Visible Light Communication: VLC

            Visible light communication (VLC) is a fascinating and emerging communication technology employing visible light with spectrum between 400 THz and 790 THz for both illumination and data communication. Signal is transmitted with LED (about 10 Mbps) by their intensity modulations. Several modulation techniques could be adopted e.g. on/off keying (OOK) which is the main output for the system. The VLC uses LEDs to send data by flashing light at undetectable speeds to human eyes. Its applications can be found in office broadband communications, secured communications, hybrid energy and communications, and smart home.

               The main target of this project is to research and develop a prototype of VLC for Internet connections. Figure 1 shows the project scenario where the visible light source is used.

Figure 1 Project scenario

                  In the project, two main devices – an access point and an air card – need to be developed. The diagram of the former and that of the latter are presented in Figures 2 and 3, respectively.

Figure 2 A block diagram of an access point

Figure 3 A block diagram of an air card

Other information is provided below.

• Project duration:

                    One year

• Main contribution:

                    A field prototype of visible light local area network (LAN) upto 10 Mbps data transmission rate

• Project status:

                    -

• Project head:

                    Mr. Paramin Sangwongngam

• Project partner:

                    -