[TenTec] 2.033

[Gary Hoffman]

That's right Duane, that is exactly what you get, highly correlated signal
plus noise in the band pass.  You are right, that is why the other approach
can be in fact better, given that other related factors cooperate as
mentioned by Jerry and others.  There are other approaches too.  But not
just plain narrow band pass.

Regards,

Gary, AA2IZ


----- Original Message ----- 
From: "Duane A Calvin" <ac5aa at juno.com>
To: <tentec at contesting.com>
Sent: Wednesday, May 03, 2006 11:16 PM
Subject: Re: [TenTec] 2.033


> Yes, that is one way to do it, but you get highly correlated signal plus
> whatever noise is on that frequency.  The other approach removes the
> non-correlated noise leaving the signal alone ( or close enough for gov't
> work.)   My DSP theory is not fresh in my memory any more, but the
> discussions here about DSP only being a narrow filter does not map with
> my experience in DSP.  Maybe it's old knowledge, but BW filtering doesn't
> get the entire job done, it seems to me.
>
>         73,  Duane
>
>
>
> On Wed, 03 May 2006 17:29:06 -0400 Sinisa Hristov <shristov at ptt.yu>
> writes:
> > Grant Youngman wrote:
> >
> > > The are many ways to skin the proverbial cat.  Isn't the net
> > effect of
> > > passing highly correlated signals (cross-correlated with a signal
> > of known
> > > frequency or auto-correlated) and rejecting relatively
> > uncorrelated signals
> > > (noise) a very narrow filter centered at the frequency of the
> > highly
> > > correlated signal (or signals).
> >
> >
> > Exactly so.
> >
> >
> > 73,
> >
> > Sinisa  YT1Nt, VE3AE
> > _______________________________________________
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> >
> >
>
>
> --------------------------------------
> Duane Calvin, AC5AA
> Austin, Texas
>
> http://home.austin.rr.com/ac5aa
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>