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<p>The paper proposes the accelerated method for reconstructing radio images based on monostatic ultra-wideband sounding data from a&#xa0;set of distributed scatterers. The method is based on reducing the reconstruction points of the studied medium by detecting the areas with scatterers. In a&#xa0;homogeneous medium, scatterers are not needed in reconstruction, allowing to significantly reduce the amount of calculation. In order to effectively isolate the areas of the scatterer location, it is proposed to reconstruct the scatterer image at several spatial resolutions: first, low and a&#xa0;successive two-fold increase in resolution. Low-resolution images are constructed from signals with a&#xa0;reduced frequency band. Such images approximately show the presence or absence of scatterers in a&#xa0;particular area. A&#xa0;further increase in resolution is performed only in areas where the level of the reconstructed signal exceeds the specified threshold. Numerical simulation results show a&#xa0;several times decrease in the amount of calculation for the proposed method than the migration method.</p>

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Accelerated time migration for radio tomography based on spatial resolution adaptation to scatterer distribution

  • 期刊论文

  • 发表日期：

    2025年9月1日

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  • V. L. Khmelev,
  • D. Ya. Sukhanov

摘要

The paper proposes the accelerated method for reconstructing radio images based on monostatic ultra-wideband sounding data from a set of distributed scatterers. The method is based on reducing the reconstruction points of the studied medium by detecting the areas with scatterers. In a homogeneous medium, scatterers are not needed in reconstruction, allowing to significantly reduce the amount of calculation. In order to effectively isolate the areas of the scatterer location, it is proposed to reconstruct the scatterer image at several spatial resolutions: first, low and a successive two-fold increase in resolution. Low-resolution images are constructed from signals with a reduced frequency band. Such images approximately show the presence or absence of scatterers in a particular area. A further increase in resolution is performed only in areas where the level of the reconstructed signal exceeds the specified threshold. Numerical simulation results show a several times decrease in the amount of calculation for the proposed method than the migration method.