宇航学报

宇航学报 ›› 2012, Vol. 33 ›› Issue (3): 346-352.doi: 10.3873/j.issn.1000-1328.2012.03.010

• 电子信息 • 上一篇    下一篇

基于运动参数估计的高超声速目标检测方法研究

李志淮1, 谭贤四2, 王红2, 张建华2   

  1. 1. 空军雷达学院研究生管理大队, 武汉 430019； 2. 空军雷达学院陆基预警监视装备系, 武汉 430019
  • 收稿日期:2011-02-20 修回日期:2011-11-22 出版日期:2012-03-15 发布日期:2012-03-16
  • 作者简介:10001328（2012）03034607
  • 基金资助:
    收稿日期：20110220;
    修回日期：20111122

Detection Algorithm for Hypersonic Targets Based on Motion Parameter Estimation

LI Zhi-huai 1, TAN Xian-si 2, WANG Hong 2, ZHANG Jian-hua 2   

  1. 1. Group of Graduate Management, Air Force Radar Academy, Wuhan 430019, China; 2. Department of Land-Based Early Warning Surveillance Equipment, Air Force Radar Academy, Wuhan 430019, China
  • Received:2011-02-20 Revised:2011-11-22 Online:2012-03-15 Published:2012-03-16

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摘要： 在分析高超声速目标运动对雷达检测影响的基础上，采用参数估计补偿方法进行目标检测。该方法消除了距离走动及多普勒走动的影响，大大提高了高超声速目标的检测性能。在参数估计时，提出一种回波信号分段参数估计方法，分别对前后两段回波信号进行无模糊多普勒频率估计，然后利用两个不同多普勒频率进行多普勒调频率计算。该方法消除了多普勒模糊现象，避免了模糊因子的估计，减少了计算量，同时降低了对输入信噪比的要求。

关键词: 目标检测, 多普勒频率估计, 多普勒调频率估计, 高超声速

Abstract: Based on the analysis of the influence of the hypersonic flight of targets on radar detection, a parameter estimating and compensation method is proposed for target detection. The proposed method can eliminate range and Doppler migration, as a result, it improves the detection performance of hypersonic targets greatly. A method of segment parameter estimation is presented to estimate parameters. Unambiguous Doppler frequencies estimation of forward and back segments of echo signal are used respectively, and the Doppler frequency rate is calculated by using the difference between two Doppler frequencies. This method eliminates the Doppler ambiguity, avoids the estimation of fuzzy factor and reduces the computational cost. Additionally, it reduces the requirement for input SNR.

Key words: Target detection, Doppler frequency estimation, Doppler frequency rate estimation, Hypersonic

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