ORIGINAL MESSAGE:
On Sun, 22 Oct 2006 11:32:48 -0700, Kok Chen <chen@mac.com> wrote:
>I think this is reason why many people use multiple modems. With
>cocoaModem, I had implemented 9 separate FSK demodulators to watch a
>single signal -- each demodulator has a slightly different relative
>mark/space delay and a different ATC (automatic threshold correction
>in the slicer) time constant. The nine outputs then goes through a
>soft decision logic to print a single character to the screen --
>basically, it is like a human watching multiple modems to decide
>which character to use when they are different, but it is not as
>smart as a human, it does not do context sensitive stuff that a human
>brain is really good at; or the 123456... to QWERTY conversion in
>Baudot. A good adaptive equalizer will be better than using multiple
>demodulators, but I am not smart enough to design a good adaptive
>equalizer for HF band conditions.
------------ REPLY FOLLOWS ------------
very impressive. I think the time has come for me to try cocoaModem. I
know nothing about Apple computers, however. Could you advise me on
what to look for in a computer? I will probably look on eBay. What do
you suggest?
Many thanks,
73, Bill W6WRT
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