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Altera_Forum's avatar
Altera_Forum
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17 years ago

Filter Design using DSP Builder

Hi, I tried to implement a filter design with the following equation: y(n) = -0.5y(n-2) - 0.25y(n-3) + x(n) using DSP builder which i attached the model file with this post. and when ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

I don't have time to access your model, but perhaps you are not using enough resolution... Try increasing your resolution of your filter. Keep in mind that MATLAB's filter function is implemented in floating point and the filter you implemented in DSP Builder is in fixed point notation. You might need to increase your filter and your input resolution to get a comparable results.