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What is Li-Fi? How does it work?

Home | Uncategorized | What is Li-Fi? How does it work?



August 9, 2017 Uncategorized


Note: English & Arabic Subtitle are available for this video.

This video talks about LiFi, which is an emerging technology for the future. Li-Fi claims to be 100 times faster than standard Wi-Fi. So what exactly is Li-Fi? and How does it work?

Video’s article:

Find out more visit:

References:
Dimitrov, S. and Haas, H. (2015). Principles of LED Light Communications. Cambridge: Cambridge University Press.

Fath, T., Heller, C. and Haas, H. (2013). Optical Wireless Transmitter Employing Discrete Power Level Stepping. Journal of Lightwave Technology, 31(11), pp.1734-1743.

pureLiFi™. (2017). The Home of LiFi – pureLiFi™. [online] Available at: [Accessed 26 Jul. 2017].

Mercer, C. (2017). Li-Fi explained | What is it, how it works & why Wi-Fi might be a thing of the past. [online] Techworld. Available at: [Accessed 26 Jul. 2017].

Anon, (2017). [online] Available at: [Accessed 26 Jul. 2017].

Hill, S. (2017). We’ve seen the light! Li-Fi is the future of wireless connectivity. [online] Digital Trends. Available at: [Accessed 26 Jul. 2017].

Hello and welcome
In this video I am gonna talk about LiFi,

which is an emerging technology for the future.

Li-Fi claims to be 100 times faster than standard
Wi-Fi.

What exactly is it? and How does it work?

What is Li-Fi?

Light Fidelity or Li-Fi is a form of Visible
Light Communications (VLC) system,

which transmit data wirelessly at very high speeds.

Li-Fi uses common LED (light emitting diodes)
light bulbs to transfer data at a speed up to

224 gigabits per second.

The term Li-Fi was first coined by University
of Edinburgh Professor Harald Haas

during a TED Talk in 2011.

Haas envisioned light bulbs that could act
as wireless routers

Subsequently, in 2012 after four years of
research, Haas set up a company called pureLiFi

with the aim ‘to be the world leader in Visible
Light Communications technology’

How does Li-Fi work?

Li-Fi and Wi-Fi are quite similar as both
transmit data electromagnetically.

However, Wi-Fi uses radio waves while Li-Fi
runs on visible light.

Li-Fi use a photo-detector to receive light
signals and a signal processing element

to convert the data into ‘stream-able’ content.

An LED light bulb is a semi-conductor light
source meaning that the constant current of electricity

supplied to an LED light bulb
can be modulated at very high speeds,

without being visible to the human eye.

For example, data is fed into an LED light
bulb with signal processing technology,

it then sends data which is embedded in its beam
at very high speeds to the photo-detector.

The tiny changes in the rapid dimming of LED
bulbs is then converted by the ‘receiver’

into electrical signal.

The signal is then converted back into a binary
data stream that we would recognize as web,

video and audio applications that run on internet
enables devices.

Li-Fi features benefits to the capacity, energy
efficiency, safety and security of a wireless system

with a number of key benefits over
Wi-Fi.

But it’s worth mention that Li-Fi is not
aiming to be a direct replacement for Wi-Fi

and cellular networks, it’s a complementary
technology that will work well in certain situations.

Professor Harald Haas, the person who coined
the term Li-Fi, expect Li-Fi to unlock the third industrial revolution.

The technology seems promising and many major
key players are considering it.

Microsoft is implementing the Lucibel’s
LiFi solution at its innovation center in France.

There have been news reports that Apple is
experimenting with LiFi wireless data for

future iPhones and iPads.

LiFi technology does offer numerous benefits,
but there are still important challenges

that must be overcome before it becomes an essential
part of everyday wireless communications.

Thanks for watching.

Like and share the video if it was informative
for you.

Feel free to share your questions and thoughts
about this topic in the comment section below.

Tags: Li-Filight fidelityvisible light communicationvlc
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