Hello Topbanders,
Has anyone used DSP and/or and SDR to receive extremely weak signals on 160
that
are buried in the noise?
I posted an inquiry about how DSP might pull out signals buried in the noise
that are "impossible" to copy even with a good ear/brain combo. I've done
quite
a bit of Googling. However, the only real 'hard evidence' I've seen is at
http://www.sdrham.com/winrad/index.html . Go to the bottom of the page, where
it says:
"As an example of the filtering features, listen to these two audio samples.
>In the first, a CW CQ EME is made completely inaudible by static crashes.
>The second sample is the same audio file, but filtered trough the Noise
>Blanker
>feature of Winrad."
>
>Listen to the two audio files. It is simply amazing.
>I'm not calling that site author a liar. Nothing like that. I just want to
>hear
>from others who can say they see that same enhancement regularly, and under
>what
>set of circumstances.
If anyone is so inclined, I'd appreciate your opinion on a related inquiry I
posted at
http://www.eham.net/ehamforum/smf/index.php/topic,72452.0.html
and
http://forums.qrz.com/showthread.php?t=276972
Interesting subject. At least I think so. Regardless of what people say in
reply, I'd like to try this myself. But I'd rather not re-invent the wheel,
which is the reason for my post.
At the very least, perhaps all it would take is connecting RX audio to a good
sound card on a PC running the right software. Or, the RX IF to an SDR which is
in turn connected to a good sound card (as ON4UN mentions in his new book).
73,
Mike Waters
www.w0btu.com
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UR RST IS ... ... ..9 QSB QSB - hw? BK
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