Sparse Active Rectangular Array with Few Closely Spaced Elements

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2018
Major/Subject
Mcode
Degree programme
Language
en
Pages
1820-1824
Series
IEEE Signal Processing Letters, Volume 25, issue 12
Abstract
Sparse sensor arrays offer a cost effective alternative to uniform arrays. By utilizing the co-array, a sparse array can match the performance of a filled array, despite having significantly fewer sensors. However, even sparse arrays can have many closely spaced elements, which may deteriorate the array performance in the presence of mutual coupling. This paper proposes a novel sparse planar array configuration with few unit inter-element spacings. This Concentric Rectangular Array (CRA) is designed for active sensing tasks, such as microwave or ultrasound imaging, in which the same elements are used for both transmission and reception. The properties of the CRA are compared to two well-known sparse geometries: the Boundary Array and the Minimum-Redundancy Array (MRA). Numerical searches reveal that the CRA is the MRA with the fewest unit element displacements for certain array dimensions.
Description
Keywords
Array signal processing, Imaging, Mutual coupling, mutual coupling, Phased arrays, Planar arrays, Sensor arrays, Sparse array, sum co-array
Other note
Citation
Rajamäki, R & Koivunen, V 2018, ' Sparse Active Rectangular Array with Few Closely Spaced Elements ', IEEE Signal Processing Letters, vol. 25, no. 12, pp. 1820-1824 . https://doi.org/10.1109/LSP.2018.2876066