2. Program to generate PM Signal and analyze the effect of increasing modulation index for each modulation technique.

 

Program to generate PM Signal and analyze the effect of increasing modulation index for each modulation technique.

// PM --> Phase Modulation

Ac=10;
Am=1;
wm=2*%pi*25;
wc=2*%pi*400;
t=[1:0.0002:1.1];

m=Am*cos(wm*t);
c=Ac*cos(wc*t);


subplot(5,1,1);
mf=60;
Sam1=Ac*cos(wc.*t+(mf)*sin(wm.*t));
plot(t,Sam1,'red');
legend('m=60');

mf=80;
subplot(5,1,2);
Sam=Ac*cos(wc.*t+mf*sin(wm.*t));
plot(t,Sam ,'blue');
legend('m=80');
xlabel('Time');
ylabel('Amplitude');


subplot(5,1,3);
mf=90;
Sam=Ac*cos(wc.*t+mf*sin(wm.*t));
plot(t,Sam,'black');
legend('m=90');


subplot(5,1,4);
mf=100;
Sam=Ac*cos(wc.*t+mf*sin(wm.*t));
plot(t,Sam,'green');
legend('m=100');


subplot(5,1,5);
mf=150;
Sam=Ac*cos(wc.*t+mf*sin(wm.*t));
plot(t,Sam,'cyan');
legend('m=150');
// Output


                                        PM --> Phase Modulation






































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  1. Alex CareyAugust 19, 2026 at 10:30 PM
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