ex07014.m

来自「数字信号处理（机械工业出版社）的源码」· M 代码 · 共 7 行

% Chapter 7: Example 7.14 filter design
%
Wp = 40/500; Ws = 150/500;
Rp = 3; Rs = 60;
[n,Wn] = cheb2ord(Wp,Ws,Rp,Rs)
[b,a] = cheby2(n,Rs,Wn);
freqz(b,a,512,1000); title('n=4 Chebyshev Type II Lowpass Filter')