clc;
clear all;
A=5;
t=0:0.001:1;
f1=input("Carrier signal frequency: ");
f2=input("Message signal frequency: ");

x1 = A*sin(2*pi*f1*t);
u = A/2 .* square(2*pi*f2*t) + (A/2);

y = x1 .* u;

subplot(3, 1, 1);
plot(t, x1);
title("Carrier Signal");
xlabel("Time");
ylabel("Amplitude");


subplot(3, 1, 2);
plot(t, u);
title("Message Signal");
xlabel("Time");
ylabel("Amplitude");


subplot(3, 1, 3);
plot(t, y);
title("ASK Signal");
xlabel("Time");
ylabel("Amplitude");