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Altera_Forum
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17 years ago

Matlab FFT Vs. DSP Builder FFT

I'v posted a thread in this section, maybe I was wrong, please check it at the following link http://www.alteraforum.com/forum/showthread.php?t=1654&highlight=dsp+fft (http://www.alteraforum.co...
Altera_Forum's avatar
Altera_Forum
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17 years ago

Hi,

Just a basic question and thought...

are you doing fft or PSD(power spectrm density).

I haven't done simulink for years but it seems you are doing (fft) in (1) but possibly a sort of spectrum density on (2,3).

I have used an old altera fft core(not DSPBuilder-based) and it was producing

fft.

compare the matlab functions fft & periodogram. These are two different things.

fft doesn't use any windowing, periodogram does...

Kaz