[opendtv] Re: FCC spectrum crunch forecast
- From: Craig Birkmaier <craig@xxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Fri, 22 Oct 2010 08:20:04 -0400
At 8:12 PM -0500 10/21/10, Manfredi, Albert E wrote:
http://www.fcc.gov/Daily_Releases/Daily_Business/2010/db1021/DOC-302324A1.pdf
Just glanced through this report. One thing that jumped out:
Page 14, Exhibit 9:
The spectral efficiency of digital cellular is stated to be:
2G 0.03 b/s/Hz
2.5G 0.09
3G initial 0.24
3G HSDPA 0.48
3G HSPA 6 0.72
3G HSPA 7 1.29
4G 1.5
TV broadcasters could brag about their 3.3?
We've been through this before Bert. It's not just spectral
efficiency; it also is related to the ability to provide wireless
services in locations where higher frequency radios do not work well
- like penetrating buildings.
And while the spectral efficiency of an ATSC channel may be 3.3, you
also need to take into consideration the adjacent channels that
cannot be used to protect the channel in use.
Regards
Craig
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