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Altera_Forum
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16 years ago

FIR Compiler 9.1 generate incorrect outputs

Hi, I created a simple simulink model using DSP builder 9.1 sp1 blocks. The model runs at 120Mhz with 20.02Mhz input signal. After generating 20Mhz cos and sin signals from NCO block, the...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Unfortunately I couldn't open your files.

If you want to do fft in Matlab on your vectors then:

IQ = complex(I,Q);

f = linspace(-60,60,length(IQ));

plot(f,20*log10(abs(fftshift(fft(IQ)))));