Cascade of blind deconvolution and array invariant for robust source-range estimation

TitleCascade of blind deconvolution and array invariant for robust source-range estimation
Publication TypeJournal Article
Year of Publication2017
AuthorsSong H.C, Cho C, Byun G, Kim J.S
JournalThe Journal of the Acoustical Society of America
Volume141
Pagination3270-3273
Date Published2017/05
Keywordsacoustic arrays,acoustic radiators,acoustic waveguides,underwater sound
Abstract

The array invariant proposed for robust source localization in shallow water is based on the dispersion characteristics in ideal waveguides. It involves conventional plane-wave beamforming using a vertical array, exploiting multiple arrivals separated in beam angle and travel time, i.e., beam-time migration. The approach typically requires either a short pulse emitted by a source or the Green's function that can be estimated from a probe signal to resolve distinct multipath arrivals. In this letter, the array invariant method is extended to unknown source waveforms by extracting the Green's function via blind deconvolution. The cascade of blind deconvolution and array invariant for robust source-range estimation is demonstrated using a 16-element, 56-m long vertical array at various ranges (1.5–3.5 km) from a towed source broadcasting broadband communication waveforms (0.5–2 kHz) in approximately 100-m deep shallow water.

DOI10.1121/1.4983303
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