[opendtv] Re: 20060616 Free Friday Fragments (Mark's Monday Memo)
- From: "John Shutt" <shuttj@xxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Mon, 19 Jun 2006 14:16:24 -0400
Bert,
The pseudo-training sequences created by A-VSB do not contain payload. The
amount of payload lost by the Samsung/Rhode-Schwarz A-VSB method is more
than the data 'loss' Sinclair used for DVB-T compared to ATSC during their
1999 Baltimore tests. Therefore, given the performance of those 1999
vintage DVB-T receivers compared to today's diversity DVB-T receivers,
"almost as good" both in terms of spectral efficiency and C/N margins (under
heavy multipath) is all you can ever hope for.
John.
----- Original Message -----
From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
To: <opendtv@xxxxxxxxxxxxx>
Sent: Friday, June 16, 2006 5:53 PM
Subject: [opendtv] Re: 20060616 Free Friday Fragments (Mark's Monday Memo)
> Obviously, John, none of this would be the least bit exciting if the end
> result were not better than COFDM. The whole point of the exercise is to
> be able to operate in severe multipath, even dynamic multipath, with
> higher spectral efficiency and a lower C/N margin than alternatives.
>
> It wouldn't be nearly as much fun if all I was hoping for was "almost as
> good as."
>
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