Double-Sided Beamforming in VLC Systems Using Omni-Digital Reconfigurable Intelligent Surfaces
Double-Sided Beamforming in VLC Systems Using Omni-Digital Reconfigurable Intelligent Surfaces
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DOI：
10.1109/mcom.002.2300043
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发表时间：
2024-02
影响因子：
11.2
通讯作者：
A. Ndjiongue;T. Ngatched;O. Dobre;Harald Haas;Hyundong Shin
中科院分区：
文献类型：
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作者：
A. Ndjiongue;T. Ngatched;O. Dobre;Harald Haas;Hyundong Shin
在这篇文章中，我们提出了一种称为全数字RISs（全DRISs）的可重构智能表面（RISs）的变体，它允许光的反射和折射，并应用于室内可见光通信系统。全方位DRIS包含的元件可以是反射器或折射器，也可以同时是两者。我们描述并解释了omni-ORIS的概念，建议并分析了omni-DRIS编码结构，讨论了omni-DRIS模块中使用的超材料，并提供了一个设计实例。此外，我们证明了一个全向DRIS系统的可实现的速率取决于全向DRIS元素的数量，每相移位，和积极吸收元素。此外，我们表明，可实现的速率的上限与omni-ORIS元素的数量有关，并通过讨论未来的研究方向得出结论。
In this article, we propose a variant of reconfigurable intelligent surfaces (RISs) called omni-digital-RISs (omni-DRISs), which allows both light reflection and refraction, with application to indoor visible light communication systems. The omni-DRIS contains elements which can be either reflectors or refractors, or both simultaneously. We describe and explain the concept of omni-ORIS, suggest and analyze an omni-DRIS coding structure, discuss metamaterials to be used in the omni-DRIS module, and provide a design example. Furthermore, we demonstrate that the achievable rate of an omni-DRIS system depends on the number of omni-DRIS elements, bits per phase shift, and actively absorbing elements. In addition, we show that the upper bound of the achievable rate is related to the number of omni-ORIS elements, and conclude by discussing future research directions.