Off-Eccentricity in a Multi-Ring Planar Array – Improving the Cramér-Rao Bound for Azimuth-Elevation Direction Finding | Zendy

Dominic Makaa Kitavi | Zendy; Kainam Thomas Wong | Zendy; Yue Ivan Wu | Zendy; Charles Hung Lee | Zendy

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Off-Eccentricity in a Multi-Ring Planar Array – Improving the Cramér-Rao Bound for Azimuth-Elevation Direction Finding

Author(s) -

Dominic Makaa Kitavi,

Kainam Thomas Wong,

Yue Ivan Wu,

Charles Hung Lee

Publication year - 2025

Publication title -

ieee access

Language(s) - English

Resource type - Magazines

SCImago Journal Rank - 0.587

H-Index - 127

eISSN - 2169-3536

DOI - 10.1109/access.2025.3597782

Subject(s) - aerospace , bioengineering , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , engineering profession , fields, waves and electromagnetics , general topics for engineers , geoscience , nuclear engineering , photonics and electrooptics , power, energy and industry applications , robotics and control systems , signal processing and analysis , transportation

This paper proposes an off-centric variation of the concentric circular array, which constitutes the most general planar array grid that offers azimuthal rotational symmetry for direction finding (with the ‘‘azimuth" defined on the circular plane). This off-centric variation improves direction-finding precision with out adding more sensors and with out enlarging the aperture size. These advantages are predicated on an astonishing insight uncovered in this paper that off -centering the rings’ origins will lower (i.e., improve) the overall array’s direction-finding Cramér-Rao bounds, which are analytically derived in this paper in mathematically closed forms.

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