Run time for building large DA FIR filters?

[Craig from Cambridge]

Any guidelines for efficiently building large distributed arithmetic (DA) filters?  I know I should build this filter as a multi-rate, but I'd like to avoide doing the math to figure it out & just make a big (3500 tap) DA filter. However, I havent' gotten this thing to build yet. I'm on a decent 4 year old quad-core Xeon running XP & 4 GB ram. I tried running all night but crashed before getting a result. Anything I should be doing with my settings to improve my chances? I assume even # of taps. I'm using the default 16/1 input data type.

[Trey_C]

Hi Craig,

As far as building DA filters, I have found a couple links that detail building FIR filters in LabVIEW.  These examples both use the NI LabVIEW Digital Filter Design Toolkit.

http://zone.ni.com/devzone/cda/tut/p/id/4851 

http://zone.ni.com/devzone/cda/tut/p/id/9700#toc1 

I do have one question though - are you building this on your computer or are you attempting to deploy this to a realtime target?  If, after looking through these resources, you are still having trouble then please just let me know!  

Thanks,

Trey C