example8_11.m

来自「原名：数字信号处理基础及MATLAB实现,解压缩密码：lfjk2002@163.」· M 代码 · 共 8 行

%例8-11程序:example8_11
Wp=0.2*pi;Ws=0.3*pi;Rp=1;Ar=15; T=1;    %数字滤波器设计指标
OmegaP=(2/T)*tan(Wp/2);                 %频率转换
OmegaS=(2/T)*tan(Ws/2); 
[N, Wn] = buttord (OmegaP, OmegaS, Rp, Ar,'s')
wn=Wn/pi;
[b,a] = butter (N,wn);
[C,B,A]=dir2cas(b,a)