跑MATLAB程序,缺少函数,搜索整理如下:
dir2par
参考链接:https://github.com/sonientaegi/matlab/blob/master/DSP/dir2par.m
function [C,B,A] = dir2par(b,a)
% DIRECT-form to PARALLEL-form conversion
% --------------------------------------
% [C,B,A] = dir2par(b,a)
% C = Polynomial part when length(b) >= length(a)
% B = K by 2 matrix of real coefficients containing bk's
% A = K by 3 matrix of real coefficients containing ak's
% b = numerator polynomial coefficients of DIRECT form
% a = denominator polynomial coefficients of DIRECT form
%
M = length(b); N = length(a);
[r1,p1,C] = residuez(b,a);
p = cplxpair(p1,10000000*eps);
I = cplxcomp(p1,p);
r = r1(I);
K = floor(N/2); B = zeros(K,2); A = zeros(K,3);
if K*2 == N %N even, order of A(z) odd, one factor is first order
for i=1:2:N-2
Brow = r(i:1:i+1,:);
Arow = p(i:1:i+1,:);
[Brow,Arow] = residuez(Brow,Arow,[]);
B(fix((i+1)/2),:) = real(Brow');
A(fix((i+1)/2),:) = real(Arow');
end
[Brow,Arow] = residuez(r(N-1),p(N-1),[]);
B(K,:) = [real(Brow') 0]; A(K,:) = [real(Arow') 0];
else
for i=1:2:N-1
Brow = r(i:1:i+1,:);
Arow = p(i:1:i+1,:);
[Brow,Arow] = residuez(Brow,Arow,[]);
B(fix((i+1)/2),:) = real(Brow');
A(fix((i+1)/2),:) = real(Arow');
end
end
cplxcomp
参考链接:https://zhidao.baidu.com/question/135459467.html
function I=cplxcomp(p1,p2)
I=[];
for j=1:1:length(p2)
for i=1:1:length(p1)
if (abs(p1(i)-p2(j))<0.0001)
I=[I,i];
end
end
end
I=I';
end