Li-Fi: An Infallible Standard For Future Indoor Communication.

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Li-Fi: An Infallible Standard for Future Indoor Communication

Abrar I. Soudgar
Rahul V. Nimse,
Walchand College of Engineering, Opp. Willingdon P.O,Vsihrambagh,
Sangli,Maharashtra India.

Prof. A. R. Surve,
Assisstant Professor Walchand Collge of Engineering, Sangli Abstract
Li-Fi or Light Fidelity is a concept more often considered related to Wi-Fi which is Wireless Fidelity, but is far more dissimilar right from the core concept. Li-Fi as opposed to Radio waves in Wi-Fi uses Visible Light for bringing about the communication between two devices. This paper throws light on how Light (VLC) is a feasible solution to the existing problems of radio waves
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He is a German Professor of ‘Mobile Communication’ at University of Edinburgh, Scotland. He explained that in future a new standard of communication is required for wireless communication as current and most widely used standard Wi-Fi has some inescapable disadvantages. The term Li-Fi was also coined by him and is capable of overcoming some major bottlenecks of Wi-Fi like radio interference, bandwidth, security etc.
The term Li-Fi stands for Light Fidelity and it uses Visible Light as a medium for transferring data through Light Emitting Diodes (LED). How do we do this? We vary intensity of the LED in order to represent a zero or a one. The LED in OFF state is a zero and in ON state is a one, we do this at such a high frequency so that the switching of the LED is not visible to the human eye. So the person looking at the bulb won’t even recognize that it is transmitting data. So, the LED would serve two purposes simultaneously, transmitting data and illumination. A small gadget like an LED has made this technology possible and there aren’t enough words describing the advantages of LEDs. LEDs are current-driven devices in which the light output depends directly on the forward current passing through them. LEDs can be switched ON/OFF faster than any other light source, and have extremely short rise times, in the range of 10 to 100ns .The white light is produced by the combination of the blue photons emitted
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