The repeater system for visible light communication

Visible Light Communication (VLC) Technology is the short range optical wireless communication technology using LEDs for communication and illumination. In this paper, we propose a repeater system for visible light communication to extend the coverage. Our proposed repeater system is composed of hardware and software components. The transmitter converts text data sending from the user into light signal data by using the on-off keying modulation (OOK) technique and transmits this signal via LED. The repeater receives light signal data by photodiode then transmits it out again. With this method, light signal is amplified at each repeater. The receiver converts light signal data back into text data and displays it on user interface for further use. This multi-hop communication gives more flexibility in communication because it helps to increase the distance between transmitter terminal and receiver terminal. Moreover, it also helps to avoid obstacle objects, such as walls, because VLC is a line-of-sight technology.