Matlab Code for Phase Modulation

 Program:

clc;

clear all;

t = 0:0.001:1;

vm = input('Enter the amplitude of message signal = ');

vc = input('Enter the amplitude of carrier signal = ');

fm = input('Enter the message frequency = ');

fc = input('Enter the carrier frequency = ');

m = input('Enter modulation index = ');

sm = vm*sin(2*pi*fm*t);

subplot(3,1,1);

plot(t,sm);

xlabel('Time ---->');

ylabel('Amplitude ---->');

title('Message Signal');

grid on;

sc = vc*sin(2*pi*fc*t);

subplot(3,1,2);

plot(t,sc);

xlabel('Time ---->');

ylabel('Amplitude ---->');

title('Carrier Signal');

grid on;

y = vc*sin(2*pi*fc*t+m.*sin(2*pi*fm*t));

subplot(3,1,3);

plot(t,y);

xlabel('Time ---->');

ylabel('Amplitude ---->');

title('PM Wave');

grid on;

Output:

Enter the amplitude of message signal = 5

Enter the amplitude of carrier signal = 5

Enter the message frequency = 10

Enter the carrier frequency = 100

Enter modulation index = 4

Output:

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