基于参数化时频分析的进动锥裙目标瞬时微多普勒频率提取方法

肖金国; 杜兰; 韩勋; 曹文杰; 刘宏伟

doi:10.11999/JEIT150505

基于参数化时频分析的进动锥裙目标瞬时微多普勒频率提取方法

doi: 10.11999/JEIT150505

基金项目:

国家自然科学基金(61271024, 61201292, 61322103)，高等学校博士学科点专项科研基金博导类基金(20130203110013)，陕西省自然科学基础研究计划(2015JZ016)

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- 被引次数: 22
出版历程
- 收稿日期: 2015-04-30
- 修回日期: 2015-09-06
- 刊出日期: 2016-01-19

Micro-Doppler Frequency Extraction for Cone-skirt Shaped Target with Precession Based on Parameterized Time-frequency Analysis

Funds:

The National Natural Science Foundation of China (61271024, 61201292, 61322103), The Foundation for Doctoral Supervisor of China (20130203110013), The Science Foundation of Shaanxi Province (2015JZ016)

摘要

摘要: 微动目标散射点的微多普勒对目标运动、结构参数的估计具有重要意义。该文针对表面光滑的锥裙目标，首先依据进动锥裙目标的等效散射点模型，推导出散射点的理论微多普勒曲线表达式。结合进动调制的锥裙目标微多普勒曲线为多阶正弦级数叠加的先验信息，提出一种基于参数化时频分析的进动锥裙目标微多普勒曲线提取方法。针对多分量信号组成的锥裙目标回波，该方法利用相干信号单距离多普勒干涉(CSRDI)方法估计锥旋频率，进而利用参数化时频分析估计散射点的微多普勒曲线，之后利用带阻滤波器分离估计得到的散射点回波信号。基于电磁仿真数据验证了所提方法的有效性。
- 锥裙目标 /
- 进动 /
- 微多普勒 /
- 参数化时频分析 /
- 相干信号单距离多普勒干涉方法
Abstract: The micro-Doppler signatures can be utilized to the estimation of the motion and structure parameters of the targets. In this paper, based on the effective point scatterer model of the cone-skirt shaped target, the formulas of micro-Doppler induced by the precession are derived. Since the micro-Doppler curves induced by the precession are in the forms of the multi-stage superimposed sine series for the cone-skirt shaped target, an approach to extract the micro-Doppler frequency based on the parameterized time-frequency analysis is proposed. In this method, the precession frequency is first estimated via the Coherent Single Range Doppler Interferometry (CSRDI) algorithm, then the micro-Doppler curve of each scatterer is estimated based on the parameterized time-frequency analysis, and finally the scatterers echoes can be separated with the band-stop filter. In the simulation experiments, the proposed method is evaluated based on the electromagnetic computation data.
- Cone-skirt shaped target /
- Precession /
- Micro-Doppler /
- Parameterized time-frequency analysis /
- Coherent Single Range Doppler Interferometry (CSRDI) algorithm

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