Hi Jack, Yes, the Xilinx SSR FFT is good, but there are some caveats. In my testing, its performance degrades severely if the FFT size is greater than 8192 or if the SSR is greater than 8. It’s very good on both DSP and BRAM utilization, but it’s mediocre on LUT usage and power consumption. It takes longer to synthesize than other FFTs, and simulation is incredibly slow: it takes about 10 times longer to complete an RTL simulation with the Xilinx SSR FFT than with any other FFT that I tested. It’s also missing some features, like any form of synchronization or even a reset. Thus it takes some work to make sure it starts taking the FFT at the desired time, and that might cause some problems synchronizing multiple FFTs for beamforming or cross-channel correlations.
So it’s good if its high points are what matters to you and you can get around its low points. What FFT size and SSR are you looking for? What type of application? Regards, Ross > On Feb 23, 2022, at 5:14 AM, Jack Hickish <[email protected]> wrote: > > Hi All, > > As others have reported > (https://www.mail-archive.com/[email protected]/msg08238.html > <https://www.mail-archive.com/[email protected]/msg08238.html>) the > Xilinx SSR FFT is pretty good. > > However, I want to do two real transforms instead of one complex -- does > anyone happen to have an unscrambler already made which I can steal? > Otherwise I suppose I'll have to make my own, which would be terribly tedious > :) > > Cheers > Jack > > -- > 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] > <mailto:[email protected]>. > To view this discussion on the web visit > https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CAG1GKSk0A7zP%2BgGwOo_VWW3QZv8cFOKtggiNqEqfdfCTRF72pQ%40mail.gmail.com > > <https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CAG1GKSk0A7zP%2BgGwOo_VWW3QZv8cFOKtggiNqEqfdfCTRF72pQ%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/3598CB06-4E6F-4060-A76F-31451029DD37%40ieee.org.
