J4 ›› 2011, Vol. 38 ›› Issue (3): 55-62.doi: 10.3969/j.issn.1001-2400.2011.03.010

• 研究论文 • 上一篇    下一篇

复合运动目标微多普勒特征的分析和提取

陈广锋1,2;张林让1;王纯1;刘高高1
  

  1. (1. 西安电子科技大学 雷达信号处理国家重点实验室,陕西 西安  710071;
    2. 西安文理学院 数学系,陕西 西安  710065)
  • 收稿日期:2010-04-21 出版日期:2011-06-20 发布日期:2011-07-14
  • 通讯作者: 陈广锋
  • 作者简介:陈广锋(1973-),男,副教授,西安电子科技大学博士研究生,E-mail: chgfeng@126.com.
  • 基金资助:

    国家自然科学基金资助项目(60672130)

Micro-Doppler feature analysis and extraction of  the complex motion target

CHEN Guangfeng1,2;ZHANG Linrang1;WANG Chun1;LIU Gaogao1
  

  1. (1. National Key Lab. of Radar Signal Processing, Xidian Univ., Xi'an   710071, China|
    2. Dept. of Mathematics, Xi'an Univ. of Arts and Science, Xi'an   710065, China)
  • Received:2010-04-21 Online:2011-06-20 Published:2011-07-14
  • Contact: CHEN Guangfeng

摘要:

目标的微运动所产生的微多普勒特征包含了目标的运动和结构信息.针对目标微运动特征的复杂性和差异性,以无旋翼目标和有旋翼目标为背景,分别建立了具有平动、加速与振动特征的散射点模型和具有平动、加速、振动及旋转运动特征的散射点模型,分析了两种模型的微多普勒特征及其差异.通过仿真,采用平滑伪Winger-Ville时频分析方法,从雷达回波中提取了两种复合运动的微多普勒特征,结果与理论推导一致,从而验证了模型及其微多普勒理论分析的正确性.

关键词: 微多普勒, 复合运动, 振动, 旋转, 时频分析

Abstract:

Micro-Doppler signature produced by micro-motion contains movement and structure information which is useful for radar classification and recognition. Because of the complexity and difference of micro-motion, based on non-rotor targets and rotary-wing targets, the complex motion scattering point with translation, acceleration and vibration is modeled, so is complex motion scattering point with translation, vibration, acceleration and rotation. Then their micro-Doppler modulation and difference are analyzed. By simulation, the micro-Doppler modulation induced by the two models is extracted from the radar echo with the Smoothed pseudo Winger-Ville time-frequency analysis method, which agrees well with the computed results and proves that the models and the mathematical derivation of their micro-Doppler theoretical analysis are valid.

Key words: micro-Doppler, complex motion, vibration, rotation, time-frequency analysis