[opendtv] Re: IEEE Ericsson article on use of LTE for TV

  • From: "Albert Manfredi" <bert22306@xxxxxxxxxxx>
  • To: <opendtv@xxxxxxxxxxxxx>
  • Date: Sat, 16 Jun 2012 19:28:28 -0400

"We have ALREADY agreed that this TV-related LTE network sill be 2-way, yes? So we have ALREADY agreed that the 84 MHz requirement of the IEEE article was bogus (it would be that for just one cell)." 


Okay, this might require clarification.
IF the TV LTE network is supposed to be capable of broadcasting all TV channels in a market, AND it also has to be a 2-way cell network, THEN each cell's channel will have to be 84 MHz wide (by their numbers) AND adjacent cells cannot reuse the same frequencies. IOW, this ain't just another SFN. It's a cellular network.,
And this 84 MHz channel is certainly in line with expected 4G channel widths, so this should not be surprising.
Furthermore, IF you want to build a less dense net with taller towers to cover the exurbs, THEN those exurbs cells cannot be allowed to interfere with multiple cells closer in, which they would do if they use the same frequency plan as the dense network.. Which means, more frequencies required.
So now you have to rethink the whole tradeoff between true broadcast as opposed to unicast, given that you have a 2-way infrastructure. And all the facile claims about how LTE beats big stick broadcasting in terms of spectral efficiency. 

Bert



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