Hello Markus and group,
Many thanks for that - I have nc3f4 running on my notebook PC now. All
that is missing now is an extra "sound-input" utility for the SDR-IQ
(which I use for listening on 136 and 500 kHz). SDR-IQ (and also
Perseus, which is due to arrive here soon) use non-standard sampling
rates, but I am sure your SMPSU-noise-reduction algorithm can work with
that, too. Will let you and the group know the results.
BTW Does the GM4ISM grabber use your utility, too ? There seems to be
less garbage around 506 kHz than there used to be ;-)
Cheers,
Wolf DL4YHF .
Markus Vester schrieb:
Dear LF,
as our LF and MF receiving is often plaguesd by intense hash from
various switch mode power supplies, I have tried to work towards a
software noise canceller, using estimation and subtraction. A short
description of the technique, along with free experimental software
and sourcecode, can be found on
http://members.aol.com/df6nm2/smps_nc/NC3F4.zip (63 kB). Hope you may
find it useful...
Kind regards
Markus, DF6NM
|
