📄 cas2dir.m
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function [b,a] = cas2dir(b0,B,A);% CASCADE-to-DIRECT form conversion% ---------------------------------% [b,a] = cas2dir(b0,B,A)% b = numerator polynomial coefficients of DIRECT form% a = denominator polynomial coefficients of DIRECT form% b0 = gain coefficient% B = K by 3 matrix of real coefficients containing bk's% A = K by 3 matrix of real coefficients containing ak's%[K,L] = size(B);b = [1];a = [1];for i=1:1:K b=conv(b,B(i,:)); a=conv(a,A(i,:));endb = b*b0;
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