[san-tech][03356] 白色LEDで 100Mbpsデータ転送 (100Mbps by white-light LEDs)

Date: Thu, 25 Aug 2011 14:17:15 +0900
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EUのプロジェクトで白色 LED可視光を利用して 100Mbpsのデータ転送に

成功しました：

"Data are traveling by light"

 Research News August 2011

 Fraunhofer Institute for Digital Media Technology IDMT

  http://www.fraunhofer.de/en/press/research-news/2010-2011/20/data-traveling.jsp

  "Regular LEDs can be turned into optical WLAN with only a few

   additional components thanks to visible light communication

   (in short, VLC). The lights are then not just lighting up, they

   also transfer data. They send films in HD quality to your iPhone

   or laptop, with no loss in quality, quickly and safely."

.....

  "... since scientists from the Fraunhofer Institute for

   Telecommunications, Heinrich Hertz Institute HHI in Berlin,

   Germany, have developed a new transfer technology for video data

   within the scope of the OMEGA project of the EU, its

   implementation in real life is getting markedly closer. At the

   end of May, the scientists were able to present the results of

   the project in Rennes, France. They were able to transfer data

   at a rate of 100 megabits per second (Mbit/s) without any losses,

   using LEDs in the ceiling that light up more than ten square

   meters (90 square feet). The receiver can be placed anywhere

   within this radius, which is currently the maximum range.

"In the future data will be transferred to laptops with the help of LEDs"

  http://www.fraunhofer.de/en/Images/md08_fo2g_datentransfer_tcm63-94452.jpg

  ""For VLC the sources of light - in this case, white-light LEDs -

   provide lighting for the room at the same time they transfer

   information. With the aid of a special component, the modulator,

   we turn the LEDs off and on in very rapid succession and transfer

   the information as ones and zeros. The modulation of the light is

   imperceptible to the human eye. A simple photo diode on the laptop

   acts as a receiver.""

 Klaus-Dieter Langer, the team of project manager, HHI

.....

  "The new transmission technology is suitable for hospitals,

   for example, because radio transmissions are not allowed there."

.....

  "Currently the scientists are developing their systems toward

   higher bit rates. "Using red-blue-green-white light LEDs, we were

   able to transmit 800 Mbit/s in the lab," said Klaus-Dieter Langer."

OMEGA Project

  http://www.ict-omega.eu/