complex auto correlation using MKL

Lingzi_P_ — Wed, 15 Jun 2016 17:28:01 GMT

I am trying to use MKL for autocorrelation of complex vectors XX:

complex(kind=4),allocatable,dimension(:) :: XX, CXX

COMPLEX(kind=4),allocatable,dimension(:) :: CRXX

.......

! Do the 1 dimensional complex autocorrelation.
status = vslccorrnewtask1d(task, VSL_CORR_MODE_FFT, NZONE, NZONE, NZONE)
status = vslccorrexec1d(task, XX, 1, XX, 1, CRXX, 1)

I have a very naive implementation of auto correlation with complex numbers which I used to verify the result of MKL's implementation. And it suggest that the result is incorrect. The only way I can make it work is to pass conjugate of XX instead of XX as the second input vector. This doesn't make too much sense to me and also the result seems to be scaled by 2.

Appreciate if some one can point out what I have done wrong in the above code and how can I get correct result?

Regards,

we would recommend you have a

Gennady_F_Intel — Thu, 16 Jun 2016 04:22:24 GMT

we would recommend you have a look at the vslcCorrExec1D example - vslccorrexec1d.f ( mklroot\examples\vslf\source directory) which shows how properly call this function

topic we would recommend you have a in Intel® oneAPI Math Kernel Library

complex auto correlation using MKL

we would recommend you have a