Double-Sided Beamforming in OWC Systems Using Omni-Digital Reconfigurable Intelligent Surfaces release_k2vbldai5ndipafdyns36mb2t4

by Alain R. Ndjiongue, Telex M. N. Ngatched, Octavia A. Dobre, Harald Haas

Released as a article .

2022  

Abstract

In this paper, we introduce a variant of reconfigurable intelligent surfaces (RISs) called omni-digital-RISs (DRISs), which allow multiple physical processes, with application to optical wireless communications systems. The proposed omni-DRIS contains both reflectors and refractive elements, as well as elements that perform both simultaneously. We describe and explain the concept of omni-DRIS, suggest and analyze an omni-DRIS coding structure, discuss metamaterials to be used, 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 the number of unused elements. In addition, we show that the achievable rate upper bound is related to the number of omni-DRIS elements, and conclude by discussing future research directions.
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Date   2022-03-08
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arXiv  2203.03781v1
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