Underwater wireless communication is expected to play an important role in investigation of climate change, monitoring biological, biogeochemical, evolutionary, and ecological processes in sea, ocean, and lake environments, in unmanned underwater vehicles which are used to control and maintain oil production facilities and harbors, submarines, ships, divers and buoys.

Basically there are 3 possible methods for underwater wireless communication.

1. Radio frequency (RF) communication
2. Acoustic communication
3. Visible light communication

Visible light have wave length in the region of 400nm to 700nm which the human eye is capable of seeing. When the light rays are propagating through aqua medium it get affected from attenuation and absorption. Existing underwater VLC systems normally consist of light emitting diodes (LED’s) at the transmitter end and photo diodes at the receiver end. Voltages detected at the receiver are amplified to decode the transmitted data.

In this project we are proposing a method for underwater visible light MIMO communication using,

1. A transmitter made of 100 LEDs
2. A camera as a receiver

Data communication happens from a submerged system (transmitter) to a floating body (receiver). Image processing techniques are used to decode the encoded messages.