论文标题
优化RIS在蜂窝网络中的放置和波束形成：系统级建模的透视图
Optimizing the Placement and Beamforming of RIS in Cellular Networks: A System-Level Modeling Perspective
论文作者
论文摘要
在这封信中，我们通过考虑基站，RIS和用户之间的3维通道模型，详细介绍了可重构智能表面（RIS）辅助的蜂窝系统的系统级建模。我们证明，在每个部门的单个RIS的约束下，RI的最佳位置与基础站完全相反。我们为RIS辅助细胞系统提出了一种新型的波束形成设计，并在RIS的理想，离散和随机相位变速器的存在下得出可实现的总和速率。通过广泛的系统级评估，我们表明，与最先进的算法相比，所提出的波束形成设计可取得重大改进。
In this letter, we present in detail the system-level modeling of reconfigurable intelligent surface (RIS)-assisted cellular systems by considering a 3-dimensional channel model between base station, RIS, and user. We prove that the optimal placement of RIS to achieve wider coverage is exactly opposite to the base station, under the constraint of single RIS in each sector. We propose a novel beamforming design for RIS-assisted cellular systems and derive the achievable sum rate in the presence of ideal, discrete, and random phase shifters at RIS. Through extensive system-level evaluations, we then show that the proposed beamforming design achieves significant improvements as compared to the state-of-the-art algorithms.
