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+//Example 6.36

+

+clc;clear;close;

+x=[1 0 0 1];

+h=[4 3 2 1];

+ylength=length(x)+length(h)-1;

+xlength=length(x);

+x=[zeros(1,length(h)-1) x zeros(1,length(h)-1)];

+y=0;

+//Calculation of cross correlation

+for n=1:ylength;

+    y(n)=x*[zeros(1,n-1) h zeros(1,ylength-n)]';           //this instruction performs cross correlation of x & h

+end                                 

+

+disp(x,'First Sequence is x(n): ');

+disp(h,'Second Sequence is h(n): ');

+disp(y,'Correlation Sequence y[n] is');

+figure;

+subplot(3,1,1);

+plot2d3(x);

+title('First Seqence x[n]:');ylabel('Amplitude-->');xlabel('n-->')

+subplot(3,1,2);

+plot2d3(h);

+title('Second Seqence h[n]:');ylabel('Amplitude-->');xlabel('n-->')

+subplot(3,1,3);

+plot2d3(y);

+title('Correlation Seqence y[n]:');ylabel('Amplitude-->');xlabel('n-->')

+