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roman_zeyde | 7 years ago

QAM is using both carrier's amplitude and phase to encode information, so I/Q can be thought as [1]:

  I = amplitude*cos(phase)
  Q = amplitude*sin(phase)
[1] http://whiteboard.ping.se/SDR/IQ

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viraptor|7 years ago

I'm just sitting here and staring at this sentence: "The modulated signal rides on a carrier of a given frequency, but the base band signal got no fixed frequency at all. Because of this, we have the possibility to encode the two-dimensional I/Q signal onto the one-dimensional RF signal without losing anything." I may need to sleep on it...