How to perform deconvolution using FFT

[Chauhan]

Hello Everyone

Is there anyone who knows the algorith or can provide me with a vi that shows how to perform deconvolution of two functions using FFT. In the labview help for deconvolution, the algorith suggested is.

1. Compute the Fourier transform of the input sequence X * Y.
2. Compute the Fourier transform of the input sequence Y.
3. Divide the Fourier transform of X * Y by the Fourier transform of Y. Call the new sequence h.
4. Compute the inverse Fourier transform of h to obtain the deconvolved sequence X.

i tried to do th same but didn't work. I am attaching a Vi in which first i convoluted a Square pulse with triangular pulse. Then i deconvoluted the convoluted signal using triangular pulse with the deconvolution tool given in labview. Then i tried to do the deconvoltion using the FFT algorith but didn't work. Is there anyone who has any idea on how to perform deconvolution using FFT.

Regrads

Chauhan

[Matt_W1]

I'm not sure if it's completely correct but it seems to spit out the right numbers.

[Chauhan]

Hi Matt

Thanks for your quick help. Would it be possible to provide this vi for Labview 8.5. Actually i do not have Labview 9.

Regards

Chauhan

[Greg_J · Accepted solution]

Hi Chauhan,

This should work in 8.5.  Let us know if you still have trouble opening it.

- Greg J

[Chauhan]

Thanks Friends

It helped me a lot.

Chauhan