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7elmy
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re: Visible light illuminates a new approach for wireless comms
7elmy   9/22/2011 10:56:42 PM
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It's a great idea but how could i modulate LED to carry information ??

Robotics Developer
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re: Visible light illuminates a new approach for wireless comms
Robotics Developer   8/30/2010 9:46:59 PM
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An interesting idea but I wonder about implementation practicability? Having used "light beam communicators/controllers" (aka TV remote controls and LED based line of sight setups) I wonder how the system will deal with the normal loss of signal say when someone walks in front of you. Also, using it outside would be great on those clear nice days, but snow, rain, sleet, fog, etc would render this non-operational (well maybe not for IR..). It seems like a fun idea but I question whether it can really make a visible impact on personal devices/car communications. A good read though, it brought back memories, thanks!

Luis Sanchez
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re: Visible light illuminates a new approach for wireless comms
Luis Sanchez   8/30/2010 8:58:35 PM
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Quite an interesting article! I never thought about this. Though it appears the applications are a little limited since they have to respect the interaction between the human eyes and environment and the data being transmitted. Nevertheless it sounds like a real smart turn to illumination since we would be using one device for two purposes.

dirk.bruere
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re: Visible light illuminates a new approach for wireless comms
dirk.bruere   6/7/2010 6:58:36 PM
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Wow! What a good idea. At least, that's what I thought when I read about it 25 years ago.



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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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