[opendtv] Re: SFN response to Craig's post

Nat Ostroff wrote:


One point that needs to be kept in mind is that any Broadcaster
mobile or portable service needs to, as closely as possible,
replicate the service offered by the Cell Phone boys if the
Broadcaster service is not to be viewed as a secondary service.
That means SFN type gap fillers for inside structures and
shadowed areas. Simple, low cost, SFN is a very important
feature of any sucessful Broadcaster portable service.


No argument there. But gap fillers, or OCRs, are a somewhat different beast.
IMO, the best practical solution is the big stick, for the bulk of coverage, assisted by small OCRs. This is also the safest way to achieve wide coverage without introducing interference deliberately. Because the OCR signal is supposed to be swamped by the big stick signal as you move away from the OCR. And you only install the OCRs where they are needed, rather than being forced to cover the entire market area with them.
MediaFLO doesn't have that option. They are constrained to cover areas larger than one TV market on one frequency channel. If this coverage has to be continuous, and robust where they want coverage, the SFN is the only terrestrial answer. But they pay to make that work. 

Bert

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