PAM is the simplest form of data modulation .The amplitude of uniformly spaced pulses is varied in proportion to the corresponding sample values of a continuous message m (t).
A PAM waveform consists of a sequence of flat-topped pulses. The amplitude of each pulse corresponds to the value of the message signal x (t) at the leading edge of the pulse.
The pulse amplitude modulation is the process in which the amplitudes of regularity spaced rectangular pulses varies with the instantaneous sample values of a continuous message signal in a one-one fashion. A PAM wave is represented mathematically as,
Where,
x (nTs) = represents the nth sample of the message signal x(t),
K = is the sampling period,
Ka = constant called amplitude sensitivity,
P(t) = denotes a pulse.
PAM is of two types,
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Krishanu Mitra is an Associate Author of “Day On My Plate”. Moreover he is a Nature Lover, Traveller and an Academician by profession.