Phase delay direction finding

Hello,

I’m trying to implement the calculation of phase delay using a routine
of
direction finding. I have two daugtherboards lfrx in a USRP at 25MHz and
I
intend to put the subdevice rxab in order to receive a stream complex in
each daugtherboards. In each of daugtherboard will be placed an
omnidirectional antenna with band of 20-1300MHz.

The question is: is possible to obtain the phase delay making a stream
by
multiplying the complex conjugate of the other stream and taking the
arctan?

Thanks
Pierry Reinaldo