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
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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 o ers 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 nding
of the proposed array grid over a single ring array geometry termed as uniform circular array
(UCA) is hereby analytically veri ed 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.
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Keywords
Antenna arrays, array signal processing, direction-of-arrival estimation, parameter estimation, planar circular arrays
Citation
Journal of Advances in Mathematics and Computer Science 32(3): 1-20,