📄 ex3011.m
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b=[0.0181,0.0543,0.0543,0.0181];
a=[1.0000,-1.7600,1.1829,-0.2781];
m=0:length(b)-1;
l=0:length(a)-1;
K=500;
k=1:1:K;
w=pi*k/K;
num=b*exp(-j*m'*w);
den=a*exp(-j*l'*w);
H=num./den;
magH=abs(H);
angH=angle(H);
subplot(211)
plot(w/pi,magH)
subplot(212)
plot(w/pi,angH/pi*180)
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