xcorr function doesnt change its max. even i delayed the signal

Hi, Iam trying to do some stuff about calculating the delay between two signals by using the difference between the two max.'s of the correlation functions that will be calculated so, i wrote a small code:

>> a=[ones(1,5),zeros(1,5),ones(1,5),zeros(1,5),ones(1,5),zeros(1,5)]; >> plot(a); >> plot(b); >> b=[zeros(1,26),ones(1,5),zeros(1,5),ones(1,5),zeros(1,5),ones(1,5),zeros(1,5)]; >> plot(b); >> c=[zeros(1,30),ones(1,5),zeros(1,5),ones(1,5),zeros(1,5),ones(1,5),zeros(1,5)]; >> plot(c); >> plot(xcorr(a,c)); >> plot(xcorr(a,b));

now xcorr(a,c) is the same of xcorr(a,b) despite of the predicted result of xcorr(a,c) is that it will be shifted by 3 from xcorr(a,b

PLZ, can any one help me in this ?

THNX for reading.

[Matt J]

Please apply the

formatting button to your code to make it readable.

Answer 1

[badr]

if true
 >> a=[ones(1,5),zeros(1,5),ones(1,5),zeros(1,5),ones(1,5),zeros(1,5)]; >> plot(a); >> plot(b); >> b=[zeros(1,26),ones(1,5),zeros(1,5),ones(1,5),zeros(1,5),ones(1,5),zeros(1,5)]; >> plot(b); >> c=[zeros(1,30),ones(1,5),zeros(1,5),ones(1,5),zeros(1,5),ones(1,5),zeros(1,5)]; >> plot(c); >> plot(xcorr(a,c)); >> plot(xcorr(a,b));
end

sorry for that

[Image Analyst]

You'd get more enthusiastic help if you made it easier for us, like don't have the if true stuff in there (you probably clicked {}Code before you pasted in the code instead of afterwards), and don't have >> and make it just commands like we can copy and paste into an m-file script.

Answer 2

[badr]

sorry i attached the .m file