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Experimental Study of Backscattered Underwater Signals from Multiple Scatterers  

Kim, Eunhye (Department of Earth ＆ Marine Sciences Hanyang University)
Yoon, Kwan-seob (Department of Earth ＆ Marine Sciences Hanyang University)
Jungyul Na (Department of Earth ＆ Marine Sciences Hanyang University)
Publication Information
The Journal of the Acoustical Society of Korea / v.23, no.1E, 2004 , pp. 31-39 More about this Journal
Abstract
Backscattered underwater signals from multiple scatterers contain information regarding resolvable spatial distribution of scatterers. This experimental study describes the spectral characteristics of backscattered signal from multiple scatterers, which are regularly or randomly spaced, in terms of their amplitude and phase and a proper signal analysis that will eventually provide scatterer spacing estimation. Air-filled tubes suspended in water, steel balls and plastic tubes buried in the sediment are the multiple scatterers. The cepstrum and the spectral autocorrelation (SAC) methods were used to estimate the scatterer spacing from the backscattered signals. It was found that the SAC method could be improved by employing singular value decomposition (SVD) to extract the effective rank for the spectral components. Unlike the conventional method of estimating the density of scatterers within the insonified volume of water, this type of estimation method would provide better understanding of the spatial distribution of scatterers in the ocean.
Keywords
Multiple scatterers; Backscattered underwater signal; Spatial distribution spectrum; Phase spectrum; Scatterer spacing;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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