MATLAB CODE FOR SAMPLING THEOREM

SAMPLING THEOREM: 
              In the field of digital signal processing, the sampling theorem is a fundamental bridge between continuous-time signals (often called "analog signals") and discrete-time signals (often called "digital signals").
To understand sampling theorem the following matlab code is useful.

MATLAB CODE:

%Program for sampling theorem

f1=1/128;

f2=5/128;

n=0:255;

fc=50/128;

x=cos(2*pi*f1*n)+cos(2*pi*f2*n);

xa=cos(2*pi*fc*n);

xamp=x.*xa;

subplot(2,2,1);

plot(n,x);

title('x(n)');

xlabel('Sn-->');

ylabel('Amplitude');

subplot(2,2,2);

plot(n,xa);

title('xa(n)');

xlabel('n-->');

ylabel('Amplitude');

subplot(2,2,3);

plot(n,xamp);

xlabel('n-->');

ylabel('Amplitude');

OUTPUT:

 For MORE DETAILS CLICK HERE