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I had the great fortune to take a class from Dr. Steve Franke. It was a class on radio communication circuits, and a big chunk of the class was devoted to talk

I had the great fortune to take a class from Dr. Steve Franke. It was a class on radio communication circuits, and a big chunk of the class was devoted to talking about the different modes. I remember he got really animated talking about phase-shift keying. Dr. Franke is the F in FT-8.

vvanders 9y ago
That's very cool, PSK or QAM is pretty darn incredible. I highly recommend breaking open say Numpy or Matlab and working backward from quadrature(sin+cos) into basic 2-PSK, 4-PSK and N-QAM RF mixer modulation/demodulation. The math behind it is mostly basic trig and really impressive considering it is the underpinning of all modern RF modulation(wifi is 2/4/16/64/256-QAM modulation per OFDM carrier for instance).
- brian-armstrong 9y ago
  If you're a software person, reading how liquid DSP does these modes is very insightful https://github.com/jgaeddert/liquid-dsp/tree/master/src/modem/src https://github.com/jgaeddert/liquid-dsp/tree/master/src/mode...
  - vvanders 9y ago
    That looks really cool. Most of work these days is upstream from TNCs/etc but def keep that in mind if I end up playing around at the modulation level.
  - madengr 9y ago
    GNU Radio too.
mrtnmcc 9y ago
Go Fighting Illini!
- therein 9y ago
  Oh wow he went to UIUC. Another reason to be proud myself. :)