ex07010.m

数字信号处理（机械工业出版社）的源码

% Chapter 7: Example 7.10 filter design
%
Wp = 40/500; Ws = 150/500;
Rp = 3; Rs = 60;
[n,Wn] = cheb1ord(Wp,Ws,Rp,Rs)
[b,a] = cheby1(n,Rp,Wn);
freqz(b,a,512,1000); 
title('n=4 Chebyshev Type I Lowpass Filter')