{"id":9332,"date":"2011-08-18T20:15:54","date_gmt":"2011-08-19T00:15:54","guid":{"rendered":"http:\/\/rbachnet.wwwmi3-ss40.a2hosted.com\/?p=9332"},"modified":"2021-07-23T16:30:43","modified_gmt":"2021-07-23T20:30:43","slug":"d-light-ful-led-broadband","status":"publish","type":"post","link":"https:\/\/rbach.net\/index.php\/d-light-ful-led-broadband\/","title":{"rendered":"D-Light-ful LED Broadband"},"content":{"rendered":"

\"D-Light-fulTEDGlobal<\/a><\/em> has an intriguing presentation<\/a> by Harald Haas<\/a> who is developing a new type of light bulb that can access the Internet<\/strong> using light<\/strong> instead of radio waves. According to TEDGlobal<\/em>, the professor of engineering at Edinburgh University<\/a>, has been designing modulation techniques that pack more data onto existing networks, but his latest work leaps beyond wires and radio waves to transmit data via an LED bulb<\/a><\/strong>. The new technology will turn LED lights on and off, so fast the change is imperceptible to the human eye to enables broadband data transmission without any noticeable change in room lighting.<\/strong><\/p>\n

The system, which he calls D-Light<\/strong>, and hopes to commercialize under the new VLC<\/a> (Visible Light Communications<\/strong>) brand uses OFDM<\/a> (orthogonal frequency division multiplexing<\/strong>), The article reports the signal can be picked up by simple receivers. As of now, Haas is reporting data rates of up to 10 MBPS (faster than a typical broadband connection), and 100 MBPS by the end of this year and possibly up to 1 GB in the future.<\/p>\n

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Professor Haas says:<\/p>\n

It should be so cheap that it\u2019s everywhere. Using the visible light spectrum<\/a>, which comes for free, you can piggy-back existing wireless services on the back of lighting equipment …As well as revolutionizing internet reception, it would put an end to the potentially harmful electromagnetic pollution<\/a> emitted by wireless internet routers and has raised the prospect of ubiquitous wireless access, transmitted through streetlights.<\/em><\/p>\n

rb-<\/em><\/strong><\/p>\n

\"\"<\/a>So in 2008, Boston University under a National Science Foundation<\/a> grant started this research to piggyback data communications capabilities on low-power LEDs to make an LED light the equivalent of a Wi-Fi access point.<\/em><\/p>\n

Some of the advantages of this technology include: <\/em><\/p>\n