Ray-based blind deconvolution of shipping sources using multiple beams separated by alternating projection

TitleRay-based blind deconvolution of shipping sources using multiple beams separated by alternating projection
Publication TypeJournal Article
Year of Publication2018
AuthorsByun S.H, Byun G., Sabra KG
JournalJournal of the Acoustical Society of America
Volume144
Pagination3525-3532
Date Published2018/12
Type of ArticleArticle
ISBN Number0001-4966
Accession NumberWOS:000454625000048
Keywordsacoustics; Audiology & Speech-Language Pathology; localization
Abstract

This article presents a method for improving the performance of the ray-based blind deconvolution (RBD) algorithm, which was first proposed by Sabra, Song, and Dowling [J. Acoust. Soc. Am. 127(2), EL42-EL47 (2010)]. In order to retrieve the channel impulse response (CIR), the original RBD algorithm uses the source signal phase from a selected single beam output. However, when the impinging multipath signals have low coherence, the channel estimate from a selected beam may not show all paths correctly. In this research, the maximum likelihood estimator, which is called the alternating projection, is applied to separate multipath signals. Then the multiple CIRs obtained from those separated signals are coherently combined. This results in more robust detection of existing multipaths. The performance of the proposed method is verified using Noise09 sea experiment data, where the proposed method better resolves the multipath arrival structure. (C) 2018 Acoustical Society of America.

DOI10.1121/1.5083834
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