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Altera_Forum
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15 years ago

FIR II Compiler V10.1 Coefficient Scaling

Hye all, I'm implementing a 127-taps FIR for baseband shaping. I'm using the FIRII compiler for it. I noticed that in the 'old' FIR compiler you had the option to scale the coefficients ...
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Altera_Forum
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14 years ago

To get dc unity gain, you scale your coeffs as follows:

coeff = round(2^n/sum(coeffs));

in your case, you easily work around by rescaling your normalised coeffs so that your max coeff = sum of coeffs.

what remains is the difference of 2^n & 2^n - 1 which is trivial.