Visible Light Communication Based Data Transfer System

Abstract: Exploiting the increasingly wide use of Light Emitting Diode (LED) lighting, in this project, we present the phenomenon of using visible LED lights for data transfer and position determination. We have implemented the Visible Light Communication (VLC) system and evaluated it with a small-scale hardware. The basic idea is to use the existing lighting infrastructure and apply it for data transfer. Through the design of transmission and reception mechanism,we identify and tackle several technical challenges. We adopt the simple On-Off keying (OOK)for modulation in the transmitter section. The receiver section comprises of phototransistor and its amplification unit followed by Bluetooth module to ensure its connectivity to a smart phone. We believe that visible light based data transferis promising to significantly improve the positioning accuracy,despite few open problems in practice.

Keywords: LED, OOK, VLC.