Optimization of Transmitter Semi-Angle and Ambient Noise Cancellation for Indoor Visible Light Communications

Abstract

Visible light communication (VLC) is unquestionably a viable method for dealing with the ever-increasing traffic on wireless networks. Light-emitting diodes (LEDs), which are used for lighting, can be used to convey high-speed data. The optical power determines the indoor VLC link performance. A fundamental challenge in this regard is to design an optimized design of visible light communication with the uniform power distribution and minimize the interference of the ambient light in the daytime. The optimization of transmitter semi-angle and ambient noise cancellation for indoor visible light communications is discussed in this study. The study shows that lowering the semi-angle improves average received optical power while raising power fluctuations on the receiver's plane. In order to resolve this trade-off, we use a unique and simple optimization method for calculating the appropriate transmitter semi-angle that maximizes received power while reducing power variation around the room. By adjusting the number of LED panels and their placements on the plane of the transmitter, the best configuration based on the optimization function is selected. The effects of utilizing a differential optical receiver on SNR distribution in optimal VLC indoor configuration is discussed, which results in better SNR, and the ability to suppress ambient light and other atmospheric noise. © 2023. All Rights Reserved.