[opendtv] Re: Multi-band TV receiver and DVB-H
- From: "John Shutt" <shuttj@xxxxxxxxx>
- To: "OpenDTV" <opendtv@xxxxxxxxxxxxx>
- Date: Thu, 27 May 2004 17:49:36 -0400
----- Original Message -----
From: "Doug McDonald" <dtvmcdonald@xxxxxxxxx>
> No. What I'm saying is that you can make a system
> that does not have to follow the dynamic multipath
> the whole time, only for as long after a training
> sequence as necessary to read the "robust"
> portion of the signal.
Well, since the target receiver is a hand held device, i.e. a cell phone
with a color screen, I would be willing to wager that unless the user sets
the phone down on a table that there will be much more dynamic multipath
than you give credit for. But perhaps if the data packets for the hand held
device immediately
followed the training sequence, then maybe the receiver could lock on to the
data stream and maintain convergence long enough to recover the packets of
interest.
I wonder how long that could be, and given the relatively long interval
between training signals in ATSC, what the practical throughput would be,
especially if E-VSB is used to further enhance robustness.
John Shutt
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