looking for FFT/IFFT core for FPGA

I'm trying to find a 64-point FFT/IFFT core. Target is Actel IGLOO FPGA 
family. Needs to run fast enough to complete in 3.2us, which is tough in an 
IGLOO. Actel has a free FFT core but it is not quite fast enough. It's a 
radix-2 core, which is not optimal for this application. Radix-4 would be 
better.

I've looked at the cfft core on Opencores and it may work for us, but also 
want to check commercial options.

Thanks,
Rob 

On Thu, 15 Jan 2009 10:34:51 -0800, robj wrote:

> I'm trying to find a 64-point FFT/IFFT core. Target is Actel IGLOO FPGA
> family. Needs to run fast enough to complete in 3.2us, which is tough in
> an IGLOO. Actel has a free FFT core but it is not quite fast enough.
> It's a radix-2 core, which is not optimal for this application. Radix-4
> would be better.
> 
> I've looked at the cfft core on Opencores and it may work for us, but
> also want to check commercial options.
> 
> Thanks,
> Rob

There's a fellow who hangs out on the fpga newsgroup (comp.fpga?) who 
does DSP on FPGAs a _lot_.  You may be able to get good results by cross-
posting over there (if you do, the tidiest thing to do would be to reply 
to your own post and cross-post it, instead of multiple posting).

-- 
Tim Wescott
Control systems and communications consulting
http://www.wescottdesign.com

Need to learn how to apply control theory in your embedded system?
"Applied Control Theory for Embedded Systems" by Tim Wescott
Elsevier/Newnes, http://www.wescottdesign.com/actfes/actfes.html

Tim Wescott wrote:

   ...

> There's a fellow who hangs out on the fpga newsgroup (comp.fpga?) who 
> does DSP on FPGAs a _lot_.  

   ...

Do you mean Ray Andraka? He used to be a regular here. 
http://www.andraka.com/

Jerry
-- 
Engineering is the art of making what you want from things you can get.
¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯

There are one or two sites with lots of open-source verilog
cores, but I do not have the links to them.  Googling on
something like "open source verilog" produces lots of hits.

But often, it is easier to just write your own code than have
to interpret and apply someone else's design.

Steve

On Jan 15, 12:34&#4294967295;pm, "robj" <r...@abc.net> wrote:
> I'm trying to find a 64-point FFT/IFFT core.

Check out http://www.dilloneng.com/.  They have high performance
commercial cores that would be applicable.

Thanks everyone for the suggestions.

Rob