Implementation of a Visible Light Communication Link: Li-Fi with Smartphone Detection

Abstract

The average bandwidth per user increases daily, being necessary to present solutions that can satisfy this growth. One possible solution is to explore the light emitting diodes (LED) features. Visible Light Communications (VLC) is an emerging technology that presents several advantages comparing to other alternatives that currently exist on the market. This solution can be use simultaneously for illumination and data transmission, being an economical alternative to wi-fi. In this work we proposed the use of a mobile phone camera combined with an application to attain a bitrate up to 1 kbit/s with BER lower that 10-3. The concept of colour shift multiplexing/modulation was explored showing the capacity to successfully increase the aggregate bitrate in a 3 time fold.