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

// AM --> Amplitude Modulation

Ac=5; // Amplitude of the Carrier Signal.
Am=3; // Amplitude of the Modulating (Message) Signal.
wm=1;  
wc=10;

t=[1:0.002:13];

m=Am*cos(wm*t);
c=Ac*cos(wc*t);
meu=0.2;
Sam=Ac*(1+meu.*cos(wm*t)).*cos(wc*t);

plot(t,m, 'black', t,c, 'red', t,Sam , 'blue');
legend('message', ['carrier'], ['combined']);
xtitle('Amplitude Modulation');
xlabel('Time');
ylabel('Amplitude');

// Output
                                      AM --> Amplitude Modulation