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- W2029894989 abstract "The detection of small targets that appear suddenly or are moving slowly in strong bottom reverberation is a challenging problem for sonar surveillance in shallow water. Based on a new reverberation model, this paper proposes a target detection scheme that provides target sub-clutter visibility in the presence of reverberation. Experimental evidence shows that the bottom reverberation as seen by a stationary sonar is coherent, or at least partially coherent from ping to ping. Therefore, the bottom reverberation from a particular range cell is modeled as a complex signal composed of a stationary or slowly varying coherent component, plus a rapidly varying diffuse component. The coherent component is easily estimated using a recursive mean estimator and then removed by a simple subtraction so that the target need only compete with the diffuse component. Experimental results show a detection gain, as measured by the coherent-to-diffuse ratio, as high as 30dB." @default.
- W2029894989 created "2016-06-24" @default.
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- W2029894989 date "2006-09-01" @default.
- W2029894989 modified "2023-09-26" @default.
- W2029894989 title "Detecting Small Slow-moving Sonar Targets Using Bottom Reverberation Coherence" @default.
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- W2029894989 doi "https://doi.org/10.1109/oceans.2006.307012" @default.
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