Hi ACiDuser,
While I am not familiar with doing this personally, it seems like you should be able to manually implement some kind of algorithm based on the fact that frequency can be found by using some trigonometry with the I and Q data you retrieve. Finding the frequency is equivalent to differentiating the phase, and this phase can be found by simply taking the arctan of the product of the quadrature component ('Q') and the complex conjugate of the in-phase component ('I'). One good resource I came across when doing a quick search of software-defined radio can be found in this article. This article gives an explanation behind the algorithm used in the demodulation. I do not know of any existing algorithms implemented in LabVIEW beyond the Modulation Toolkit, though someone may have done this before. Hope this helps, and best of luck!
Daniel S.
National Instruments
