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What are the pros and cons of commonly used modulation techniques? Why is one preferred over another in a given situation? Why do so many exist? Are some better at resisting noise, travelling long distances, packing more data?

Analog

  • Amplitude modulation
  • Frequency modulation
  • Phase modulation

Digital

  • Phase shift keying
  • Frequency shift keying
  • Amplitude shift keying
  • Quadrature amplitude modulation
  • Orthogonal frequency division modulation
  • Direct sequence spread spectrum

*And any other major ones I missed in the list above

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closed as too broad by Dilip Sarwate, MBaz, Matt L., Tendero, Stanley Pawlukiewicz Jul 3 '18 at 23:48

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