With the explosive increase of internet traffic, the next-generation of communication, a.k.a. 6G, is coming and envisioned to meet the full connectivity demands of the future digital society. Visible light communication (VLC) is considered to be an important role in 6G thanks to its huge spectrum, high energy efficiency and security. Generally, there are two kinds of typical VLC, namely photodiode-based VLC and camera-based VLC, where both two can share the same transmitters piggybacked on LED lighting infrastructure, but the receivers are photodiodes and cameras respectively. The former can normally achieve very high data rate over 10 Gbps but to be easily affected by the nonlinearity of LED, whereas the latter provides only kbps level data rate due to the low sampling ability of camera under communication mode. To address aforementioned issues and push VLC into realistic applications, many researchers including our group take efforts to suppress the nonlinearity of LED and boost the data rate in VLC. Therefore, in this talk, we will first introduce the fundamental principle of VLC, and share our work on mitigating the negative effect of LED nonlinearity in photodiode-based VLC and improving the data rate of camera-based VLC, we finally present application cases of VLC as well.

Visible Light Communication;Optical Camera Communication;LiFi;6G