[time-nuts] LightSquared gets at least some political attention

Magnus Danielson magnus at rubidium.dyndns.org
Sat Apr 16 10:10:50 UTC 2011


On 04/16/2011 06:17 AM, Charles P. Steinmetz wrote:
> Magnus wrote:
>
>> But have you gone SFN? That would compact the frequency needs such
>> that LTE style broadband could be done in UHF instead of breaking up
>> the GPS signal.
>
> See above -- the FCC already intends to repurpose the UHF TV spectrum
> for wireless. I predict that the US will not go for distributed SFN --
> it will instead put several broadcasters' digital streams onto one
> existing transmitter/channel. So (for example), instead of there being
> 10 channels (10 transmitters) used to distribute 10 digital payloads in
> a given market as at present, the same 10 digital payloads (just a wee
> bit more heavily compressed ;-) will be distributed on only 3 channels
> using 3 of the existing transmitters. What now uses 60 MHz of spectrum
> would then use 18 MHz.

Oh... so you haven't done that one yeat.... OK, I see the big mess.

Over here we have DVB-T and DVB-T2 is comming and SFN is common. The 
broadcaster then create muxes with the various streams and it is all 
fairly well planned. At the same time spectrum is being freed for mobile 
networks.

Sounds like this is a more coordinated approach. They did however mess 
up the spectrum for hand mikes... but ah well.

Cheers,
Magnus



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