Li-Fi stands for Light-Fidelity. Li-Fi is
transmission of data using visible light by sending data through
an LED light bulb that varies in intensity faster than the human
eye can follow. If the LED is on, the photo detector registers a
binary one; otherwise it’s a binary zero. This paper deals with
the implementation of the most basic Li-Fi based system to
transfer data from one computer to another. The main
components of this communication system are high brightness
LED which acts as a communication source and silicon
photodiode serving as the receiving element. The data from the
sender is converted into intermediate data representation, i.e.
byte format and is then converted into light signals which are
then emitted by the transmitter. The light signal is received by
the photodiode at the receiver side. The reverse process takes
place at the destination computer to retrieve the data back from
the received light.
Published In : IJCAT Journal Volume 1, Issue 9
Date of Publication : 31 October 2014
Pages : 437 - 443
Figures :12
Tables : --
Publication Link : Implementation of A Simple Li-Fi Based System
Rahul R. Sharma : Department of Computer Engineering, Fr. CRIT,
Vashi, Navi Mumbai, India
Akshay Sanganal : Department of Computer Engineering, Fr. CRIT,
Vashi, Navi Mumbai, India
Sandhya Pati : Department of Computer Engineering, Fr. CRIT,
Vashi, Navi Mumbai, India
Li-Fi
High-Brightness LED
Photodiode
Byte
Format Wireless Communication
The concept of Li-Fi is attracting a great deal of interest
because it may offer a genuine and very efficient
alternative to radio-based wireless technology. If this
technology is put into practical use, every bulb can be
used like a Wi-Fi hotspot to transmit wireless data and
the world will proceed towards a cleaner, greener, safer
and brighter future. In future one can use micro LEDs
for data transmission which flickers at a much higher
rate than ordinary LEDs and in turn provides higher
speed. A cluster of LEDs can be used for parallel data
transmission. LEDs of different colors such as red, green
and blue can be used to enhance the transmission rate.
[1] Rahul R. Sharma, Raunak, Akshay Sanganal, “Li-Fi
Technology - Transmission of data through light”
IJCTA Vol 5 (1),150-154.
[2] http://visiblelightcomm.com/an-ieee-standard-forvisible-
light-communications/
[3] http://visiblelightcomm.com/an-ieee-standard-forvisible-
light-communications/manchestercoding/
[4] http://visiblelightcomm.com/an-ieee-standard-forvisible-
light-communications/vppm/
[5] http://visiblelightcomm.com/an-ieee-standard-forvisible-
light-communications/xy-chromaticity/
[6] http://edition.cnn.com/2012/09/28/tech/lifi-haasinnovation
[7] http://articles.economictimes.indiatimes.com/2013-
01-14/news/36331676_1_data-transmission-trafficsignals-
visible-light-spectrum
[8] http://www.telegraphindia.com/pressrelease/prnw/en
uk201304301306_public.html
