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Altera_Forum
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15 years ago

Unwanted frequency shift in DA-converted signal

Hi, i use Matlab/Simulink and DSP Builder for my project. In Matlab, I generate a digital source signal and program it in a LUT-Block in Simulink. This Block then sends the data to my DACs...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

To demonstrate:

a1=sin(2*pi*(0:8189)*12.5/125);

a2=sin(2*pi*(0:8189)*2*12.5/125);

a3=sin(2*pi*(0:8189)*4*12.5/125);

a=a1+a2+a3; %scale for LUT

your LUT should run from 0 to 8189 only