Terabyte Internet

[Phil]

Seven blue ray movies per second? Pah. I can carry at least ten of them one metre in one second without dropping them. Anyone remember "Sneakernet"?

Phil M1GWZ



On 27 Jun 2012, at 02:15, Robert E. Seastrom wrote:

> 
> "James Wolf" <jbwolf at comcast.net> writes:
> 
>> Can anyone explain the theory behind this?
>> 
>> [[http://gizmodo.com/5921058/scientists-create-wi+fi-that-can-transmit-seven-blu+ray-movies-per-second]]:p>
>> 
>> Jim, KR9U
> 
> I have yet to hear of a modulation scheme that manages to cheat
> Shannon and Nyquist.
> 
> Perhaps that's why the signals only go 1m?  With the bandwidth they're
> talking about needing for each channel (even assuming immodest gains
> attributable to their funky modulation), noise floor and snr have got
> to be a bitch.
> 
> I'd love to hear more, particularly when they manage to make the
> signal go, say, 15 meters in an environment more complex than free
> space in an anechoic chamber...  Perhaps this is an operative lesson
> in developments attributed to "scientists" and "researchers"
> vs. "engineers"?
> 
> I'll defer to those with more cred than me (are you reading this mo?)
> to cut loose with some better snark.
> 
> -r
> 
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