Angle diversity receiver as a key enabler for reliable ORIS-based Visible Light Communication

TL;DR

This paper demonstrates that combining angle diversity receivers with optical reconfigurable intelligent surfaces significantly improves the reliability and performance of visible light communication systems, especially in mitigating link blockages.

Contribution

It introduces a novel integration of ADR and ORIS in multiuser VLC systems, showing their combined effectiveness and proposing an optimization algorithm for fair network deployment.

Findings

Achieves up to 30 dB SNR gain with ADR and ORIS integration.

Effectively mitigates link blockages and out-of-FoV issues.

Single-tier ADR is sufficient to complement ORIS in VLC.

Abstract

Visible Light Communication (VLC) offers a promising solution to satisfy the increasing demand for wireless data. However, link blockages remain a significant challenge. This paper addresses this issue by investigating the combined use of angle diversity receivers (ADRs) and optical reconfigurable intelligent surfaces (ORISs) in multiuser VLC systems. We consider ORIS elements as small movable mirrors. We demonstrate the complementarity of ADR and ORIS in mitigating link blockages, as well as the advantages of using a larger number of ORIS elements due to the increased field-of-view (FoV) at the receiver enabled by the ADR. An optimization algorithm is proposed to maximize the minimum signal-to-noise power ratio (SNR) to deploy a fair communication network. Numerical results show that integrating ADR and ORIS significantly enhances VLC communication performance, achieving an SNR gain of up to 30 dB compared to a system without ORIS, and mitigating communication outages produced by link blockages or out-of-FoV received signals. We also prove that an ADR with a single tier of photodiodes is sufficient to complement ORIS-assisted VLC.