exa4_23.m

matlab应用实例。如：FIR、IIR数字滤波器设计等。

% exa4-23_invfreqz.m , for example 4-23
% Design Steiglitz-McBride DF

clear all;
[b,a] = butter(5,0.2)
[h,w] = freqz(b,a,64);
[bv,av] = invfreqz(h,w,5,5)