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Altera_Forum's avatar
Altera_Forum
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16 years ago

A FFT bug?

hi all, Thank you for answering or reading I got a very very odd simulation results from modelsim for FFT V9. First of all, FFT v9(evaluation) doesn't provide post simulation model...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

I found another interesting result.

I use a same 64 points input repeat 2 times (64 x 2), the first output (64 point) from fft is incorrect, but the second one is correct.

Also 64x3 run and 64x4 run, all correct but the first 64 points output from FFT. anybody know why?