www.pudn.com > MATLAB.rar > exa070500_3.m
>----------------------------------------------------------------------------
> exa070500_3.m, for fig. 7.5.6
>----------------------------------------------------------------------------
clear all;
> 梳状滤波器的频率响应和极零图；
M=4096;
rn1=0.96;rd1=0.98;
rn2=0.98;rd2=0.96;
b=[1 0 0 0 0 0 0 0 -rn1];
a=[1 0 0 0 0 0 0 0 -rd1];
[h,f]=freqz(b,a,M*4,'whole',1);
subplot(221)
plot(f,abs(h));grid;
b=[1 0 0 0 0 0 0 0 -rn2];
a=[1 0 0 0 0 0 0 0 -rd2];
[h,f]=freqz(b,a,M*4,'whole',1);
subplot(222)
plot(f,abs(h));grid;