FFT in FPGA?
FFT in FPGA?
(OP)
Not quite sure where to put this.
I just had a request yesterday, if I would be able to create a small, say 4, 12 bit inputs, FFT in a FPGA.
We use the Altera Cyclone series, and Altera does have a MegaCore FFT, which, however, starts at 64 inputs and uses way too many resources in the Cyclone. A posting to Altera's support has revealed, that the function can not be scaled down.
In other words, I have to create something myself.
Does anybody know where to find an algorithm, that can be implemmented without using a DSP core or similar?
I do have a Pascal module I can try to figure out, but if it is of any use for hardware is unknown.
I just had a request yesterday, if I would be able to create a small, say 4, 12 bit inputs, FFT in a FPGA.
We use the Altera Cyclone series, and Altera does have a MegaCore FFT, which, however, starts at 64 inputs and uses way too many resources in the Cyclone. A posting to Altera's support has revealed, that the function can not be scaled down.
In other words, I have to create something myself.
Does anybody know where to find an algorithm, that can be implemmented without using a DSP core or similar?
I do have a Pascal module I can try to figure out, but if it is of any use for hardware is unknown.





RE: FFT in FPGA?
You probably need to post this question in the Circuits Engineering forum, (forum240).
http://www.eng-tips.com/threadminder.cfm?pid=240
RE: FFT in FPGA?
( wouldn't be possible/worth to use a microcontroller or DSP?)
<nbucska@pc33peripherals.com> omit 33 Use subj: ENG-TIPS
Plesae read FAQ240-1032
RE: FFT in FPGA?
I followed NWBeaver's advice and posted more or less the same question under Circuit Engineering.
The answers there were more like questions to what on Earth I was trying to do, so I put a much more detailed description about the system there.
Also, I have now tried to simulate the system i Exel, which shows that it seems to work. Don't ask me too much about WHY.
Our math guys are stil debating that part.