hello i have corralation of two complex signals each have diffrent length i use ippsCrossCorr_32fc
the issue is that i dont recive same result as matlab sig1 lenRecived sig2 len1 xcorrsig=xcorr(sig1,sig2) ( length = 2*lenrecived-1)
in intel i use xcorr = 2*lenRecived-1 since lenRecived>len1 and i use lag = -(lenRecived-1)
status = ippsCrossCorr_32fc(sigSigRecived,lenRecived , &sign[indD*N], N, &xcorrSig[indDlenRecived], 2*lenRecived-1 , lag); i dont recive the same result , also i have very old matlab version before 10 years
i try to change the order of signals in corralation and try to see mirror of result still not the same also i put two results at the maximal value and look to see if there is index problem but it isnt seem so ..
ok i have found the answer in diffrent matlab version it is diffrent definition
xcor(a,b) =~ filter(conj(a(end:-1:1)),b) in other matlab versions it might be filter(a,b) but only part of correlation is the same arround maximum so in intel ipp i suppose first vesrion should be invers order of signal and make conjugate