卡车目标微多普勒建模及特征提取

doi:10.3969/j.issn.0255-8297.2014.02.009

应用科学学报 ›› 2014, Vol. 32 ›› Issue (2): 170-177.doi: 10.3969/j.issn.0255-8297.2014.02.009

卡车目标微多普勒建模及特征提取

李开明1，张群1,2，梁必帅1，罗迎1

1. 空军工程大学信息与导航学院，西安710077
2. 复旦大学波散射与遥感信息国家重点实验室，上海200433

收稿日期:2013-03-26 修回日期:2013-09-27 出版日期:2014-03-25 发布日期:2013-09-27
作者简介:李开明，博士生，研究方向：雷达成像与目标识别，E-mail: likaiming1982@163.com；张群：教授，博导，研究方向：雷达信号处理与电子对抗，E-mail: zhangqunnus@gmail.com
基金资助:
国家自然科学基金(No.61172169, No.61201369)；陕西省自然科学基金(No.2012JQ8036)资助

Micro-Doppler Modeling and Signature Extraction of Trucks

LI Kai-ming1, ZHANG Qun1,2, LIANG Bi-shuai1, LUO Ying1

1. School of Information and Navigation, Air Force Engineering University, Xi’an 710077, China
2. Key Laboratory of Wave Scattering and Remote Sensing Information, Fudan University, Shanghai 200433, China

Received:2013-03-26 Revised:2013-09-27 Online:2014-03-25 Published:2013-09-27

摘要/Abstract

摘要： 基于三维散射点模型，在窄带线性调频信号体制下对卡车目标进行回波建模，分析并推导了车身主体散射点的多普勒和轮毂旋转散射点微多普勒的数学表示. 利用两者的差异，有针对性地设计了单频和正弦调频原子集. 设置相应的阈值门限，提取出慢时间-距离平面能量较为集中的距离单元，并对其进行匹配分解，快速提取了卡车车轮旋转的微多普勒特征，为卡车目标的识别研究提供了依据. 仿真验证了该方法的有效性和稳健性.

关键词: 卡车, 微多普勒, 匹配追踪, 特征提取

Abstract: Based on a three-dimensional scatterer model, the echo from a truck is modeled under narrowband chirp signal system. Mathematical representations of the Doppler generated by bulk scatterers and micro-Doppler due to the rotating scatterers on the hub are analyzed and derived. A dictionary is designed
in terms of their differences. Meanwhile, a threshold of energy in slow time-range plane is set, which is useful in the extraction of echoes in energy-centralized range cells. Matching pursuit can be implemented by decomposing the echoes into corresponding atoms. Fast extraction of micro-Doppler signature of wheel rotation is accomplished. These provide references for truck recognition. Effectiveness and robustness of the method are shown by the simulation results.

Key words: truck, micro-Doppler (m-D), matching pursuit (MP), signature extraction

中图分类号:

TN957

李开明1，张群1,2，梁必帅1，罗迎1. 卡车目标微多普勒建模及特征提取[J]. 应用科学学报, 2014, 32(2): 170-177.

LI Kai-ming1, ZHANG Qun1,2, LIANG Bi-shuai1, LUO Ying1. Micro-Doppler Modeling and Signature Extraction of Trucks[J]. Journal of Applied Sciences, 2014, 32(2): 170-177.

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卡车目标微多普勒建模及特征提取

Micro-Doppler Modeling and Signature Extraction of Trucks

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