hi jason zheng,
as you probably know,
a 2^20 point FFT won't fit on an fpga,
as it requires 2^19 times 36 bits of memory.
the largest single fft that we've ever used
on an FPGA is 2^15 points.
to implement higher resolution spectrum analyzers
one needs to implement analysis in
two stages (course PFB, followed by fine FFT). for example
see the 128 million point spectrometer block diagram at
http://seti.berkeley.edu/jplsetispec/block_diagram.pdf
best wishes,
dan
Jason Zheng wrote:
Last time I tried this on 10.1 with a 2^20 FFT design, the Matlab froze
for a long time and I ended up closing the program.
On Mon, Jul 27, 2009 at 8:31 AM, Laura Spitler <[email protected]
<mailto:[email protected]>> wrote:
Hello everyone,
What's the status of large green FFTs, where "large" is greater than
2^11? Can they now be reliably synthesized in 10.1?
Thanks,
Laura
