FCA-ESPRIT: A closed-form 2-D angle estimation algorithm for filled circular arrays with arbitrary sampling lattices

Department

Electrical and Computer Engineering

Document Type

Article

Publication Title

IEEE Transactions on Signal Processing

ISSN

1053-587X

Volume

47

Issue

1

DOI

10.1109/78.738255

First Page

213

Last Page

217

Publication Date

12-1-1999

Abstract

This correspondence addresses the simultaneous estimation of the azimuth and elevation angles of multiple co-channel signals incident upon an array of antennas. A new closed-form algorithm that is applicable with filled circular arrays (FCA's) is presented. The algorithm, which is called FCA-ESPRIT, is applicable with any FCA geometry, e.g., FCA's constructed using rectangular, hexagonal, polar, or random sampling lattices. The only constraint imposed on the FCA geometry is that the spacing between adjacent sensors should be half a wavelength or less on average across the entire aperture. The algorithm provides automatically paired azimuth and elevation angle estimates by solving a set of ESPRITlike equations wherein the unknowns have the form sin(0;)ej''>' (where H. and <->. are the elevation and azimuth angles of the /lh source, respectively). The algorithm provides arrival angle estimates via a closedform procedure-it does not require computationally expensive search or optimization procedures. © 1999 IEEE.

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