Amplitude modulation by function

Matlab program for Amplitude modulation and demodulation by inbuilt matlab function.

clc; clear all;close all;

t=0:0.001:1; % Define time axis

A=1; % Amplitude

fm=4; % Message Signal frequency

fc=40; % Carrier Signal frequency

% Message Signal

Sm=A*sin(2*pi*fm*t);

subplot(4,1,1);

plot(t,Sm);

xlabel('Time');

ylabel('Amplitude');

title('Message Signal');

% Carrier Signal

Sc=A*sin(2*pi*fc*t);

subplot(4,1,2);

plot(t,Sc);

xlabel('Time');

ylabel('Amplitude');

title('Carrier Signal');

% Amplitude modulated Signal

Sam=ammod(Sm,fm,fc);

subplot(4,1,3);

plot(t,Sam);

xlabel('Time');

ylabel('Amplitude');

title('Amplitude modulated Signal');

% Amplitude Demodulated Signal

Sadm=amdemod(Sam,fm,fc);

subplot(4,1,4);

plot(t,Sadm);

xlabel('Time');

ylabel('Amplitude');

title('Amplitude Demodulated Signal');

Scigyan