Periodic extension phase unwrapping for direction-of-arrival estimation using sparse undersampled arrays: Method and field validation.
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| Title: | Periodic extension phase unwrapping for direction-of-arrival estimation using sparse undersampled arrays: Method and field validation. |
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| Authors: | Ma, Wei1 (AUTHOR), Tian, Chuan2 (AUTHOR), Lyu, Chengcai2 (AUTHOR), Li, Jianlong1,3 (AUTHOR) jlli@zju.edu.cn |
| Source: | Journal of the Acoustical Society of America. May2026, Vol. 159 Issue 5, p4752-4770. 19p. |
| Subjects: | Direction of arrival estimation, Phase unwrapping (Digital image processing), Acoustic signal processing, Underwater acoustics, Multipath channels, Sensor arrays, Field research |
| Abstract: | To address spatial aliasing and phase ambiguity in broadband direction-of-arrival (DOA) estimation for sparse, spatially undersampled underwater acoustic arrays, this paper presents periodic extension phase unwrapping (PEPU). PEPU first extends the wrapped cross-spectral phase within the physical bound imposed by the interelement-spacing-to-wavelength ratio, thereby constructing a candidate phase space containing the admissible ambiguity orders. It then extracts the dominant phase trajectory from this candidate space using local phase smoothness for initialization and cross-frequency continuity for trajectory selection. By screening candidate trajectories globally rather than linking neighboring points locally, PEPU suppresses isolated low-coherence anomalies caused by multipath propagation or interference nulls and delivers continuous absolute phase for a conventional DOA inversion stage. Results from two sea trials conducted in the South China Sea indicate that the method reduces the influence of anomalous frequency bins associated with multipath propagation, localized coherence collapse, and nonstationary disturbances, thereby improving the stability of broadband phase unwrapping for large-spacing arrays and providing reliable phase input for ambiguity-free DOA estimation. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of the Acoustical Society of America is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
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| Header | DbId: egs DbLabel: Engineering Source An: 194178314 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Periodic extension phase unwrapping for direction-of-arrival estimation using sparse undersampled arrays: Method and field validation. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Ma%2C+Wei%22">Ma, Wei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tian%2C+Chuan%22">Tian, Chuan</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lyu%2C+Chengcai%22">Lyu, Chengcai</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Jianlong%22">Li, Jianlong</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> jlli@zju.edu.cn</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+the+Acoustical+Society+of+America%22">Journal of the Acoustical Society of America</searchLink>. May2026, Vol. 159 Issue 5, p4752-4770. 19p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Direction+of+arrival+estimation%22">Direction of arrival estimation</searchLink><br /><searchLink fieldCode="DE" term="%22Phase+unwrapping+%28Digital+image+processing%29%22">Phase unwrapping (Digital image processing)</searchLink><br /><searchLink fieldCode="DE" term="%22Acoustic+signal+processing%22">Acoustic signal processing</searchLink><br /><searchLink fieldCode="DE" term="%22Underwater+acoustics%22">Underwater acoustics</searchLink><br /><searchLink fieldCode="DE" term="%22Multipath+channels%22">Multipath channels</searchLink><br /><searchLink fieldCode="DE" term="%22Sensor+arrays%22">Sensor arrays</searchLink><br /><searchLink fieldCode="DE" term="%22Field+research%22">Field research</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: To address spatial aliasing and phase ambiguity in broadband direction-of-arrival (DOA) estimation for sparse, spatially undersampled underwater acoustic arrays, this paper presents periodic extension phase unwrapping (PEPU). PEPU first extends the wrapped cross-spectral phase within the physical bound imposed by the interelement-spacing-to-wavelength ratio, thereby constructing a candidate phase space containing the admissible ambiguity orders. It then extracts the dominant phase trajectory from this candidate space using local phase smoothness for initialization and cross-frequency continuity for trajectory selection. By screening candidate trajectories globally rather than linking neighboring points locally, PEPU suppresses isolated low-coherence anomalies caused by multipath propagation or interference nulls and delivers continuous absolute phase for a conventional DOA inversion stage. Results from two sea trials conducted in the South China Sea indicate that the method reduces the influence of anomalous frequency bins associated with multipath propagation, localized coherence collapse, and nonstationary disturbances, thereby improving the stability of broadband phase unwrapping for large-spacing arrays and providing reliable phase input for ambiguity-free DOA estimation. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of the Acoustical Society of America is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1121/10.0043881 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 19 StartPage: 4752 Subjects: – SubjectFull: Direction of arrival estimation Type: general – SubjectFull: Phase unwrapping (Digital image processing) Type: general – SubjectFull: Acoustic signal processing Type: general – SubjectFull: Underwater acoustics Type: general – SubjectFull: Multipath channels Type: general – SubjectFull: Sensor arrays Type: general – SubjectFull: Field research Type: general Titles: – TitleFull: Periodic extension phase unwrapping for direction-of-arrival estimation using sparse undersampled arrays: Method and field validation. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Ma, Wei – PersonEntity: Name: NameFull: Tian, Chuan – PersonEntity: Name: NameFull: Lyu, Chengcai – PersonEntity: Name: NameFull: Li, Jianlong IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 00014966 Numbering: – Type: volume Value: 159 – Type: issue Value: 5 Titles: – TitleFull: Journal of the Acoustical Society of America Type: main |
| ResultId | 1 |
