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Altera_Forum
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17 years ago

Help with altera FFT

hello; what i want to do is to get spectrum of an sinusoidal signal using the altera fft core i have generated a v8 fft with the following setting: fft point : 64 (to start with) archi...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

Hi,

To avoid guess work you better compare results with matlab.

in matlab:

test = round(fftshift(fft(ROM_data));

test must equal your hardware fft(allowing for rounding variations)

You may use cos instead of sin since sin will give zero real.

you may also want to visulaise the spectrum of your output or matlab output by typing:

f = linspace(-.5,.5,64);

plot(f,abs(test))

or plot(f,abs(your fft output));