Aperture Maximization with Half-Wavelength Spacing, via a 2-Circle Concentric Array Geometry that is Uniform but Sparse

Main Article Content

Musyoka Kinyili
Dominic Makaa Kitavi
Cyrus Gitonga Ngari

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 oers 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 veried via Cramer-Rao bound analysis. Further, the authors demonstrate that the proposed sensor-array geometry has better estimation accuracy than a single ring array.

Keywords:
Antenna arrays, array signal processing, direction-of-arrival estimation, parameter estimation, planar circular arrays

Article Details

How to Cite
Kinyili, M., Kitavi, D., & Ngari, C. (2019). Aperture Maximization with Half-Wavelength Spacing, via a 2-Circle Concentric Array Geometry that is Uniform but Sparse. Journal of Advances in Mathematics and Computer Science, 32(3), 1-20. https://doi.org/10.9734/jamcs/2019/v32i330148
Section
Original Research Article

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