[opendtv] Re: (No Date: Tue, 28 Sep 2004 10:30:37 -0400

From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
To: "OpenDTV (E-mail)" <opendtv@xxxxxxxxxxxxx>
Date: Mon, 18 Oct 2004 10:39:20 -0400

Mark Aitken wrote:

> ATSC receivers are certainly dependent on the
> equalization  capability of chips...but DO NOT
> lose sight of the OTHER issues. As I put it in
> my IEEE Broadcast Symposium presentation last
> Friday, this is like "whackamole"...once you punch
> down the equalization issues, the next mole pops
> up, TUNER RELATED! SPECTRUM RELATED! Where are the
> required guarantees that that 5th GEN chipsets
> solve all the issues? In a well designed receiver,
> perhaps most issues are resolved. Put some cheap,
> ill-performing S.S. (or other) RF front-end in and
> do you still think performance is dictated by a
> well performing equalizer?

Well, granted, Mark. But the really tough nut for
ATSC receivers has been compensating for multipath
distortion, static and dynamic. The other points,
immunity to impulse noise, adjacent channel
rejection, UHF tabboos, power density limits, were
not where 8-VSB was behind COFDM. In fact, 8-VSB was
better than COFDM in some of these other parameters
needed for good reception.

> We need to stop using terms interchangeably that
> do nothing to address the nature of the many
> problems a "proper" ATSC receiver needs to 'deal'
> with...!
>
> Look at the scope of the papers...
>
><http://www.ieee.org/organizations/society/bt/symp/fullprogram.html#FPM>=


I noted the one about mobile reception of 8-VSB
with diversity receiving antennas. Did you get to
see the results on that?

Bert
 
 
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[opendtv] Re: (No Date: Tue, 28 Sep 2004 10:30:37 -0400

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