Pulse-amplitude modulation
| Passband modulation | 
|---|
| Analog modulation | 
| Digital modulation | 
| Hierarchical modulation | 
| Spread spectrum | 
| See also | 
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Pulse-amplitude modulation (PAM) is a form of signal modulation in which the message information is encoded in the amplitude of a pulse train interrupting the carrier frequency. Demodulation is performed by detecting the amplitude level of the carrier at every single period.