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//EXAMPLE 7.6
//FIR Trasnfer functions with different Phase.
clc;
clear;
z = %z;
W = 0:(1/400):1;
z = exp(%i*2*%pi*W);
for i=1:401
H1z(i)= -1+ 2/z(i) - 3/(z(i)^2) + 6/(z(i)^3) -3/(z(i)^4) +2/(z(i)^5) -1/z(i)^(6);
end
H1z_phase = phasemag(H1z);
clf();
figure(0);
plot2d(W/(2*%pi),H1z_phase,1);
xtitle('phase response','W/(2*%pi)','H2z_phase in degrees');
for i=1:401
H2z(i)= +1 - 2/z(i) + 3/(z(i)^2) - 6/(z(i)^3) + 3/(z(i)^4) - 2/(z(i)^5) + 1/z(i)^(6);
end
H2z_phase = phasemag(H2z);
plot2d(W/(2*%pi),H2z_phase,2);
xtitle('phase response','W/(2*%pi)','H2z_phase in degrees');
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