With the help of LabVIEW FFT

The FFT LabVIEW uses the usual term of eponential:

e ^ (-i * 2 * pi * k * n/N)

Is it possible that I could change this term to include a constant and perform the FFT as usual? that is to replace the exponential term above with something including a constant 'c ':

e ^ (-i * 2 * pi * k * n * c/N)

I actually use a 2D on a square table 2D FFT, but hopefully a solution to the case 1 d above would be easy to apply.

If it's more math than the programming problem, a point in the right direction would be always greatly appreciated!

The only parameter that you can control is N, the number of samples in the dataset.  You can try to do 1/N ' = c/n.  See if this will give you the results you expect. If c < 1,="" then="" n'=""> N and fill the input data will be required.  For otherwise, a reduced supply is necessary.  Pay attention to how the data is compressed so that you don't miss any information.

Lynn

Tags: NI Software

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