Visible Light Communication (VLC)
mbedded.ninja Author
warning
This page is in notes format, and may not be of the same quality as other pages on this site.
Overview
Visible light communication (VLC) is a family of communication protocols which use visible light (electromagnetic radiation between 400-800THz, or 375-780nm) to transfer information. Light sources such as LEDs are used to send information, and receivers such as photodiodes, phototransistors and arrays of such (eg. cameras) are used as receivers.
Modulation
- Amplitude Switch Keying (ASK)
- Phase Switch Keying (PSK)
- Frequency Switch Keying (FSK)
- On-Off Keying
Li-Fi
Li-Fi is a VLC communication protocol which uses the ultraviolet, visible and infrared spectrum to transmit data at high speeds.