Performance bounds on matched-field methods for source localization and estimation of ocean environmental parameters
Thesis (Ph. D.)--Joint Program in Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Ocean Engineering and the Woods Hole Oceanographic Institution), 2001.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2014
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| Online Access: | http://hdl.handle.net/1721.1/91333 |
| _version_ | 1811084472417779712 |
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| author | Xu, Wen, 1967- |
| author2 | Arthur B. Baggeroer. |
| author_facet | Arthur B. Baggeroer. Xu, Wen, 1967- |
| author_sort | Xu, Wen, 1967- |
| collection | MIT |
| description | Thesis (Ph. D.)--Joint Program in Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Ocean Engineering and the Woods Hole Oceanographic Institution), 2001. |
| first_indexed | 2024-09-23T12:51:20Z |
| format | Thesis |
| id | mit-1721.1/91333 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T12:51:20Z |
| publishDate | 2014 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/913332022-01-11T21:15:49Z Performance bounds on matched-field methods for source localization and estimation of ocean environmental parameters Xu, Wen, 1967- Arthur B. Baggeroer. Woods Hole Oceanographic Institution. Massachusetts Institute of Technology. Department of Ocean Engineering. Joint Program in Applied Ocean Physics and Engineering Woods Hole Oceanographic Institution. Massachusetts Institute of Technology. Department of Ocean Engineering Ocean Engineering. Joint Program in Applied Ocean Science and Engineering. Woods Hole Oceanographic Institution. Thesis (Ph. D.)--Joint Program in Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Dept. of Ocean Engineering and the Woods Hole Oceanographic Institution), 2001. Includes bibliographical references (leaves 207-215). Matched-field methods concern estimation of source location and/or ocean environmental parameters by exploiting full wave modeling of acoustic waveguide propagation. Typical estimation performance demonstrates two fundamental limitations. first, sidelobe ambiguities dominate the estimation at low signal-to-noise ratio (SNR), leading to a threshold performance behavior. Second, most matched-field algorithms show a strong sensitivity to environmental/system mismatch, introducing some biased estimates at high SNR. In this thesis, a quantitative approach for ambiguity analysis is developed so that different mainlobe and sidelobe error contributions can be compared at different SNR levels. Two large-error performance bounds, the Weiss-Weinstein bound (WWB) and Ziv-Zakai bound (ZZB), are derived for the attainable accuracy of matched-field methods. To include mismatch effects, a modified version of the ZZB is proposed. Performance analyses are implemented for source localization under a typical shallow water environment chosen from the Shallow Water Evaluation Cell Experiments (SWellEX). The performance predictions describe the simulations of the maximum likelihood estimator (MLE) well, including the mean square error in all SNR regions as well as the bias at high SNR. The threshold SNR and bias predictions are also verified by the SWellEX experimental data processing. These developments provide tools to better understand some fundamental behaviors in matched-field performance and provide benchmarks to which various ad hoc algorithms can be compared. by Wen Xu. Ph.D. 2014-11-04T21:29:24Z 2014-11-04T21:29:24Z 2001 2001 Thesis http://hdl.handle.net/1721.1/91333 49676474 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 215 leaves application/pdf Massachusetts Institute of Technology |
| spellingShingle | Ocean Engineering. Joint Program in Applied Ocean Science and Engineering. Woods Hole Oceanographic Institution. Xu, Wen, 1967- Performance bounds on matched-field methods for source localization and estimation of ocean environmental parameters |
| title | Performance bounds on matched-field methods for source localization and estimation of ocean environmental parameters |
| title_full | Performance bounds on matched-field methods for source localization and estimation of ocean environmental parameters |
| title_fullStr | Performance bounds on matched-field methods for source localization and estimation of ocean environmental parameters |
| title_full_unstemmed | Performance bounds on matched-field methods for source localization and estimation of ocean environmental parameters |
| title_short | Performance bounds on matched-field methods for source localization and estimation of ocean environmental parameters |
| title_sort | performance bounds on matched field methods for source localization and estimation of ocean environmental parameters |
| topic | Ocean Engineering. Joint Program in Applied Ocean Science and Engineering. Woods Hole Oceanographic Institution. |
| url | http://hdl.handle.net/1721.1/91333 |
| work_keys_str_mv | AT xuwen1967 performanceboundsonmatchedfieldmethodsforsourcelocalizationandestimationofoceanenvironmentalparameters |