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应用科学学报 ›› 2011, Vol. 29 ›› Issue (4): 397-404.doi: 10.3969/j.issn.0255-8297.2011.04.011

• 信号与信息处理 • 上一篇    下一篇

 微多普勒特征提取中的时频分布选择

程旭， 刘进， 王雪松， 戴幻尧   

  1. 国防科学技术大学电子科学与工程学院，长沙410073
  • 收稿日期:2010-11-16 修回日期:2011-05-23 出版日期:2011-07-30 发布日期:2011-07-30
  • 作者简介:王雪松，博士，教授，博导，研究方向：新体制雷达探测、雷达极化信息处理、雷达电子战建模与仿真等，E-mail: wxsl0l9@ vip.sina.com
  • 基金资助:

    国家自然科学基金(No.60736006, No.60672033)资助

Selection of Time-Frequency Distribution for Extraction of Micro-Doppler Signatures

CHENG Xu, LIU Jin, WANG Xue-song, DAI Huan-yao   

  1. School of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
  • Received:2010-11-16 Revised:2011-05-23 Online:2011-07-30 Published:2011-07-30
  • Supported by:

    王雪松，博士，教授，博导，研究方向：新体制雷达探测、雷达极化信息处理、雷达电子战建模与仿真等，E-mail: wxsl0l9@
    vip.sina.com

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摘要：

 针对雷达目标微多普勒特征提取中的时频分布选择问题，从理论上分析了微多普勒信号的时频分布特点. 对于多分量微多普勒信号，通过引入性能评价准则给出了时频分布的性能评价指标，并进一步提出微多普勒信号的时频分布优化选择方法. 仿真结果表明，平滑伪Wigner-Ville分布具有最优的时频性能. 该结论对微多普勒提取的时频算法选择及高精度的瞬时频率估计具有指导意义.

关键词: 微多普勒, 时频分布, 评价准则, 优化选择, 平滑伪Wigner-Ville分布

Abstract:

Aim at selection of time-frequency distribution (TFD) in the analysis of radar micro-Doppler
signature, we carry out theoretical analysis of the characteristics of micro-Doppler signal’s TFD. For multicomponent
micro-Doppler signal, specifications of TFD are given by criteria of objective assessment of the
TFD performance. Furthermore, a procedure of selecting optimal TFD for a given multi-component micro-
Doppler signal is provided. Simulation shows that the smoothed pseudo Wigner-Ville distribution has optimal
performance among the tested TFDs. The result provides guidance for TFD selection in the extraction of
micro-Doppler signatures and estimation of high-precision instantaneous frequency.

Key words:  micro-Doppler, time-frequency distribution, assessment criterion, optimal selection, smoothed pseudo Wigner-Ville distribution

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