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Home > Press > Leti to Demonstrate Wireless High Data Rate Li-Fi Prototype at Light + Building 2014 in Frankfurt

Abstract:
CEA-Leti will demonstrate its new prototype for wireless high data rate Li-Fi (light fidelity) transmission at Light + Building 2014 in Frankfurt, Germany, March 30-April 4. The technology employs the high-frequency modulation capabilities of light-emitting diode (LED) engines used in commercial lighting. It achieves throughputs of up to 10Mb/s at a range of three meters, suitable for HD video streaming or Internet browsing, using light power of less than 1,000 lumens and with direct or even indirect lighting.

Leti to Demonstrate Wireless High Data Rate Li-Fi Prototype at Light + Building 2014 in Frankfurt

Grenoble, France | Posted on March 29th, 2014

With this first proof of concept and its expertise in RF communications, Leti forecasts data transmission rates in excess of 100Mb/s with traditional lighting based on LED lamps using this technology approach and without altering the high-performance lighting characteristics.

Visible light communications (VLC), or Li-Fi, have gained significant momentum in recent years, primarily because of expectations that LEDs will become predominant in the lighting market. Indeed, as part of its Ecodesign process, the European Union established a schedule for LED lighting penetration (regulation No. 1194/2012). Halogen lamps will be phased out and replaced by LED lighting by Sept. 1, 2016, in 30 European countries.

Moreover, because LEDs can be modulated at very high frequencies and their oscillations are invisible to humans, they permit information transmission at very high data rates.

Other technical and market factors also are increasing interest in data transmission through lighting. These include crowding of the conventional radiofrequency (RF) spectrum, the mobile data-traffic explosion in cellular networks, and the need for wireless data transmission without electromagnetic field (EMF) interference.

The demonstration is part of a Leti project begun in 2013 to achieve a high data rate Li-Fi prototype by applying Leti's expertise in digital communications, hardware prototyping and solid-state lighting.

The optical system consists of an A19 lamp based on LEDs at the transmitter and an avalanche photodiode at the receiver. The digital communication component is implemented on a proprietary and reconfigurable platform that carries out a flexible multi-carrier modulation.

Leti, which is demonstrating the Li-Fi capability to show a promising alternative to conventional RF wireless communications, is also focusing on component optimization to offer a bidirectional link.

The prototype was demonstrated at Forum LED Europe in Paris in 2013 and at CES in Las Vegas earlier this year.

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About CEA-Leti
By creating innovation and transferring it to industry, Leti is the bridge between basic research and production of micro- and nanotechnologies that improve the lives of people around the world. Backed by its portfolio of 2,200 patents, Leti partners with large industrials, SMEs and startups to tailor advanced solutions that strengthen their competitive positions. It has launched more than 50 startups. Its 8,000m˛ of new-generation cleanroom space feature 200mm and 300mm wafer processing of micro and nano solutions for applications ranging from space to smart devices. Leti’s staff of more than 1,700 includes 200 assignees from partner companies. Leti is based in Grenoble, France, and has offices in Silicon Valley, Calif., and Tokyo.

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Contacts:
CEA-Leti
+33 4 38 78 02 26


Agency
+33 6 64 52 81 10

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