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Reconfigurable Intelligent Surface (RIS) Assisted Wireless Coverage Extension: RIS Orientation and Location Optimization
arXiv - CS - Emerging Technologies Pub Date : 2020-09-17 , DOI: arxiv-2009.08038
Shuhao Zeng, Hongliang Zhang, Boya Di, Zhu Han, Lingyang Song

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.

中文翻译:

可重构智能表面 (RIS) 辅助无线覆盖扩展:RIS 方向和位置优化

最近,可重构智能表面 (RIS) 因其通过向接收器反射信号来扩展小区覆盖范围的能力而引起了很多关注。在这封信中,我们分析了具有一个基站 (BS) 和一个用户设备 (UE) 的下行 RIS 辅助网络的覆盖范围。由于RIS方向和RIS与BS之间的水平距离对小区覆盖有显着影响,我们制定了一个RIS布局优化问题,通过优化RIS方向和水平距离来最大化小区覆盖。为了解决公式化的问题,提出了一种覆盖最大化算法(CMA),其中获得了一个封闭形式的最优 RIS 方向。数值结果验证了我们的分析。
更新日期:2020-09-18
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