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Altera_Forum's avatar
Altera_Forum
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15 years ago

basic (stupid ?) filtering questions

Hi all, I.m playing with a self-made FIR filter (no fir compiler used). I have read the theory, but the devil is in the implementation, as they say :-P my ADC generates 8 bits values [...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

most DSP is done in 2's compliment, i would convert the ADC and DAC. that said i think it could be done in BCD, you won't find much reference material

building a FIR by hand is a great learning experience and handy for when you run into something that the off the shelf IP does not support, but i had trouble meeting (let alone beating) FIR Compiler II's fmax and resource usage. and when the specs changed it took seconds to redo the filter instead of going back and analyzing which coefficients to put in fabric, etc