DSP EXP 5

EXP NO 5

TITLE: TO PLOT POLES AND ZEROES AND STUDY STABILITY OF DIFFERENT TRANSFER FUNCTION

%FOR STABLE

clc;

clear all;

close all;

b=[1 0];

a=[1 0.5];

h=impz(b,a);

stem(h);

[z p]=tf2zp(b,a);

if(abs(p)<1)

disp('system is stable');

elseif(abs(p)>1)

disp('system is unstable');

else

disp('system is marginally stable');

end;

%FOR NONSTABLE

clc;

clear all;

close all;

b=[1 0];

a=[1 -2];

h=impz(b,a);

stem(h);

[z p]=tf2zp(b,a);

if(abs(p)<1)

disp('system is stable');

elseif(abs(p)>1)

disp('system is unstable');

else

disp('system is marginally stable');

end;

%FOR MARGINALY STABLE

clc;

clear all;

close all;

b=[1 0];

a=[1 1];

h=impz(b,a);

stem(h);

[z p]=tf2zp(b,a);

if(abs(p)<1)

disp('system is stable');

elseif(abs(p)>1)

disp('system is unstable');

else

disp('system is marginally stable');

end;