u_chb2ap.asv

来自「MATLAB信号处理扩展函数,用于信号处理的扩展函数」· ASV 代码 · 共 20 行

function [b,a]=u_chb2ap(N,As,Omegac);%非归一化Chebyshev 2 型低通滤波器源型设计
         [z,p,k]=cheb2ap(N,As);
                  a=real(poly(p));
                aNn=a(N+1);
                  p=p*Omegac;
                  a=real(poly(p));
                aNu=a(N+1);
                  b=real(poly(z));
                  M=length(b);
                bNn=b(M);
                  z=z*Omegac;
                  b=real(poly(z));
                bNn=b(M); 
                  k=k*(aNu*bNu)/(aN);
                
                k=k*aNu/aNn;
                  b0=k;
                b=real(poly(z));
                b=k*B;