[opendtv] Re: DTT tuner design (was Re: Demand for free DTV rising in Australia)
- From: "Allen Le Roy Limberg" <allimberg@xxxxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Tue, 3 Jul 2007 21:30:50 -0400
Front-end problems are the same for both types of modulation.
The differences between COFDM and 8VSB have to do with overcoming multipath
with channel equalization, which takes place later in the receiver. Channel
equalization may be done just before demodulation or just after. The ATI
designs do both.
Al
----- Original Message -----
From: "John Shutt" <shuttj@xxxxxxxxx>
To: <opendtv@xxxxxxxxxxxxx>
Sent: Tuesday, July 03, 2007 8:23 AM
Subject: [opendtv] Re: DTT tuner design (was Re: Demand for free DTV rising
in Australia)
>
> ----- Original Message -----
> From: "Albert Manfredi" <bert22306@xxxxxxxxxxx>
>
> Bert,
>
> Your statement below assumes that reception among existing COFDM and 8-VSB
> receivers are equally poor. That is an assumption that I cannot agree to.
> I think the "Cold Fusion" LG STB has proven that 8-VSB is more sensitive
to
> tuner design than COFDM.
>
> John
>
> > I hope this exchange between Frank and Stephen is enough to explain why
a
> > simple switch to COFDM won't fix a thing in the US DTT market.
> >
> > This is why it's imperative to know what the problem is, rather than
> > jumping to facile conclusions.
> >
> > Bert
>
>
>
>
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