基于稀疏重建的穿墙雷达墙体参数估计方法
Sparse Recovery Method for Wall Parameter Estimation in Through-the-Wall Radar
  
DOI:
中文关键词:  穿墙雷达,墙体参数估计,稀疏重建,时延估计
英文关键词:through-the-wall radar (TWR), wall parameter estimation, sparse reconstruction, time-delay-only estimation (TDOE)
基金项目:国家自然科学基金(61671310);辽宁省高等学校创新人才基金(LR2016062);辽宁省兴辽英才计划项目 (XLYC1907134);辽宁省百千万人才工程项目(2018B21)
作者单位
屈乐乐 方中里 沈阳航空航天大学 电子信息工程学院,沈阳 110136 
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中文摘要:
      未知墙体参数的估计对穿墙雷达(TWR)的应用具有重要意义。时延估计(TDOE)方法能够有效获取被测均匀墙体参数。对于TDOE 方法,墙面反射回波时延估计的精度直接影响墙体参数估计的准确性。文中基于墙体回波的稀疏性提出了一种基于稀疏重建的墙体参数估计方法,通过利用正交匹配追踪(OMP)稀疏重建算法对每个双基地天线间隔下墙体回波信号进行时延估计,然后基于双基地和单基地混合测量模式采用TDOE 方法可以获得墙体的相对介电常数、厚度和电导率。仿真和实验结果表明所提出的估计方法能够提供更高精度的墙体参数估计。
英文摘要:
      Estimating unknown wall parameters is typically important for the application of through-the-wall radar (TWR). The time-delay-only estimation (TDOE) method is able to efficiently retrieve the constitutive parameters of the homogeneous wall under test. For the TDOE method, the estimation accuracy of time delays of wall reflection signals directly affects the accuracy of wall parameter estimation. In this paper, we propose a sparse recovery method for estimation of wall parameters, which exploits the sparsity of the wall reflection signals and utilizes the orthogonal matching pursuit (OMP) algorithm to retrieve the time delay estimation for each bistatic antenna separation. Then the TDOE method with the hybrid bistatic-monostatic measurement configuration is applied to obtain the relative permittivity, thickness and conductivity of the wall. Numerical simulation and experimental results have shown that the proposed estimation method is capable of providing the estimation of wall parameters with more accuracy and robustness.
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