Thanks guys :) On Thu, Nov 19, 2020 at 9:30 AM Jeb Bailey <[email protected]> wrote:
> Check out the Xilinx SSR FFT block in the system generator blockset. It > will make timing on the ZCU111 in 8x4096 at 512 MHz and is very efficient. > They also have and HLS SSF FFT that isn’t quite as performant (but has > public sources. It is in the Vitis IP library on github. > > We are using the former in our overlapped PFB. > > -Jeb > > —— > Dr. J.I. Bailey, III (Jeb) / Project Scientist > Mazin Lab <http://web.physics.ucsb.edu/~bmazin/> / Department of > Physics, UCSB > jebbailey.com / +1 (734) 389-5143 / skype:spacecolonyone > > On Nov 18, 2020, at 10:55 PM, James Smith <[email protected]> wrote: > > Hello Morag, > > AFAIK, Xilinx's FFT IP block only accepts a single block at a time. I > think that was a large part of the reason why there's a CASPER FFT in the > first place - because we needed multiple samples at once. > > We have used the Xilinx core in narrowband designs in the past - KAT-7's > narrowband modes were done that way, after a first "coarse" channelisation > stage using a Casper PFB, and an async pfb_fir followed by the Xilinx FFT > block. If you want to pick them apart, they are in here: > https://github.com/ska-sa/kat7_fpga/tree/master/fengine_oh (warning: > newer versions of Matlab / mlib_devel may struggle with these old files. > AVN's narrowband R2 design is somewhat more modern if you have a R2 setup > handy, they are based on similar principles: > https://github.com/ska-sa/AVNRoachGateware/tree/devel/source/NarrowBandSpectrometer > ) > > Regards, > James > > > On Wed, Nov 18, 2020 at 5:53 PM Morag Brown <[email protected]> wrote: > >> Hi all, >> >> Has anyone ever put together a wideband FFT (i.e an FFT that accepts >> multiple demuxed samples per FPGA clock cycle) using the Xilinx sysgen FFT >> block? Looking at the docs, it seems the IP core can't be configured to >> accept multiple parallel inputs (but I could be wrong), so one would need >> to construct the 2D decomposition of the 1D FFT using Xilinx FFT blocks as >> primitives. >> >> I'm doing some FFT comparisons for my MSc, and would like to include the >> Xilinx core. I thought it'd be good to check if anyone's already >> implemented this before embarking on the adventure myself... >> >> Morag Brown >> SARAO >> >> -- >> You received this message because you are subscribed to the Google Groups >> "[email protected]" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CAGH-0Teev7EW%2BN6EJ2EPAtE%3DL%2BgBASV7RE8ea0uSkz9ehtwsqA%40mail.gmail.com >> <https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CAGH-0Teev7EW%2BN6EJ2EPAtE%3DL%2BgBASV7RE8ea0uSkz9ehtwsqA%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> > > -- > You received this message because you are subscribed to the Google Groups " > [email protected]" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CAG67D34M_7Fnz18OjZ8wHpW3tFuOUyH_RjaKm3jbZVD7dhsiug%40mail.gmail.com > <https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CAG67D34M_7Fnz18OjZ8wHpW3tFuOUyH_RjaKm3jbZVD7dhsiug%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > > > -- > You received this message because you are subscribed to the Google Groups " > [email protected]" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/2EF47892-3603-49B1-A461-091304CE91A5%40ucsb.edu > <https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/2EF47892-3603-49B1-A461-091304CE91A5%40ucsb.edu?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "[email protected]" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CAGH-0TczvaivHk%3DgFywr22v-0O_uOecct%3DXiJAsrup45P%2B%3DsQA%40mail.gmail.com.
