Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Sub-bottom Profiling Algorithm using Parametric Array

파라메트릭 배열을 이용한 해저지층 탐사 알고리즘

  • Lee, Chong Hyun (Department of Ocean System Engineering, Jeju National Univ.) ;
  • Lee, Jaeil (Department of Ocean System Engineering, Jeju National Univ.) ;
  • Bae, Jinho (Department of Ocean System Engineering, Jeju National Univ.)
  • 이종현 (제주대학교 해양시스템공학과) ;
  • 이재일 (제주대학교 해양시스템공학과) ;
  • 배진호 (제주대학교 해양시스템공학과)
  • Received : 2014.01.14
  • Accepted : 2014.02.20
  • Published : 2014.02.28
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Abstract

In this paper, we propose an threshold-based Schur algorithm for estimating the media characteristics of sub-bottom multi-layers by using the signal generated by a parametric array transducer. We use the KZK model to generate a parametric array signal, and use the proposed threshold-based Schur algorithm for estimating the reflection coefficients of multiple sea bottom layers. Using computer simulation, we verify that the difference frequency component generated by the KZK model prevails over the signals of primary frequencies at long range. For the simulation, we use the transmit signal generated by the KZK and the reflected signal obtained from a lattice filter model for the seawater and sub-bottom of multi-level non-homogeneous layers. Through the simulation, we verify that the proposed threshold-based Schur algorithm can give much more accurate and efficient estimates of the reflection coefficients than methods using received signal, matched filter output signal, and normal Schur algorithm output.

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References

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