# Transmitter Diversity with Beam Steering

## TL;DR

This paper presents a high-speed visible light communication system utilizing transmitter diversity with beam steering, employing RYGB laser diodes and a seven-branch angle diversity receiver to achieve data rates up to 22.8 Gb/s.

## Contribution

It introduces a novel VLC system combining transmitter diversity with beam steering and RYGB laser diodes for enhanced data rates.

## Key findings

- Achieved data rates up to 22.8 Gb/s with simple OOK modulation.
- Demonstrated improved performance over normal VLC systems.
- Studied delay spread and SNR with a seven-branch angle diversity receiver.

## Abstract

Providing high data rates is one of the drivers in visible light communication (VLC) systems. This paper introduces a VLC system that employs transmitters diversity with beam steering to provide high data rates. In this work, red, yellow, green, and blue (RYGB) laser diodes (LD) are used as transmitters to obtain a high modulation bandwidth. Two types of RYGB LDs units are used in this paper: transmitters diversity (TD) RYGB LDs light unit (for illumination and communication) and RYGB LDs light unit (for illumination). In addition, a seven branch angle diversity receiver (ADR) is used where we study the delay spread and SNR. The proposed system was compared to the normal VLC system. A data rate up to 22.8 Gb/s was achieved using simple on-off-keying (OOK) modulation.

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Source: https://tomesphere.com/paper/1903.10923