Patent ID: 7242350

Claim:
A method for estimating an angle-of-arrival of a signal, comprising: receiving a signal sent from an emitter, the signal detected by a singly polarized antenna system associated with an antenna response model, the emitter located within a region; generating an autocorrelation matrix in response to the signal, the autocorrelation matrix associated with a plurality of eigenvectors, the plurality of eigenvectors comprising a plurality of noise-related eigenvectors; determining one or more polarization ratios from one or more projections, a polarization ratio comprising a ratio of polarization values, a polarization value comprising a complex scalar component of a polarization vector, a projection referring to a projection of a noise-related eigenvector onto the antenna response model; establishing a minimum polarization ratio variance for the one or more polarization ratios, the minimum polarization ratio variance describing a minimum variance of the polarization ratios over the region; identifying a polarization vector corresponding to the minimum polarization ratio variance; and estimating an angle-of-arrival of the signal in accordance with the identified polarization vector.