Tom
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Erstellt: 24.10.06, 15:32 Betreff: VDHL FFT, ISE Coregen - strange simulation values |
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Hi all,
I am currently testing a Xilinx coregen 256-FFT (piplined one) in Modelsim. I tested descrete sine and pseudo random noise at input side- values in frequency domain come out very strange. For sine should be one peak but I receive many peaks. For noise there should be nothing but there are also many peaks. Of course I was aware of the twos complement values but it doesn't seem to work... What could be wrong?
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