u_buttap.m

MATLAB信号处理扩展函数,用于信号处理的扩展函数

function [b,a]=u_buttap(N,Omegac);%非归一化Butterworth模拟低通滤波器原型设计
         [z,p,k]=buttap(N);
         p=p*Omegac;
         k=k*Omegac^N;
         B=real(poly(z));
         b0=k;
         b=k*B;
         a=real(poly(p));