di, Boya ^{[1
,3
]}

Han, Zhu ^{[4
,5
]}

Song, Lingyang ^{[1
]}

机构：

[1] Peking Univ, Dept Elect, Beijing 100871, Peoples R China

[2] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA

[3] Imperial Coll London, Dept Comp, London SW7 2AZ, England

[4] Univ Houston, Dept Elect & Comp Engn, Houston, TX 77004 USA

[5] Kyung Hee Univ, Dept Comp Sci & Engn, Seoul 02447, South Korea

来源：

IEEE COMMUNICATIONS LETTERS | 2021年 / 25卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Signal to noise ratio; Optimization; Electronic mail; PIN photodiodes; Wireless communication; Downlink; Channel models; Reconfigurable intelligent surface assisted communication; coverage analysis; RIS placement optimization; PROPAGATION;

D O I：

10.1109/LCOMM.2020.3025345

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

Recently, reconfigurable intelligent surfaces (RIS) have attracted a lot of attention due to their capability of extending cell coverage by reflecting signals toward the receiver. In this letter, we analyze the coverage of a downlink RIS-assisted network with one base station (BS) and one user equipment (UE). Since the RIS orientation and the horizontal distance between the RIS and the BS have a significant influence on the cell coverage, we formulate an RIS placement optimization problem to maximize the cell coverage by optimizing the RIS orientation and horizontal distance. To solve the formulated problem, a coverage maximization algorithm (CMA) is proposed, where a closed-form optimal RIS orientation is obtained. Numerical results verify our analysis.

引用

页码：269 / 273

页数：5

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