This is a presentation about visual light communication.Though this project is done by a group of students this presentation is prepared by me with help of all of the nmes mentioned in the presentation. In this ppt you will find reliable information about Light Fidelity or Visual Light Communications and how it works and it's applications.
Thank You.
2. DR B C ROY ENGINEERING COLLEGE , DURGAPUR
PRESENTATION ON
VISUAL LIGHT
COMMUNICATION
PRESENTED BY-
ABINASH GUPTA ( ROLL NO-12000315002)
AKASH KUMAR ( ROLL NO-12000315004)
AKASH PATHAK ( ROLL NO-12000315005)
AKSHAY KANT ( ROLL NO-12000315006)
ARNAB DUTTA ( ROLL NO-12000315021)
ASHIS PANDEY ( ROLL NO-12000315023)
AYUSH KUMAR JHA ( ROLL NO-12000315027)
BCREC/HU-481/ECE 1-X
3. PRESENTATION OUTLINE
INTRODUCTION
OBJECTIVES
HISTORY
LIFI CONSTRUCTION
WORKING OF LIFI
OVERCOMING WIFI ISSUES
MODULATION TECHNIQUES
ADVANTAGES
IMPACT OF IOT DEVICES
LIFI ROUTER
APPLICATIONS
FUTURE INTEREST
CONCLUSIONS
BCREC/HU-481/ECE 1-X
4. INTRODUCTION
Li-Fi means Light Fidelity
Li-Fi is fast and cheap optical version of Wi-Fi
Li-Fi is based on Visible Light Communication
Li-Fi is a technology that uses Light emitting Diodes
to transfer data wirelessly
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5. OBJECTIVE
The main objective of this presentation is to provide an efficient, low cost, secure,
digitally controlled and fast data transfer technique which can be used as an alternative
for conventional data transfer technique Wi-Fi
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BCREC/HU-481/ECE 1-X
6. HISTORY
D
Professor Harald Haas, from the University Of
Edinburgh is widely recognized as the founder of Li-Fi
The D-Light project at Edinburgh’s institute was
funded from January 2010 to January 2012
Research has been going in Korea, Russia and other
developing countries from 1990’s
D
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7. LI-FI CONSTRUCTION
HThe Li-Fi product consists of 4 primary sub assemblies
Bulb
RF power amplifier circuit(PA)
Printed circuit board(PCB)
Enclosure
D
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8. WORKING OF LIFI
D
Data is fed into an led light bulb which is fitted
with signal processing technology
The led bulb pulses the data at a high non-visible
rate to the photo detector
The pulses are interpreted by the receiver into an
electrical signal, the binary data is actually the
electronic signal which is the web content we
consume
D
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9. OVERCOMING WIFI ISSUES
Li-Fi transmits data with the help of Led bulbs while Wi-Fi uses radio waves with wifi router. The followings are
the incapabilities of Wi-Fi overcome by Li-Fi-
Interference
Merits
Data Transfer Speed
Frequency of Operation
Security
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10. MODULATION TECHNIQUES
Single Carrier Modulation techniques are straightforward to
be used in Li-Fi, however, Computationally Complex
Equalization Process are required in frequency selective Li-Fi
channels
OFDM is based on Fast Fourier Transformation for which
every Computational effective Digital Signal Processing
implementations exists
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12. LIFI ROUTER
Serves as connector to external link DSL
Covers a radius of about 20 meters
The transmission speed is <100 MBPS
Suitable for small office or home use
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13. APPLICATIONS
Li-Fi can be used in
Connectivity
Sensitive data
Indoor Navigation
Underwater applications
Safety Environment
And many more
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14. FUTURE INTEREST
The concept of Li-Fi is currently attracting a great deal of interest
Efficient alternative to radio based wireless
Quick and reliable
Air waves are clogged so let’s use light waves
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15. CONCLUSION
The possibilities are numerous and can be explored further
If this technology can be put into practical use every bulb can be used something like Wi-Fi
hotspot
We will proceed towards the cleaner, greener and brighter future
This may solve issues such as the shortage of Radio-Frequency bandwidth
Allows internet where traditional radio based wireless isn’t allowed
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