Echo statistics associated with discrete scatterers: A tutorial on physics-based methods Stanton, Timothy K. Lee, Wu-Jung Baik, Kyungmin 2019-01-29T21:55:27Z 2019-06-06T08:08:50Z 2018-12-06
dc.description Author Posting. © Acoustical Society of America, 2018. This article is posted here by permission of Acoustical Society of America for personal use, not for redistribution. The definitive version was published in Journal of the Acoustical Society of America, 144(6), (2018): 3124-3171. doi: 10.1121/1.5052255. en_US
dc.description.abstract When a beam emitted from an active monostatic sensor system sweeps across a volume, the echoes from scatterers present will fluctuate from ping to ping due to various interference phenomena and statistical processes. Observations of these fluctuations can be used, in combination with models, to infer properties of the scatterers such as numerical density. Modeling the fluctuations can also help predict system performance and associated uncertainties in expected echoes. This tutorial focuses on “physics-based statistics,” which is a predictive form of modeling the fluctuations. The modeling is based principally on the physics of the scattering by individual scatterers, addition of echoes from randomized multiple scatterers, system effects involving the beampattern and signal type, and signal theory including matched filter processing. Some consideration is also given to environment-specific effects such as the presence of boundaries and heterogeneities in the medium. Although the modeling was inspired by applications of sonar in the field of underwater acoustics, the material is presented in a general form, and involving only scalar fields. Therefore, it is broadly applicable to other areas such as medical ultrasound, non-destructive acoustic testing, in-air acoustics, as well as radar and lasers. en_US
dc.description.embargo 2019-06-06 en_US
dc.description.sponsorship The content of this work is based on research conducted in the past from years of support from the U.S. Office of Naval Research and the Woods Hole Oceanographic Institution, Woods Hole, MA. Writing of the manuscript by W.-J.L. was also supported by the Science and Engineering Enrichment and Development Postdoctoral Fellowship from the Applied Physics Laboratory, University of Washington, WA. The authors are grateful to Dr. Benjamin A. Jones of the Naval Postgraduate School, Monterey, CA for his thoughtful suggestions on an early draft of the manuscript. The authors are also grateful to the reviewer for the in-depth and constructive recommendations. W.-J.L. and K.B. contributed equally to this work. en_US
dc.identifier.citation Stanton, T. K., Lee, .W, & Baik, K. (2018). Echo statistics associated with discrete scatterers: A tutorial on physics-based methods. Journal of the Acoustical Society of America, 144(6), 3124-3171 en_US
dc.publisher Acoustical Society of America en_US
dc.title Echo statistics associated with discrete scatterers: A tutorial on physics-based methods en_US
dc.type Article en_US
dspace.entity.type Publication
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