Combination

Complex time domain signals and QAM

Complex time domain signals and QAM
  1. What are QAM signals?
  2. Is QAM a combination of ASK and PSK?

What are QAM signals?

QAM (quadrature amplitude modulation) is a method of combining two amplitude modulation (AM) signals into a single channel. This approach helps double its effective bandwidth. QAM is also used with pulse AM (PAM) in digital systems, like wireless applications.

Is QAM a combination of ASK and PSK?

QAM is based on the application of ASK and PSK to two sinusoidal waves of the same frequency but with a phase difference of 90°. Sinusoidal waves 90° apart are said to be in a quadrature phase relationship.

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