Compressive Sound Speed Profile Inversion Using Beamforming Results
Sound speed profile (SSP) significantly affects acoustic propagation in the ocean. In this work, the SSP is inverted using compressive sensing (CS) combined with beamforming to indicate the direction of arrivals (DOAs). The travel times and the positions of the arrivals can be approximately lineariz...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-05-01
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| Series: | Remote Sensing |
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| Online Access: | http://www.mdpi.com/2072-4292/10/5/704 |
| _version_ | 1818312909668745216 |
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| author | Youngmin Choo Woojae Seong |
| author_facet | Youngmin Choo Woojae Seong |
| author_sort | Youngmin Choo |
| collection | DOAJ |
| description | Sound speed profile (SSP) significantly affects acoustic propagation in the ocean. In this work, the SSP is inverted using compressive sensing (CS) combined with beamforming to indicate the direction of arrivals (DOAs). The travel times and the positions of the arrivals can be approximately linearized using their Taylor expansion with the shape function coefficients that parameterize the SSP. The linear relation between the travel times/positions and the shape function coefficients enables CS to reconstruct the SSP. The conventional objective function in CS is modified to simultaneously exploit the information from the travel times and positions. The SSP is estimated using CS with beamforming of ray arrivals in the SWellEx-96 experimental environment, and the performance is evaluated using the correlation coefficient and mean squared error (MSE) between the true and recovered SSPs, respectively. Five hundred synthetic SSPs were generated by randomly choosing the SSP dictionary components, and more than 80 percent of all the cases have correlation coefficients over 0.7 and MSE along depth is insignificant except near the sea surface, which shows the validity of the proposed method. |
| first_indexed | 2024-12-13T08:25:21Z |
| format | Article |
| id | doaj.art-2e875e4c66444de29113f5fa1916186c |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-12-13T08:25:21Z |
| publishDate | 2018-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-2e875e4c66444de29113f5fa1916186c2022-12-21T23:53:54ZengMDPI AGRemote Sensing2072-42922018-05-0110570410.3390/rs10050704rs10050704Compressive Sound Speed Profile Inversion Using Beamforming ResultsYoungmin Choo0Woojae Seong1Department of Defense System Engineering, Sejong University, Seoul 05006, KoreaDepartment of Naval Architecture and Ocean Engineering and Research Institute of Marine System Engineering, Seoul National University, Seoul 08826, KoreaSound speed profile (SSP) significantly affects acoustic propagation in the ocean. In this work, the SSP is inverted using compressive sensing (CS) combined with beamforming to indicate the direction of arrivals (DOAs). The travel times and the positions of the arrivals can be approximately linearized using their Taylor expansion with the shape function coefficients that parameterize the SSP. The linear relation between the travel times/positions and the shape function coefficients enables CS to reconstruct the SSP. The conventional objective function in CS is modified to simultaneously exploit the information from the travel times and positions. The SSP is estimated using CS with beamforming of ray arrivals in the SWellEx-96 experimental environment, and the performance is evaluated using the correlation coefficient and mean squared error (MSE) between the true and recovered SSPs, respectively. Five hundred synthetic SSPs were generated by randomly choosing the SSP dictionary components, and more than 80 percent of all the cases have correlation coefficients over 0.7 and MSE along depth is insignificant except near the sea surface, which shows the validity of the proposed method.http://www.mdpi.com/2072-4292/10/5/704compressive sensingsound speed profile inversionbeamformingSWellEx-96 |
| spellingShingle | Youngmin Choo Woojae Seong Compressive Sound Speed Profile Inversion Using Beamforming Results Remote Sensing compressive sensing sound speed profile inversion beamforming SWellEx-96 |
| title | Compressive Sound Speed Profile Inversion Using Beamforming Results |
| title_full | Compressive Sound Speed Profile Inversion Using Beamforming Results |
| title_fullStr | Compressive Sound Speed Profile Inversion Using Beamforming Results |
| title_full_unstemmed | Compressive Sound Speed Profile Inversion Using Beamforming Results |
| title_short | Compressive Sound Speed Profile Inversion Using Beamforming Results |
| title_sort | compressive sound speed profile inversion using beamforming results |
| topic | compressive sensing sound speed profile inversion beamforming SWellEx-96 |
| url | http://www.mdpi.com/2072-4292/10/5/704 |
| work_keys_str_mv | AT youngminchoo compressivesoundspeedprofileinversionusingbeamformingresults AT woojaeseong compressivesoundspeedprofileinversionusingbeamformingresults |