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- Modulation in which the amplitude of individual, regularly spaced pulses in a pulse train is varied in accordance with some characteristic of the modulating signal. Note: The amplitude of the amplitude-modulated pulses conveys the information.
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- adaptive differential pulse-code modulation (ADPCM), carrier (cxr), chirping, Di Group, digital modulation, hop, multipulse test signal, pulse carrier, pulse-duration modulation (PDM), pulse-frequency modulation (PFM), pulse-interval modulation, pulse-length modulation, pulse link repeater (PLR), pulse-position modulation (PPM), pulse-repetition-rate modulation, pulse-time modulation (PTM), pulse-width modulation (PWM), pulsed FM systems, sub-band adaptive differential pulse code modulation (SB-ADPCM)