Visible Light Communications and LiFi

Exploring new electromagnetic spectra for wireless transmission has led to the research and development of visible light communication (VLC). This chapter introduces, a series of important technologies that can be used in VLC and LiFi networks. It focuses on photodiodes and PV cells as detectors due to their capabilities in achieving multi-Gbps VLC. The chapter introduces a number of useful methods to calculate NLoS channels in VLC and LiFi systems. However, when the indoor environment becomes less similar to the interior of a spherical space, the accuracy of the simplified sphere model decreases significantly. In some cases, the magnitude of the NLoS channel calculated using the simplified sphere model can be 10 dB smaller than that simulated using the frequency domain method. If the computation involves a large number of NLoS channels and the accuracy requirement is medium or low, the simplified sphere model and analytical methods are more suitable options.