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High-resolution sound source localization via non-synchronous measurements based on symmetric sparse planar array in the differential domain.

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Title: High-resolution sound source localization via non-synchronous measurements based on symmetric sparse planar array in the differential domain.
Authors: Lv, Dong1 (AUTHOR) dong.lv2024@stu.hebut.edu.cn, Feng, Guojin1 (AUTHOR) G.Feng@hebut.edu.cn, Zhen, Dong1,2 (AUTHOR) D.Zhen@hebut.edu.cn, Sun, Guohua3 (AUTHOR) sunguohua@maili.ioa.ac.cn, Tang, Weijie4 (AUTHOR) weijie.tang@hud.ac.uk, Gu, Fengshou4 (AUTHOR) F.Gu@hud.ac.uk
Source: ISA Transactions. Sep2026, Vol. 176, p604-626. 23p.
Subjects: Array processing, Acoustic localization, Matrices (Mathematics)
Abstract: To overcome the resolution limitations of conventional array topologies and non-synchronous measurement (NSM), the extended symmetric coprime and symmetric nested planar arrays with high-performance difference co-array are designed. A localization method of NSM based on symmetric sparse planar array (NSM-SSPA) is proposed that maps physical signals to equivalent difference co-array signals and completes a large cross-spectral matrix in the differential domain to greatly improve localization performance. Simulations demonstrate that the NSM-SSPA significantly enhances resolution across various frequencies and signal-to-noise ratios compared to uniform arrays. Experiments verify that this method achieves high-resolution imaging of two adjacent faulty bearings, maintaining root mean square error within 0.1 m at different rotational speeds. This fusion framework of topology and NSM provides a reliable solution for abnormal source localization. [Display omitted] • The symmetric topologies with a high-performing difference co-array were designed. • A symmetric sparse planar array-based non-synchronous measurement model was derived. • The advantage of the method was verified by simulations under different conditions. • Experiments on faulty bearings achieved high-resolution imaging of abnormal sources. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:To overcome the resolution limitations of conventional array topologies and non-synchronous measurement (NSM), the extended symmetric coprime and symmetric nested planar arrays with high-performance difference co-array are designed. A localization method of NSM based on symmetric sparse planar array (NSM-SSPA) is proposed that maps physical signals to equivalent difference co-array signals and completes a large cross-spectral matrix in the differential domain to greatly improve localization performance. Simulations demonstrate that the NSM-SSPA significantly enhances resolution across various frequencies and signal-to-noise ratios compared to uniform arrays. Experiments verify that this method achieves high-resolution imaging of two adjacent faulty bearings, maintaining root mean square error within 0.1 m at different rotational speeds. This fusion framework of topology and NSM provides a reliable solution for abnormal source localization. [Display omitted] • The symmetric topologies with a high-performing difference co-array were designed. • A symmetric sparse planar array-based non-synchronous measurement model was derived. • The advantage of the method was verified by simulations under different conditions. • Experiments on faulty bearings achieved high-resolution imaging of abnormal sources. [ABSTRACT FROM AUTHOR]
ISSN:00190578
DOI:10.1016/j.isatra.2026.05.017