test.m

用matlab设计FIR和IIR滤波器的设计函数与例程

fs=200;
gs=50;

M=fs/gs;
b=[1 zeros(1,M-1) -1];
w=2*pi*gs/fs;
a=[1 -2*cos(w) 1];
figure(1);
freqz(b,a,fs,'whole');
figure(2);
zplane(b,a);