UCA-ESPRIT is a recently developed closed-form algorithm for use in conjunction with a uniform circular array (UCA) that provides automatically paired source azimuth and elevation angle estimates. 2-0 unitary ESPRIT is presented as an algorithm providing the same capabilities for a uniform rectangular array (URA). In the final stage of the algorithm, the real and imaginary parts of the ith eigenvalue of a matrix are oneto-one related to the respective direction cosines of the ith source relative to the two major array axes. 2-D u n h y ESPRIT offers a number of advantages over other recently proposed ESPRIT based closed-form 2-D angle estimation techniques. First, except for the final eigenvalue decomposition of dimension equal to the number of sources, it is efficiently formulated in terms of realvalued computation throughout. Second, it is amenable to efficient beamspace implementations that w i l l be presented. Third, it is applicable to array configurations that do not exhibit identical subarrays, e. g., two orthogonal linear arrays. Finally, 2-D u n h y ESPRZT easily handles sources having one member of the spatial frequency coordinate pair in common. Simulation results are presented verifying the efficacy of the method.
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