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To Generate the Pulse Amplitude Modulated Signals

Krishanu Mitra
10 Apr 2017
Read Time : 10 Minutes
To Generate the Pulse Amplitude Modulated Signals

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,

  1. Double polarity PAM = This is the PAM wave which consists of both positive and negative pulses as shown in figure.
  2. Single polarity PAM = This consists of PAM wave of only either negative (or) Positive pulses. In this the fixed dc level is added to the signal to ensure single polarity signal. It is represented as

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Authored By Krishanu Mitra

Krishanu Mitra is an Associate Author of “Day On My Plate”. Moreover he is a Nature Lover, Traveller and an Academician by profession. 

Our Vision

A Platform of Bloggers to share idea in shorts. Day On My Plate provides latest tech tips, incorporates current feeds, lifestyle, travel, photography and education with video tutorials.

Author Name : Ritam Dutta [Co-Founder & Author ]

Ritam Dutta

Co-Founder & Author

View Details
Author Name : Papri Ghosh [Co-Founder & Author ]

Papri Ghosh

Co-Founder & Author

View Details
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