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binfu1's avatar
binfu1
Icon for New Contributor rankNew Contributor
3 months ago

FFT Intel FPGA IP

When I use FFT Intel FPGA IP (version 19.1), the simulation results of fft is correct (compared with python calculate results). Then I assert inverse signal to calculate ifft, the results is incorrec...
CheepinC_altera's avatar
CheepinC_altera
Icon for Regular Contributor rankRegular Contributor
2 months ago

Hi,


Just to keep you posted—I’ve conducted a series of tests using both FFT IP v19.1 and the Unified FFT IP. It appears that the output from FFT IP v19.1 in inverse FFT mode is not as expected. However, when using the Unified FFT IP in inverse FFT mode, the output behaves as expected.


Based on this observation, as a workaround, you may proceed with your modification using the Variable Size FFT Intel FPGA IP. I’ll also share this feedback with Engineering for further investigation.


Apologies for any inconvenience caused, and thank you for your understanding.


Best regards,

Chee Pin


  • TKapi's avatar
    TKapi
    Icon for New Contributor rankNew Contributor
    19 days ago

    Dear Mr. Chee Pin,
    I use Max 10 and FFT IP (version 24.x and 25.1). FFT works good. But IFFT (Direction inverse) does not works - tt behaves as if the "inverse" was not set.
    Could this be the same problem?


    Unfortunately, I cannot use Unified FFT IP with Max 10.

    Thank you.