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Robust target detection algorithms for time reversal matched field processing.

机译:用于时间反转匹配场处理的鲁棒目标检测算法。

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摘要

Time reversal techniques have been exploited to achieve super resolution focusing in acoustics, radiotherapy medicine, and telecommunications. In this thesis, we develop analytical models to explain the super resolution focusing achieved with time-reversal, matched field processing. Our analytical model is based on multipaths introduced due to total internal reflections of the transmitted signal within a random medium, which is used to develop robust detection algorithms for the determination of the number and locations of passive scatterers embedded in an unknown medium. Using the analytical multipath model, we prove that the total number of scatterers equals the number of nonzero dominant eigenvalues of the system response matrix. The locations of the scatterers are estimated by extending the MUSIC algorithm to incorporate the analytical multipath model. A setup consisting of two transducer arrays, perpendicularly oriented from each other, is used to accurately estimate the location of the passive scatterers embedded in an unknown medium. (Abstract shortened by UMI.).
机译:时间倒转技术已被用来在声学,放射治疗医学和电信领域实现超分辨率聚焦。在本文中,我们开发了解析模型来解释通过时间反转,匹配场处理实现的超分辨率聚焦。我们的分析模型基于由于随机介质内传输信号的全内反射而引入的多径,该多径用于开发鲁棒的检测算法,用于确定嵌入未知介质中的无源散射体的数量和位置。使用解析多路径模型,我们证明了散射体的总数等于系统响应矩阵的非零主导特征值的数目。通过扩展MUSIC算法以合并分析多径模型来估计散射体的位置。由两个相互垂直定向的换能器阵列组成的设置可用于准确估计嵌入未知介质中的无源散射体的位置。 (摘要由UMI缩短。)。

著录项

  • 作者

    Bai, Qian.;

  • 作者单位

    York University (Canada).;

  • 授予单位 York University (Canada).;
  • 学科 Computer science.
  • 学位 M.Sc.
  • 年度 2005
  • 页码 148 p.
  • 总页数 148
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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