Estimating directions of arrival of completely and incompletely polarized signals with electromagnetic vector sensors

We develop two high-resolution methods for direction-ofarrival estimation with electromagnetic vector sensors (i.e., sensors that provide measurements of the complete electric and magnetic Uriels at one point). Both methods (the first of which is ESPRIT based and the second MUSIC based) are applicable to scenarios where both completely and incompletely polarized signals coexist. The ESPRIT-based method is computationally efficient, but there must be three vector sensors with a specific sensor arrangement in order to apply the method. On the other hand, the MUSIC-based method, although it involves more computations, can work without the constraint that the ESPRIT-based method faces. In addition, neither method requires a priori information about the numbers of completely and incompletely polarized signals impinging on the array and will inherently provide such information.