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.
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December 2018
December 27 2018
Ray-based blind deconvolution of shipping sources using multiple beams separated by alternating projection
Sung-Hoon Byun;
Sung-Hoon Byun
a)
1
Korea Research Institute of Ships and Ocean Engineering
, Daejeon, 34103, Republic of Korea
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Gihoon Byun;
Gihoon Byun
2
Scripps Institution of Oceanography
, La Jolla, California 92093-0238, USA
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Karim G. Sabra
Karim G. Sabra
3
Georgia Institute of Technology
, 801 Ferst Drive, Atlanta, Georgia 30332-0405, USA
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a)
Electronic mail: byunsh@kriso.re.kr
J. Acoust. Soc. Am. 144, 3525–3532 (2018)
Article history
Received:
July 07 2018
Accepted:
November 26 2018
Citation
Sung-Hoon Byun, Gihoon Byun, Karim G. Sabra; Ray-based blind deconvolution of shipping sources using multiple beams separated by alternating projection. J. Acoust. Soc. Am. 1 December 2018; 144 (6): 3525–3532. https://doi.org/10.1121/1.5083834
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