Tutorials

Generation of Pulse Position Modulation (PPM) and Pulse Width Modulated (PWM) Signal

Krishanu Mitra
16 Apr 2017
Read Time : 10 Minutes
Generation of Pulse Position Modulation (PPM) and Pulse Width Modulated (PWM) Signal

In Pulse Position Modulation, both the pulse amplitude and pulse duration are held constant but the position of the pulse is varied in proportional to the sampled values of the message signal. Pulse time modulation is a class of signalling techniques that encodes the sample values of an analog signal on to the time axis of a digital signal and it is analogous to angle modulation techniques. The two main types of PTM are PWM and PPM. In PPM the analog sample value determines the position of a narrow pulse relative to the clocking time. In PPM rise time of pulse decides the channel bandwidth. It has low noise interference.

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