Amplitude modulation

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What is AM?

Amplitude Modulation is the done by modulating the Amplitude of an sinoid Carrier signal. The Carrier Signal has usually a higher Frequency than the modulating signal.

An Example

Picture1: Carrier Signal in time domain Picture2: Carrier Signal in frequency domain Picture3: Modulating Signal in time domain Picture4: Modulating Signal in frequency domain

Picture5: Modulated Signal

special kinds of AM

  • DSSC, double side band supressed carrier
  • SSB, single side band
  • residual sideband modulation (modulation used for analog TV applications)
  • QAM