Also found in: Acronyms, Wikipedia.
pulse-position modulation[′pəls pə¦zish·ən ‚mäj·ə‚lā·shən]
Modulation of a pulse carrier wherein the value of each instantaneous sample of a modulating wave varies the position in time of a pulse relative to its unmodulated time of occurrence. Abbreviated PPM. Also known as pulse-phase modulation.