lifi technology
DESCRIPTION
upcoming technologyTRANSCRIPT
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(Light Fidelity)
PRESENTED BY MANISHA KUMARI (13697) NEHA SINGH (13713)
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Introduction Issues regarding RADIO
WAVES Why VLC ?Components Block diagram Working Application sAdvantagesLimitation o ConclusionReferences'
CONTENT
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INTRODUCTION
What is exactly ?
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Harald Haas in TED Global Talk
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If led is on , then we transmit a digital signal 1,
and if the led is off , then we transmit a digital signal 0.
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Capacity
security
EfficiencyAVAILABILITY
ISSUES REGARDING RADIO WAVES
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WHY VLC ??
RADIO WAVE
INFRA RED
VISIBLE LIGHT
UV-RAYS
X–RAYS
GAMA RAYS
Expensive , Limited & Less Secure
It is not used generally
used in hospitals
Harmful for human body
IIt is not used due to eye safety regulation
It is not harmful for human beings & available every where easily
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COMPONENTS OF LI-FI LI FI consist of 4 elements : 1) bulb 2)RF power Amplifier (PA) 3)Printed circuit board(PCB) 4)Enclosure
TRANSMITTING ELEMENT
RECEVING ELEMENT
Avalanche Photo Diode
Image Sensors
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BLOCK DIAGRAM
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DATA
MODULATION
LIGHT
SOURCE
Data Demodulation(PPM/FSK)
Photo
Detector
BLOCK DIAGRAM
TRANSMITTI
NG SIGNAL
RECEVING SIGNALS
PROPAGATE
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Potential Application Area
IN AIRCRAFT CABIN
IN PETROCHEMICAL INDUSTRIES
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IN HOSPITALS NNIII
IN TRAFFIC
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UNDER WATER
In home , offices & schools
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ADVANTAGES::
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DISADVANTAGELight can not pass through opaque objects
Interference from external source like sun light, normal bulbs opaque materialsHigh installation cost of VLC
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CONCLUSION
“WITH ITS MAGIC OF LIGHT IT CAN MAKE OUR WORLD A GREENER ,SAFER CLEANER AND MOREOVER A BRIGHTER PLACE TO LIVE.”
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REFERENCESS :
http://www.slideshare.net/tanshu9871/ppt-on-lifi-technology?related=2 Harald Haas,‘Wireless data from every light bulb’, TED Global, Edinburgh, July 2011http://www.oledcomm.comhttp://purelifi.comhttp://www.lificonsortium.org
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THANK
YOU
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