DISCRETE FORIER TRANSFORM & INVERSE FORIER TRANSFORM MATLAB PROGRAM

DISCRETE FORIER TRANSFORM & INVERSE FORIER TRANSFORM

 

 

%Discrete forier transform

 

x1=input('Enter the sequence x1=');

N=input('Enter the value of N=');

xk=fft(x1)/N;

subplot(2,2,1);

n=0:1:length(xk)-1;

stem(n,abs(xk));

title('Absolute value of Forier transform');

subplot(2,2,2);

stem(n,angle(xk));

title('Angle of Forier transform');

pause;

 

%Inverse forier transform

 

xk1=ifft(xk)*N

subplot(2,2,3);

stem(n,xk1);

title('Input sequence');

 

 

 

 

 

 

 

 

 

 

 

 

 

Observation:

 

Enter the sequence x1=[1,2,3,4,5]

Enter the value of N=2

 

xk1 = 1 2 3 4 5