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+//Example 4.16

+

+clc;clear;close;

+z=poly(0,'z');

+x1=[1 2 3 4];n1=0:length(x1)-1;

+X1=x1*(z^-n1)';

+x2=[4 3 2 1];n2=0:length(x2)-1;

+X2=x2*(z^-n2)';

+X2_=x2*(z^n2)';

+X3=X1*X2_;

+l=coeff(numer(X3));

+x3=l(:,$:-1:1);

+disp(X1,'x1(n)={4,-2,1} X1(z)=');

+disp(X2,'x2(n)={4,-2,1} X2(z)=');

+disp(X3,'Z transform of cross crrelation of the two signals X3(z)=');

+disp(x3,'Cross correlation result of the two signals= ')