Abstract - Light Fidelity (Li-Fi) is a Visible Light Communication (VLC) based technology that making a light as a media of communication replacing the cable wire communication. Li-fi or Light Fidelity was invented by Professor Harald Hass of university of Edinburgh. Haas says his invention, which he calls D-Light, can produce data rates faster than 10 megabits per second, which is speedier than your average broadband connection. He envisions a future where data for laptops, smartphones, and tablets is transmitted through the light in a room. And security would be a snap—if you can’t see the light, you can’t access the data. This paper presents an introduction of the Li-Fi technology including the architecture, modulation, performance, and the challenges. The result of this paper can be used as a reference and knowledge to develop some of the Li-Fi technology.

Key Words: Light Fidelity, LI-FI, WI-FI, LED, D-Light (Data Light), Visible Light Communication

| DOI: 10.17148/IARJSET.2021.8220