Effect of Illumination Intensity on LED Based Visible Light Communication System

This paper addresses the issue that lighting requirements impose on Visible Light Communication (VLC) systems in terms of the power transfer function and the Signal Noise Ratio (SNR). The effect of illumination intensity on Visible Light Communication has been investigated theoretically and experimentally based on our white LED-based system model. The communication quality declined by an increase of the illumination intensity of LED through the simulation and the experiment. When the illuminance of LED increased from 400 lx to 7000 lx, the system SNR decreased significantly from 19.4 dB to 6.3 dB. Meanwhile, the average power loss increases from 1.9 dB to 11.1 dB respectively.