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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 Kaz, thanks for your reply,

I'm doing an FFT and I choose to display the power spectrum to have an understandable output to compare.

I understood what you are saying.

(1) Calculate the power spectrum using the periodogram with Hann windowing

(2),(3) doesn't

I've used the classic method:

Sign --> FFT --> ( |RE|^2 + |Imm|^2 )/FFT_length --> frequency plot

The problem is in the 3d plot as I've sayed before.