Arbitrary Frequency Response FIR Calculation

[nkeddem]

I am trying to implement the FIR filter design method in the follow book:

http://www.dspguide.com/ch17/1.htm

In my example a FIR filter is calculate that is equivilant to the IIR built into labview filter.  The plan is to evenutually feed in some more complex frequency response data.  I think my Inverse FFT implementation isn't quite correct in this application but I am not sure what is wrong because all I get is oscilations.  I have attached my code.  I would appreciate any help thank you.

[Burrito]

Hi nkeddem,

I found a couple of examples that you can try comparing to here: Example 1, Example 2.

Also here is a knowledgebase article on FFT in LabVIEW.