Aperture Maximization with Half-Wavelength Spacing, via a 2-Circle Concentric Array Geometry that is Uniform but Sparse
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Date
2019-05-25
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Advances in Mathematics and Computer Science
Abstract
This paper proposes a new sensor-array geometry (the 2-circle concentric array geometry),
that maximizes the array’s spatial aperture mainly for bivariate azimuth-polar resolution of
direction-of-arrival estimation problem. The proposed geometry provides almost invariant
azimuth angle coverage and offers the advantage of full rotational symmetry (circular invariance)
while maintaining an inter-sensor spacing of only an half wavelength (for non-ambiguity with
respect to the Cartesian direction cosines). A better-accurate performance in direction finding
of the proposed array grid over a single ring array geometry termed as uniform circular array
(UCA) is hereby analytically verified via Cram´er-Rao bound analysis. Further, the authors
demonstrate that the proposed sensor-array geometry has better estimation accuracy than a
single ring array.
Description
Article
Keywords
Antenna arrays, Array signal processing, Direction-of-arrival estimation, Parameter estimation, Planar circular arrays
Citation
32(3): 1-20, 2019; Article no.JAMCS.47041