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LI-FI TECHNOLOGY
PRESENTED BY D.B.N.R.S.SESHA SAI
(ESWAR) Sk.Baji
WHAT IS LI – FI ?
• LI-FI is transmission of data through illumination, sending data through a LED light bulb that varies in intensity faster than human eye can follow.
INTRODUCTION TO LI-FI
• THE PURPOSE BEHIND COMING UP WITH THE IDEA OF LI-FI IS TO ALLOW THE EXCHANGE OF DATA BETWEEN SEVERAL DEVICES AT HIGHER SPEED.
• LI-FI IS A TERM SOME HAVE USED TO LABEL THE FAST AND CHEAP WIRELESS COMMUNICATION SYSTEM, WHICH IS THE OPTICAL VERSION OF WI-FI.
• LI-FI IS BASED ON VISIBLE LIGHT COMMUNICATION (VLC) TECHNOLOGY.
WHY ONLY VLC?
Radio Waves
Infrared Rays
Visible Rays
Ultraviolet Rays X- Rays
Gama Rays
PRESENT SCENARIO
1.4 Million 5 Billion
WORKING PROCESS
TECHNOLOGIES USED IN LI-FI:
SIM-OFDM and Spatial modulation
ADVANTAGES
DISADVANTAGE
•PRESENCE OF LIGHT IS ESSENTIAL
DIFFERENCE BETWEEN THE TECHNOLOGIES
1. HOSPITALS(IN FEW MEDICAL INSTRUMENTS)
APPLICATIONS
2. IN AIRCRAFT CABINS
3. IN RF RESTRICTED ENVIRONMENTS
4. IN VEHICLES AND TRAFFIC LIGHTS, REDUCING ACCIDENTS AND TRAFFIC
CONGESTION
5. STREET LAMPS(AS FREE ACCESS POINTS)
6. UNDER WATER
CONCUSSION
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 a Wi-Fi hotspot to transmit wireless data and we will proceed toward the cleaner, greener, safer and brighter future.
ANY QUERIES……..
THANK YOU