Dan MD1CLV wrote:
> Hi all,
> Is anyone using GNURadio to modulate or demodulate PSK31? According to
> the archives, Chuck Swiger did have this working, but the page with his
> code on is gone and it isn't archived on the wayback machine.
Chuck has put up a new webpage at
The GnuRadio stuff is under
But I can't find the PSK31 stuff.
On his old page it was at:
(I am very happy though that his GnuRadio vector analyzer info is back online)
I have successfully decoded PSK31 in the past using the following.
Capture using Gnuradio to file.
convert the file to a wav file using sox
decode the file using some other opensource PSK31 program.
You can do all this in realtime if you use Pipes in stead of files.
in pseudocode it would look something like this:
usrp_rx_cfile.py [commandline options here] -s psk.raw
sox [commandline options here] psk.raw -o psk.wav
It's a while ago, so I don't remember all settings I used.
I think I captured to file in the short format (not in the float format)
Of course, much better is to implement PSK31 in the gnuradio framework.
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