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Parameter estimation for micro-Doppler signals based on cubic phase function - Springer

机译：基于立方相位函数的微多普勒信号参数估计-Springer

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摘要

An estimator for evaluating the parameters from the radar returned multicomponent micro-Doppler (m-D) signals is presented in this paper. While time frequency distribution (TFD) is commonly used to analyze the time-varying m-D frequency features in TF domain, the proposed algorithm is based on cubic phase function (CPF) that can transform the signal to time frequency rate domain. In order to estimate the parameters of multicomponent m-D signal, the extended Hough transform (HT) of CPF is employed to estimate linear frequency modulation (LFM) or sinusoidal frequency modulation (SFM) components. For the m-D signal composed of both LFM and SFM components, the estimates involve two steps of HT-CPF. Firstly, LFM components are estimated by HT-CPF and removed from the time frequency rate plane, and then, HT of the modified time frequency rate distribution is applied to estimate SFM ones. Compared with HT-TFD, this algorithm needs less dimension of HT space and is thus computationally efficient. In addition, simulations show that the algorithm has almost the same performance signal-to-noise threshold as HT of Wigner–Ville distribution method.
机译：本文提出了一种评估器，用于评估雷达返回的多分量微多普勒（m-D）信号的参数。虽然时频分布（TFD）通常用于分析TF域中随时间变化的m-D频率特征，但该算法基于三次相位函数（CPF），可以将信号转换为时频率域。为了估计多分量m-D信号的参数，使用CPF的扩展霍夫变换（HT）来估计线性频率调制（LFM）或正弦频率调制（SFM）分量。对于由LFM和SFM分量组成的m-D信号，估计包括HT-CPF的两个步骤。首先，通过HT-CPF估计LFM分量并将其从时频速率平面中删除，然后将修改后的时频速率分布的HT应用于SFM分量的估计。与HT-TFD相比，该算法所需的HT空间尺寸较小，因此计算效率高。此外，仿真表明，该算法具有与Wigner-Ville分布方法的HT几乎相同的性能信噪阈值。

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  • 来源
    《Signal, Image and Video Processing》 |2013年第6期|1239-1249|共11页
  • 作者

    Po Li; De-Chun Wang; Jin-Li Chen;

  • 作者单位

    1.School of Electronic and Optical Engineering Nanjing University of Science and Technology Nanjing China 2.College of Electronic and Information Engineering Nanjing University of Information Science and Technology Nanjing China;

    1.School of Electronic and Optical Engineering Nanjing University of Science and Technology Nanjing China 3.Nanjing Research Institute of Electronics Technology Nanjing China;

    2.College of Electronic and Information Engineering Nanjing University of Information Science and Technology Nanjing China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Micro-Doppler; Hough transform; Cubic phase function; Frequency modulation signals;

    机译：微多普勒;霍夫变换;三次相位函数;频率调制信号;

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