4 ms·

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

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.