problem with Fast Fourier Transform (FFT)

2013 4 11

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Hello,

This is part of my code to convert data in time domain using ifft.

 for k = 1:numSymbols,
        y= y + data(k)*exp(j*2*pi*Fsub(k)*t);
 end

and how do i write the fft if i wanna change y back into frequency domain?..

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Image Analyst 2013-4-13

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ffty = fft(y);
% Get back
y = ifft(ffty);

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