?? ex_06_03_2.m
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% ex_06_03_2.m : 習(xí)題 6.3
clear all
fp=400;
fs=300;
Fs=1000;
rp=3;
rs=35;
wp=2*fp/Fs;
ws=2*fs/Fs;
%
[nz,wn]=cheb1ord(wp,ws,rp,rs);
[bz,az]=cheby1(nz,rp,wp,'high')
[h,w]=freqz(bz,az,128,Fs);
subplot(211)
plot(w,20*log10(abs(h)));grid;
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