Analysis on Modulation and Demodulation Techniques for Visible Light Communication

Visible Light Communications (VLC) is a wireless communication system for enhanced 5G and 6G high speed wireless networks. VLC is one of the most accepted varieties of short-range wireless communication. With a large number of mobile devices, high-speed data transmission is an essential one. VLC uses an intensity modulation as well as direct recognition for illumination and data transmit. VLC is a disruptive form of wireless communication that supplements radio frequency communication. Demodulation of radio signals plays an important role in VLC systems. Artificial intelligence (AI) addressed the distinctive challenges in VLC. AI techniques are explored to overcome the unique challenges in VLC, whereas significant barriers are found in practical VLC systems applied with intelligent learning approaches. Machine learning (ML) illustrates potential challenges in non-linear extenuating for their natural capability to fit every sort of transfer function in VLC. Different modulation methods are studied for performing efficient visible light communication. However, the bit error rate was not minimized as well as accuracy level was not enhanced. To address these issues, different modulation and demodulation methods were reviewed.