Thank you Ted for your remark on:

> The Optimum filter proposed by Norbert Wiener... you may
> realize the main problem with this approach. You need to know the original
> signal which in most cases is unkown.

"A noteable case where it IS known is the GLONASS/GPS thing (and
spread-spectrum systems in general), and this sort of filtering is used to
considerable effect to retrieve a signal from well below the noise floor. ..."

Good example, although I guess a so-called Matched filter would be even better
in this case. But notice: If there is heavy noise, as with in the mentioned
case, a Wiener filter behaves approximately like a Matched filter (correlation filter).


Robert C. asked whether it's Wiener or "Weiner". It is definitely the first,
but at least some US-Americans have difficulties with German "ie" which simply
should be spoken like a long english "e". There is an other example, a circuit
called Wien-bridge (a filter as well) -- named after the German physicist Wien
-- often is misspelled "Wein-bridge" in the US-American literature. Bei the
way _Wien_ is the German name for the capital of Austria that you (correctly)
call Vienna. Furthermore, "Wein" is German for vine. No big problems -- just
some remarks...

Best to all of you,

Herbie
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H.Glu@...

Re: Robert C.'s other remark:

"Oscar Mayer is a hot dog  (frankfurter) brand here in the states, thus the
whole statement was simply a setup for a great (bad) pun. Sense of humor
required."

Thanks for the info.
You see, although it might have been a lack of humor from my side, it actually
was the name Oscar Mayer that didn't bring up any associations...

PS: Hot dogs we call Frankfurters in a roll, either with mustard or ketchup.
With respect to this thread's topic I should like to mention that about half
the Germans call Frankfurters Wieners. (Although this is really true: Sense of
humor required...)
:-)