4/30/2021 0 Comments Ppm Vs Pwm Receiver
The major difference between PAM, PWM and PPM lies in the parameter of a pulsed carrier that varies according to the modulating signal.In PWM, the width of the pulses of the carrier wave is varied according to the modulating signal.As against, in PPM, the position of the pulses shows variation according to the modulating signal.Here, in this article, we will discuss other important factors that differentiate the three.
It is a modulation technique in which the amplitude of the pulsed carrier signal is changed according to the amplitude of the message signal. But the major difference is that unlike AM, here the carrier wave is a pulse train rather than continuous wave signal. In PWM the width of the pulses is varied according to the amplitude of the message signal. PWM technique is similar to frequency modulation because, by the variation in the width of the pulses, the frequency of the pulses in the PWM signal shows variation. It is a technique in which the position of the pulses is changed in accordance with the amplitude of the modulating signal. It is to be noted here that the position of the pulse changes according to the reference pulses. In PWM width of the pulses shows proportionality with the amplitude of the message signal. As against PWM and PPM has low noise interference factor because their noise immunity is high. But PPM technique needs synchronization between transmitter and receiver section. However, it is constant in case of PPM because both amplitude and width are constant in case of PPM. But in case of PWM and PPM, rise time of the pulse is a factor on which the transmission channel bandwidth depends. While both PAM and PWM do not require synchronization pulses.
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