Method and apparatus for all-polarization direction finding

Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver

Reexamination Certificate

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C342S362000, C342S432000

Reexamination Certificate

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07414582

ABSTRACT:
Embodiments of the present invention provide a method and apparatus for all-polarization direction finding. The method and apparatus generally include acquiring measurements at least partially corresponding to an emitted signal and generated utilizing a blind signal extraction algorithm, forming an all-polarization cost function utilizing the acquired measurements, and determining an angle of arrival for the emitted signal utilizing the formed all-polarization cost function. Such a configuration enables angles of arrivals to be easily determined for signals having any polarization without using a multiple signal classification (MUSIC) algorithm.

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patent: 6140963 (2000-10-01), Azzarelli et al.
patent: 7268728 (2007-09-01), Struckman
A.J. Weiss et al., Manifold interpolation for diversely polarised arrays, IEE Proceedings of Radar Sonar and Navigation, vol. 141(1), p. 19-24, Feb. 1994.
Ralph O. Schmidt,Multilinear Array Manifold Interpolation, IEEE Transactions On Signal Processing, vol. 40, No. 4, Apr. 1992, at 857.
Brian G. Agee,The Copy/DF Approach to Signal-Specific Emitter Location, IEEE, 1991, at 994.
Brian G. Agee and Robert A. Calabretta,ARMA-Like and ML-Like Copy/DF Approaches for Signal-Specific Emitter Location, IEEE, 1990, at 134.

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