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PA2AGA > TCPDIG 28.09.96 05:37l 179 Lines 5875 Bytes #-10872 (0) @ EU
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Date: Thu, 26 Sep 96 18:27:50 MET
Message-Id: <tcp_96_202>
From: pa2aga
To: tcp_broadcast@pa2aga-10
Subject: TCP-Group Digest 96/202
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TCP-Group Digest Thu, 26 Sep 96 Volume 96 : Issue 202
Today's Topics:
higher speeds, coding etc.. (4 msgs)
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We trust that readers are intelligent enough to realize that all text
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----------------------------------------------------------------------
Date: Tue, 24 Sep 1996 21:25:16 +0000
From: "Anthony Godshall" <togo@of.net>
Subject: higher speeds, coding etc..
dayj@ozemail.com.au (John Day) 17 Sep 96
> >and 13cm would seem far more promising. Keep away from GMSK with all its
> >attendant complications and go for a simple scheme which needs only simple
> >radio equipment.
Phil Karn's 17 Sep 96 . . .
> There's a limit to how simple the scheme can be and still work. In
> particular, spread spectrum is fairly complex, but it also works a lot
> better. So some complexity is beneficial, especially if it can be
> relegated to software or to VLSI hardware as opposed to RF hardware.
Albert Einstein said ...
"Everything should be made as simple as possible, but no simpler"
Best regards.
Tony
------------------------------
Date: Wed, 25 Sep 1996 08:21:23 -0500
From: "Steven R. Sampson" <ssampson@othello.tinker.af.mil>
Subject: higher speeds, coding etc..
Anthony Godshall wrote:
>
> Albert Einstein said ...
>
> "Everything should be made as simple as possible, but no simpler"
That works in economics as well. If you charge everything and never
pay it back it's called "The economy is better under my Administration."
Even better is: "I'll give you 15% of your money back."
What money? You spent it in 1968...
By channelizing the spectrum and handing out permits (a finite
quantity), you keep it very simple. Einstein would be proud of the
achievements in FM and SSB radio in channelizing the spectrum.
When you channelize you simplify the equipment.
Is there another way to simplify? Yes. How simple is: just use the
whole band. There is nothing simpler than that. Einstein would be
proud. Is the equipment simple? Who cares. We don't know if
Einstein would favor simple equipment over simple theory. If he saw
how many organizations it took to hand out channel permits, I'm sure
he'd favor spread spectrum. By channel permits I'm mostly thinking
of the FCC and Frequency Coordinators, etc.
Steve
"4 Trillion is a simple number"
------------------------------
Date: Wed, 25 Sep 96 22:09:26 GMT
From: johnday@oznet02.ozemail.com.au (John Day)
Subject: higher speeds, coding etc..
> > I have proven designs for PSK radios for 23 and 13cm - all I need is
> something
> Hi John!
>
> You really should check at http://www.hamradio.si/hamradio/packet.html
>
> We allready have 13/23 cm PSK RTX for high speed packeting...
>
> Bajko, S57BBA.
>
Bajko,
I had a look at your WEB site some weeks ago and managed to get the 13cm PSK
transceiver article. Excellent work, Matjaz and the others involved are to be
congratulated for producing something which actually works and is in use!
Biggest problem I had was the speed, as I am sure you know the site can be
very
slow when accessed from afar!
Congratulations, John vk3zjf
------------------------------
Date: Thu, 26 Sep 1996 09:42:13 +1000
From: Terry Dawson <terry@perf.no.itg.telstra.com.au>
Subject: higher speeds, coding etc..
Steven R. Sampson wrote:
> Is there another way to simplify? Yes. How simple is: just use the
> whole band. There is nothing simpler than that. Einstein would be
> proud. Is the equipment simple? Who cares. We don't know if
> Einstein would favor simple equipment over simple theory. If he saw
> how many organizations it took to hand out channel permits, I'm sure
> he'd favor spread spectrum. By channel permits I'm mostly thinking
> of the FCC and Frequency Coordinators, etc.
"Bands" are just coarse channels. How do you handle the case where
someone doesn't want to pay their fee to use the whole band because
they don't want the whole band? Do you create a very narrow band for
them to use the whole of ?
Personally I prefer the Australian Spectrum Management Agency's
approach. Bands are an administrative convenience to help avoid
interference, how much you pay is determined by how much you use,
and use is defined by bandwidth*geographical area/number you share
with, or something like that.
I think Einstein might have been thinking more of "generic" than
"simple".
But nobody asked me.
Terry
------------------------------
Date: Tue, 24 Sep 1996 21:11:16 -0500
From: John Donaldson <john@wb5dgq.hounix.org>
unsubscrib tcp-group john@wb5dgq.hounix.org
------------------------------
End of TCP-Group Digest V96 #202
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