[opendtv] Re: Accurian DTV STB from Radio Shack
- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Mon, 10 Oct 2005 20:56:10 -0400
Bob Miller wrote:
> Without doing the research, I think that XM
> and Sirius have about 4 MBps total capacity
> and fit 100 + radio channels in that.
I couldn't quickly find XM Radio or Sirius Radio
frequency allocations. But the original satellite
radio system, WorldSpace, transmits 50 channels
of 128 Kb/s audio in the 1,467 to 1,492 MHz
segment of the L-Band.
So,
50 * 128 is 6.4 Mb/s total
6.4 / 25 is 0.256 b/s/Hz.
I'm pretty sure terrestrial digital radio could
get by with more like 1 b/s/Hz.
Bert
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