Simulation / Generation of PAM Signal using MATLAB Code : Pulse Amplitude Modulation Using MATLAB

Pulse-amplitude modulation (PAM), is a modulation scheme where the message is encoded in the amplitude of a series of amplitude pulses. Its an analog modulation scheme in which the amplitudes of a train of carrier pulses are varied according to the amplitude of message signal. (This code assumes that the M is very large for a M-PAM Modulation).

MATLAB Code For PAM  (Pulse-amplitude modulation)
clc;
close all;
clear all;
a = input('Enter the amplitude = ');
f = input('Enter the frequency  = ');
t = 0:0.02:2; % for a total of 16 samples
x1 = 1; %generation of an impulse signal
x2 = a*sin(2*pi*f*t); %generation of sine wave
y = x1.*x2; %modulation step
subplot(3,1,1); %for impulse signal plot
stem(x1);
title('Impulse Signal');
xlabel('Time');
ylabel('Amplitude ');
subplot(3,1,2) %for sine wave plot
plot(t,x2);
title('Sine Wave');
xlabel('Time ');
ylabel('Amplitude ');
subplot(3,1,3) %for PAM wave plot
stem(t,y);
title('PAM Wave');
xlabel('Time');
ylabel('Amplitude');
Sample Input At MATLAB Command Window:
Enter the amplitude = 4
Enter the frequency  = 3 
Output of PAM wave in MATLAB
Simulation / Generation of PAM Signal using MATLAB Code : Pulse Amplitude Modulation Using MATLAB
Simulation / Generation of PAM Signal using MATLAB Code : Pulse Amplitude Modulation Using MATLAB

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