Pulse Position Modulation

Cuthbert Nyack
A PPM signal and how it changes with amplitude and frequency of the modulating signal is shown in the applet below. The short lines above the pulses show where they would be in the absence of modulation. As in PAM and PWM the carrier is a pulse train and as in PWM each component of the carrier's spectrum becomes something similar to an FM spectrum.

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COPYRIGHT 1996 Cuthbert Nyack.