The figure depicts time domain representation of the PAM technique which mentions analog message signal and PAM modulated signal as output. The PWM signal is a pulse signal which pulse width is proportional to the amplitude of the modulating analog signal.
The figure depicts time domain representation of the PWM. In PAM, the amplitude of the pulsed carrier signal is varied according to the amplitude of analog 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. These are known as analog pulse modulation techniques because a pulsed carrier is varied according to analog message signal.
Here, in this article, we will discuss other important factors that differentiate the three. PAM stands for pulse amplitude modulation. It is a modulation technique in which the amplitude of the pulsed carrier signal is changed according to the amplitude of the message signal. While in PPM the location of pulses changes with respect to the modulating signal. Thanks for reading. I am a professional engineer and graduate from a reputed engineering university also have experience of working as an engineer in different famous industries.
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