Cross Correlation between two Digital Signals > Matlab

Cross Correlation between two Digital Signals > Matlab

Digital Signal Processing

%Cross Correlation

clear all

x=input('Enter x :');

y=input('Enter y :');

m=length(x);

n=length(y);

yi=fliplr(y);

X=[x,zeros(1,n)];

YI=[yi,zeros(1,m)];

for i=1:n+m-1

Z(i)=0;

for j=1:m

if(i-j+1>0)

Z(i)=Z(i)+X(j)*YI(i-j+1);

else

end

end

end

x

yi

Z

subplot(3,1,1);

stem(x);

title('First Signal');

subplot(3,1,2);

stem(yi);

title('Second Signal');

subplot(3,1,3);

stem(Z);

title('Cross Correlation of Two Signals');

% OUTPUT :

% Enter x :[0 1 2 3 4]

% Enter y :[1 2 3 4 5]

%

% x =

%

%      0     1     2     3     4

%

%

% yi =

%

%      5     4     3     2     1

%

%

% Z =

%

%      0     5    14    26    40    30    20    11     4

%