Hi Simon and Johan, I have read an article on the subject. Presumably it was the QEX article you refer to, but I am not sure. I also spent quite some time in trying to implement an algorithm for SSB fine tuning into Linrad. That was not sucessful. Check with a waterfall display what the spectrum looks like. Stations that do not use speech processors have typically voice waveforms that repeat for a while and generate equidistant spectral peaks. It is not difficult to guess their common origin since the separation varies a little.
When heavy speech processing is used, a method based on power spectra fails completely. I can hear by ear so it must be possible to do it in the computer. I have no idea what kind of processing one would have to apply. 73 Leif / SM5BSZ > I don't have the QEX article - I think there was a bit more to it than that. > > I don't have time at the moment but later this summer I will. > > Simon Brown, HB9DRV > http://sdr-radio.com > > > > -----Original Message----- > > From: [email protected] [mailto:[email protected]] On > > Behalf Of Johan H. Bodin > > > > I don't know how existing SSB auto tuning systems work but I think it > > could be done by looking for fundamental tones F and their harmonics > > N*F > > in the speech spectrum and adjust the tuning until they line up > > properly. Just an idea... > > > > > > > ------------------------------------ > > Yahoo! Groups Links > > > --
