International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 02 | Feb -2017
p-ISSN: 2395-0072
www.irjet.net
DATA TRANSMISSION THROUGH LI-FI Prof. Prajakta Jadhav1, Shazia Khatib2, Kaisahemd Maner3 1Assistant
Professor & TC, Dr.D.Y.Patil Institute of Engg. Management and Research, Pune, Maharshtra, India E&TC, Dr.D.Y.Patil Institute of Engg. Management and Research, Pune Maharshtra, India 3 Student, E&TC, Dr.D.Y.Patil Institute of Engg. Management and Research, Pune Maharshtra, India 2Student,
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Abstract – The following paper clarifies the use of visible
light spectrum for data communication. In particular, it will show how Li-Fi enhances VLC by using light emitting diodes (LEDs) to implement fully networked wireless system. Li-Fi can be a new contribution in one of the efficient wireless data transmission systems. Due to its excellent speed feature it holds a great scope in future application. Using the concept of Li-Fi we are implementing a module wherein a buggy is being drove based on commands sent through LED light. Key Words: VLC (visible light communication), LED (light emitting diodes, Li-Fi(Light fidelity),Wi-Fi(wireless Fidelity).
This can now be defined as visible light communication. For this just the provision of transreciever is need to be done which is not at all a difficult part. Thus we can see the light but not the data. This gives us an idea of what VLC specifies or is meant.
1. INTRODUCTION Due to the escalating use of wireless data communication, the present radio spectrum below 10 GHz (cm-wave communication) is g e t t i n g s a t u r a t e d . Researchers in wireless technology have responded to this problem by considering the u p p e r l a y e r o f t h e s p e c t r u m i . e . t h e V L C s p e c t r u m . Li-Fi is a newly emerged wireless technology that has the scope of providing efficient and best connectivity within indoor network environment. The prior essence of this technology is that it enables us to send the information with the help of light illumination. At the University of Edinburgh in an ongoing conference, Prof. Harald Hass showed how vlc can be used for data communication. He demonstrated this by sending a HD video within just a few seconds with the help of light illumination .The term Li-Fi was thus coined by him i.e. light fidelity. He foresees a future where a normal led bulb in a room could be used for data communication for devices like mobile phones, laptops, computers etc. Additional boon to this technology is security as light cannot be seen therefore data cannot be accessed.
1.1 VLC (Visible Light Communication): That part of the VLC spectrum which is visible to the human eye is the visible light spectrum.The visible light is the electromagnetic radiation in this range of wavelengths. The band width of this spectrum corresponds to 430-770 THz Imagine that how a flash light can be used to send the mores code. If the flash light is made on and off very quickly according to the binary data of user requirement we get a system wherein there is communication plus illumination. Š 2017, IRJET
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Fig -1: Visible Light Communication.
1.2 objective: The main objective is to make data transmission through light with the help of LI-FI . In this system there two are modules one of which is sender and other is receiver. At the sender side a circuit modulates light current and illuminates the LEDs according to the data we wish to transmit. At the receiver side there is a decoder circuit which actually consists of an octo-coupler. Initially it will sense the flicker in light and give information to the controller so that controller can drive dc motor according to the data received.
2. Analogy Table below shows the the parameter of Li-FI analogues to Wi-Fi. It highlights the key features of Li-Fi.
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