Frequency modulation

Matlab program for Frequency modulation.

Matlab code

clc;

clear all;

close all;

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

A=1;        % Amplitude

fm=10;      % Message Signal frequency

fc=80;     % Carrier Signal frequency

m=4;     % m=freqdev/fm

% Message Signal

Sm=A*sin(2*pi*fm*t);                 

subplot(3,1,1);

plot(t,Sm);

xlabel('Time');

ylabel('Amplitude');

title('Message Signal');

% Carrier Signal

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

subplot(3,1,2);

plot(t,Sc);

xlabel('Time');

ylabel('Amplitude');

title('Carrier Signal');

% Frequency Modulated Signal

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

subplot(3,1,3);

plot(t,Sfm);

xlabel('Time');

ylabel('Amplitude');

title('Frequency Modulated Signal');

Figure window