matlab program for crosscorrelation crosscorrelation using matlab

% CROSS CORRELATION
clear all;
x = input('enter first sequence x=');
h = input('enter second sequence =');
N1=length(x);
N2=length(h);
m=0:N1-1;
k=0:N2-1;
N= max(N1,N2);
x =[x zeros(1,N-N1)];
h =[h zeros(1,N-N2)];

  if (N1>N2)
 p=x;x=h;h=p;     %for swapping since first term should be smaller so swapping smaller with biger one
  end 
 z=x;
 for i=1:N-1       
     for i=N-1:-1:1
       x(i+1)=x(i);      %rotating
     end;
    x(1)=0;              %assigning zero
    z=[z; x];            %concatenating matrices
end;
m=[z]*[h'];                  %cross-correlation
m=m/N;
disp(z);
disp(h);
disp(m);
stem(m);
title('cross-correlation')
xlabel('time index=');
ylabel('amplitude =');

input
enter first sequence x=[1 2 3 4 ]
enter second sequence =[1 2 3 4 5]

output

 

tags:matlab program for correlation matlab code for cross correlation