Estimating the instantaneous velocity of randomly moving target swarms in a stratified ocean waveguide by Doppler analysis
Doppleranalysis has been extensively used in active radar and sonar sensing to estimate the speed and direction of a single target within an imaging system resolution cell following deterministic theory. For target swarms, such as fish and plankton in the ocean, and raindrops, birds and bats in the...
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| Формат: | Статья |
| Язык: | en_US |
| Опубликовано: |
American Institute of Physics/Acoustical Society of America
2014
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| Online-ссылка: | http://hdl.handle.net/1721.1/87720 https://orcid.org/0000-0003-4369-296X |
| _version_ | 1826206037119598592 |
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| author | Bertsatos, Ioannis Makris, Nicholas |
| author2 | Massachusetts Institute of Technology. Department of Mechanical Engineering |
| author_facet | Massachusetts Institute of Technology. Department of Mechanical Engineering Bertsatos, Ioannis Makris, Nicholas |
| author_sort | Bertsatos, Ioannis |
| collection | MIT |
| description | Doppleranalysis has been extensively used in active radar and sonar sensing to estimate the speed and direction of a single target within an imaging system resolution cell following deterministic theory. For target swarms, such as fish and plankton in the ocean, and raindrops, birds and bats in the atmosphere, multiple randomly moving targets typically occupy a single resolution cell, making single-target theory inadequate. Here, a method is developed for simultaneously estimating the instantaneous mean velocity and position of a group of randomly moving targets within a resolution cell, as well as the respective standard deviations across the group by Doppleranalysis in free-space and in a stratified oceanwaveguide. While the variance of the field scattered from the swarm is shown to typically dominate over the mean in the range-velocity ambiguity function, cross-spectral coherence remains and maintains high Dopplervelocity and position resolution even for coherent signal processing algorithms such as the matched filter. For pseudo-random signals, the mean and variance of the swarms’ velocity and position can be expressed in terms of the first two moments of the measured range-velocity ambiguity function. This is shown analytically for free-space and with Monte-Carlo simulations for an oceanwaveguide. |
| first_indexed | 2024-09-23T13:23:01Z |
| format | Article |
| id | mit-1721.1/87720 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:23:01Z |
| publishDate | 2014 |
| publisher | American Institute of Physics/Acoustical Society of America |
| record_format | dspace |
| spelling | mit-1721.1/877202022-10-01T14:53:19Z Estimating the instantaneous velocity of randomly moving target swarms in a stratified ocean waveguide by Doppler analysis Bertsatos, Ioannis Makris, Nicholas Massachusetts Institute of Technology. Department of Mechanical Engineering Makris, Nicholas Makris, Nicholas Doppleranalysis has been extensively used in active radar and sonar sensing to estimate the speed and direction of a single target within an imaging system resolution cell following deterministic theory. For target swarms, such as fish and plankton in the ocean, and raindrops, birds and bats in the atmosphere, multiple randomly moving targets typically occupy a single resolution cell, making single-target theory inadequate. Here, a method is developed for simultaneously estimating the instantaneous mean velocity and position of a group of randomly moving targets within a resolution cell, as well as the respective standard deviations across the group by Doppleranalysis in free-space and in a stratified oceanwaveguide. While the variance of the field scattered from the swarm is shown to typically dominate over the mean in the range-velocity ambiguity function, cross-spectral coherence remains and maintains high Dopplervelocity and position resolution even for coherent signal processing algorithms such as the matched filter. For pseudo-random signals, the mean and variance of the swarms’ velocity and position can be expressed in terms of the first two moments of the measured range-velocity ambiguity function. This is shown analytically for free-space and with Monte-Carlo simulations for an oceanwaveguide. 2014-06-10T16:15:36Z 2014-06-10T16:15:36Z 2011 2010-12 Article http://purl.org/eprint/type/JournalArticle 00014966 http://hdl.handle.net/1721.1/87720 Bertsatos, Ioannis, and Nicholas C. Makris. “Estimating the Instantaneous Velocity of Randomly Moving Target Swarms in a Stratified Ocean Waveguide by Doppler Analysis.” The Journal of the Acoustical Society of America 130, no. 1 (2011): 84. © 2011 Acoustical Society of America. https://orcid.org/0000-0003-4369-296X en_US http://dx.doi.org/10.1121/1.3557039 Journal of the Acoustical Society of America Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Institute of Physics/Acoustical Society of America Prof. Makris via Angie Locknar |
| spellingShingle | Bertsatos, Ioannis Makris, Nicholas Estimating the instantaneous velocity of randomly moving target swarms in a stratified ocean waveguide by Doppler analysis |
| title | Estimating the instantaneous velocity of randomly moving target swarms in a stratified ocean waveguide by Doppler analysis |
| title_full | Estimating the instantaneous velocity of randomly moving target swarms in a stratified ocean waveguide by Doppler analysis |
| title_fullStr | Estimating the instantaneous velocity of randomly moving target swarms in a stratified ocean waveguide by Doppler analysis |
| title_full_unstemmed | Estimating the instantaneous velocity of randomly moving target swarms in a stratified ocean waveguide by Doppler analysis |
| title_short | Estimating the instantaneous velocity of randomly moving target swarms in a stratified ocean waveguide by Doppler analysis |
| title_sort | estimating the instantaneous velocity of randomly moving target swarms in a stratified ocean waveguide by doppler analysis |
| url | http://hdl.handle.net/1721.1/87720 https://orcid.org/0000-0003-4369-296X |
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