SDR News - SlashdotReview

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Andy McCaskey

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A Daily (M-F) ten-minute summary of Tech News Highlights. SDRNews from Slashdot, Digg and Reddit.

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SDRNews: Digital Signaling in Visible Spectrum

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  • Digg Promotes Cassandra
  • Apple Testing RFID for iPhone ?
  • Why MySQL Must Go

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    • Digg Promotes Cassandra
    • Apple Testing RFID for iPhone ?
    • Why MySQL Must Go

    SDR News is a Daily (M-F) Technology Podcast with Tech News Highlights from Slashdot, Digg and Reddit

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    LED Datalinks

    by Andrew McCaskey
    Flooding the the room with light and data at the same time has a lot going for it – and that’s the promise of some new work that is being done at MIT.

    LED’s are the only visible light source that can be keyed on and off rapidly enough to handle data at rates approaching 250Mb/sec. – and with spectral filtering, those sorts of speeds have been reached during trials.

    From the articles, it looks like this is still a simple on-off keying at extremely rapid rates. It’s going to get really interesting when more sophisticated signalling gets incorporated, with the equivalent of frequency shift keying between light frequencies , resulting in a mix of colors that our eyes would interpret as white light, but would in fact be a spread spectrum signalling scheme.

    Now that would be a real way to send a message to oncoming cars.

    Although visual short range digital signalling to other drivers has already been perfected. Probably for the past hundred years or so.

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    Last 5 Posts

    SDRNews: HP Roadshow Report

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    LED Light Hi-Speed Data Transfer

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    SDR News is a Daily (M-F) Technology Podcast with Tech News Highlights from Slashdot, Digg and Reddit

    Click Here to Sign Up for the SDR Newsletter



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    Guest Book

    From: Todd Cochrane – September 13,2007 at 3:34 am

    You have had some great shows lately Andy!!