Angle estimation using a polarization sensitive array

In a previous work (see ibid., vol.39, no.9, p.1376-83, 1991) the authors described how the ESPRIT algorithm may be used to estimate both the arrival directions and the polarizations of incoming plane waves with a uniform linear array of crossed dipoles. An alternative approach that may be used with the same array to estimate arrival angles only is described. This approach has the advantage that it requires far fewer computations. The performance of this approach is compared with that of the original approach and with that of estimators using conventional ESPRIT arrays