Multi-frequency sparse Bayesian learning for robust matched field processing

TitleMulti-frequency sparse Bayesian learning for robust matched field processing
Publication TypeJournal Article
Year of Publication2017
AuthorsGemba K.L, Nannuru S., Gerstoft P, Hodgkiss WS
JournalJournal of the Acoustical Society of America
Date Published2017/05
Type of ArticleArticle
ISBN Number0001-4966
Accession NumberWOS:000403270600053
Keywordsapproximation; arrays; geoacoustic inversion; location; multiple; shallow-water; source localization

The multi-snapshot, multi-frequency sparse Bayesian learning (SBL) processor is derived and its performance compared to the Bartlett, minimum variance distortionless response, and white noise constraint processors for the matched field processing application. The two-source model and data scenario of interest includes realistic mismatch implemented in the form of array tilt and data snapshots not exactly corresponding to the range-depth grid of the replica vectors. Results demonstrate that SBL behaves similar to an adaptive processor when localizing a weaker source in the presence of a stronger source, is robust to mismatch, and exhibits improved localization performance when compared to the other processors. Unlike the basis or matching pursuit methods, SBL automatically determines sparsity and its solution can be interpreted as an ambiguity surface. Because of its computational efficiency and performance, SBL is practical for applications requiring adaptive and robust processing. (C) 2017 Acoustical Society of America.

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