- Computing & Information Technology
- Telecommunications and remote sensing
- Visible light communication
Visible light communication
Elgala, Hany Computer Enginering Department, State University of New York at Albany, Albany, New York.
Last reviewed:August 2020
- Why VLC?
- System and channel
- Dual functionality and modulation
- Transmitter and receiver
- Research challenges
- Related Primary Literature
- Additional Reading
A technology that enables wireless connectivity using the visible light spectrum. The electrical signal encoding the data to be transmitted modulates the intensity of the light source, and the optical detector generates an electrical signal proportional to the received instantaneous optical power. Communication via visible light (wavelengths in the approximate range 380–780 nm) is driven by the progress and increasing popularity of solid-state lighting technology based on light-emitting diodes (LEDs), whereby light is generated through solid-state electroluminescence. Visible light communication (VLC) is motivated by several benefits, including license-free operation, low cost, and minimal health concerns. VLC has created a whole range of interesting applications, including but not limited to data communication via lighting infrastructures, in which dual functionality of simultaneous illumination and data communication is provided. Due to the potential synergy of lighting and communication, it is unsurprising that VLC has been a subject of increasing interest in academia and industry. Nonetheless, there are a number of practical challenges to be addressed before its widespread acceptance. See also: Light-emitting diode; Vision
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