Reconfigurable Intelligent Surface Optimal Placement in Millimeter-Wave Networks
Reconfigurable Intelligent Surface Optimal Placement in Millimeter-Wave Networks
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DOI：
10.1109/ojcoms.2021.3068790
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发表时间：
2021-01-01
影响因子：
7.9
通讯作者：
Chatzinotas, Symeon
中科院分区：
文献类型：
--
作者：
Ntontin, Konstantinos;Boulogeorgos, Alexandros-Apostolos A.;Chatzinotas, Symeon
本文讨论了高定向毫米波链路中的最优可重构智能表面布局问题。特别是，我们提出了一种新的系统模型，考虑到在RIS平面和RIS大小的传输光束足迹之间的关系。随后，基于该模型，我们推导出接收信号功率的端到端表达式，并且在RIS尺寸小得多或至少等于发射波束覆盖区的情况下，提供近似的封闭形式表达式。此外，建立的表达式，我们得出的最佳RIS的位置，最大限度地提高了端到端的信号噪声比。最后，我们证实了分析结果通过模拟，揭示了重要的趋势，根据系统参数的最佳RIS的位置。
This work discusses the optimal reconfigurable intelligent surface placement in highly-directional millimeter wave links. In particular, we present a novel system model that takes into account the relationship between the transmission beam footprint at the RIS plane and the RIS size. Subsequently, based on the model we derive the end-to-end expression of the received signal power and, furthermore, provide approximate closed-form expressions in the case that the RIS size is either much smaller or at least equal to the transmission beam footprint. Moreover, building upon the expressions, we derive the optimal RIS placement that maximizes the end-to-end signal-to-noise ratio. Finally, we substantiate the analytical findings by means of simulations, which reveal important trends regarding the optimal RIS placement according to the system parameters.