1.1 Background
Visible Light Communication (VLC) is a wireless communication using visible light
as a medium to transfer information. Light is an electromagnetic wave which
frequency spectrum lies between 400 THz to 800 THz or wavelength between 375
nm to 780 nm. LED has longer lifetime, high tolerance to humidity, smaller size and
lower power consumption. Hence it is more environmentally friendly and does not
cause any harm to humans. LED is used for illumination and at the same time, it also
can be used for communication.