60 %
40 %

Published on July 31, 2012

Author: sagineshmk


PowerPoint Presentation: Visible Light communication By SAGINESH M K APPLIED ELECTRONICS MPTC VADAKARA Seminar on Sustainable Energy-Efficient Wireless Application Using Light PowerPoint Presentation: Outline PowerPoint Presentation: Introduction Lighting is a major source of electric energy consumption. Visible light communication is a data communications medium using visible light between 400 THz-800THz. General characteristics: visibility Security Harmless for human body Unregulated Using in restricted area Eye safety PowerPoint Presentation: Motivation Now, researchers came to realize that WLED devices could also be used for wireless purposes. LEDs rends to be considerable cheaper than RF. Optical wireless allows easy bandwidth reuse and improve security. It doesn’t generate RF contaminations. Replacing RF device will reduce interference in RF band. RF radiation in hospital and airplane will be vanished . Large amount of energy can be saved. PowerPoint Presentation: VLC History 1900s Current 405 B.C. 1800s 280 B.C. 1880 ~ Fire Sunlight Lamp LED Heliograph Beacon Fire Pharos Lighthouse Ship-to-ship Comm. Photophone By Bell Traffic Light /Signboard Light 800 B.C. Burning Kite In Battle VLC PowerPoint Presentation: Technology & Modulation Data Light source Modulation (PPM/FSK) Data Demodulation (PPM/FSK) PD or CCD PowerPoint Presentation: Why WLED ? Brightness / Power ratio Cost / Brightness ratio Incandescent Lamp Halogen Lamp Fluorescent Lamp LED LED LED LED 2003 2005 2010 2015 50 100 150 0 1 10 100 PowerPoint Presentation: VLC Characteristic Data rate (bps) 115K 4M 100M 480M 16M 50M UFIR FIR IR VI VLC 1 11 3 Distance (m) 2 6 20 50 UWB 802.11a 802.11b Bluetooth ZigBee PowerPoint Presentation: Transmitter/receiver of VLC Visible light LED Fluorescent lamp PIN photo diode Avalanche photo diode Image sensors PowerPoint Presentation: VLC vs. RF Characteristics Property VLC RF Visibility Yes No Bandwidth Unlimited, 400nm~700nm Regulatory, BW Limited EMI No High Hazard No Yes Power Consumption Relative low Medium Coverage Distance Short Medium PowerPoint Presentation: Advantages Transmit data by sockets of existing light fixtures. Alleviate a number of problems associated with the radio frequency (RF) communication systems. consume far less energy . Security. Harmless for human body. Eye safety. PowerPoint Presentation: Disadvantages Atmospheric absorption Shadowing. Beam dispersion Interference from background light sources PowerPoint Presentation: Applications Under water communication system Flow planning survey system for a store PowerPoint Presentation: Applications (contd) Inside airplane communication Vehicle to vehicle messaging PowerPoint Presentation: Indoor broadcasting system. Applications (contd) PowerPoint Presentation: Conclusion and outlook There are many application that can be realized using Visible Light Communication. Careful consideration will be needed to introduce it into a market. PowerPoint Presentation: Reference Hirohashi , Ikawa , Lin, “High-Speed Full-Duplex Multi-access System for LED Based Wireless Communications Using Visible Light ”, International Symposium on Optical Engineering and Photonic Technology: OEPT 2009, July 2009, Orlando, T. Komine and M. Nakagawa, “Fundamental analysis for visible- lightcommunication system using LED lights,” IEEE Trans. Consumer Electron vol. 50 The Case for Vehicular Visible Light Communication (VLC): Architecture, Services and Experiments By Cen Bi Liu Visible Light Communication Chung Ghiu Lee Chosun University South Korea PowerPoint Presentation: Questions ? PowerPoint Presentation: THANK YOU PowerPoint Presentation: Photophone PowerPoint Presentation: Heliograph PowerPoint Presentation: Image sensors PowerPoint Presentation: Image sensors

Add a comment

Related presentations

Related pages

Visible Light Communications – Wikipedia

Visible Light Communications (VLC) ist eine Datenübertragungstechnologie. Dabei werden Daten oder Informationen mit Hilfe des Übertragungsmediums Licht ...
Read more

Visible light communication - Wikipedia, the free encyclopedia

Visible light communication (VLC) is a data communications medium which uses visible light between 400 and 800 THz (780–375 nm). VLC is a subset of ...
Read more

Visible Light Communications

The 3rd IEEE Workshop on Optical Wireless Communications forms part of IEEE Globecom 2012 in Anaheim California in December. The workshop will be held on 3 ...
Read more

Disney Research » Visible Light Communication

Visible Light Communication Project Members. Stefan Schmid (Disney Research Zurich) Manuela Hitz (Disney Research Zurich) Giorgio Corbellini (Disney ...
Read more

What is Visible Light Communication? | Visible Light ...

There is now a lot of talk about Visible Light Communication (VLC) and indeed this blog site is dedicated to the topic, but what is VLC? On this site when ...
Read more

VLC - Visible Light Communication -

An fast jedem elektronischen Gerät finden sich Status-LEDs - das japanische Visible Light Communications Consortium (VLCC) will diese oder spezielle LED ...
Read more

Visible Light Communication (VLC/Li-Fi) Systems

Visible Light Communication (VLC/Li-Fi) ... As noted by the Visible Light Communications Consortium (VLCC) which was formed in Japan in 2003 ...
Read more

Optical Wireless Communication - Visible Light Communication

Visible Light Communication – High Speed Internet from the Ceiling Lamp
Read more

Visible Light Communication: Disney zaubert mit Licht und ...

Visible Light Communication: Disney zaubert mit Licht und Linux Die Forschungabteilung von Disney in Zürich untersucht die kostengünstige Kommunikation ...
Read more

Visible Light Communication | eldoLED - Light is our ...

Powered by eldoLED driver intelligence, Visible Light Communication (VLC) technology gives retailers the opportunity to capitalize on the increasing number ...
Read more