Maybe a sound processing system can analyze the sound signal and place the FT8 signal between the lowest human harmonic frequencies greater than 300Hz.
After a compressor/clipper a bandwidth (50-100Hz?) with some center frequency automatically chosen above, should be notched out - and the FT8 signal inserted here. The FT8 signal must be inserted, after the non-linear compressor/clipper, so the FT8 signal is not subjected to non-linearity. OZ1HFT - > Den 23. sep. 2021 kl. 19.27 skrev Philip Gladstone > <pjsg-w...@nospam.gladstonefamily.net>: > > I think that it would be an interesting experiment to transmit voice on SSB > with a continuous FT8 transmission (maybe at around the 1kHz offset) and see > whether there is a combination of offset & volume difference that makes the > FT8 decodable if the SSB is barely understandable or better, and yet have the > FT8 transmission be essentially inaudible. > > I'd like the FT8 transmission to just send the sender's callsign and locator > and not much else. This could be entirely automated by the > radio/microphone/speech processor/whatever. > > Philip > _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
