Performance Analysis of MultiUser MIMO Indoor Visible Light Communication Systems

Abstract

Visible light communication (VLC) is emerging as a solution for wireless communication systems to overcome the crowded radio spectrum. VLC makes use of a large, uncontrolled free spectrum. A light emitting diode is utilized as the transmitter, while Avalanche photodiodes or PIN photodiodes are employed as the receiver. In this paper, a basic visible light communication model is studied, then two indoor visible light communication models in which the sources are positioned on the roof’s ceiling and the receivers are placed five meters away from the sources towards the ground are designed. optiSystems software was used to design visible light communication models, which include a multiple input and multiple output (MIMO) model. The Line Of Sight (LOS) channel was used as a channel between the transmitter and receiver, along with on off keying (OOK) as a modulation technique. The system’s bit error rates (BER), quality factor, and eye diagram are evaluated at different data rates.