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兵工学报 ›› 2002, Vol. 23 ›› Issue (2): 191-195.

• 论文 • 上一篇    下一篇

基于改进变采样率处理技术的SAR运动目标检测

1:孙泓波,刘国岁 | 2:王盛利,倪晋麟   

  1. 1:南京理工大学电子工程技术研究中心,江苏南京,210094 | 2:南京电子技术研究所六部
  • 收稿日期:2001-05-01 修回日期:2002-03-01 上线日期:2014-12-25
  • 通讯作者: 孙泓波
  • 基金资助:
    国防科技重点实验室基金资助项目(No.99JS01.4.1.D22401)

SAR Moving Target Detection Based on an Improved Changeable Sampling Ratio Processing Technology

1:Sun Hongbo,Liu Guosui | 2: Wang Shengli,Ni Jinlin   

  1. 1:Research Center of Electronic Engineering Technology, Nanjing University of Science and Technology, Nanjing, 210094 | 2: Department No. 6,Nanjing Research Institute of Electronics Technology
  • Received:2001-05-01 Revised:2002-03-01 Online:2014-12-25
  • Contact: Sun Hongbo

摘要: 变采样率处理技术是一种检测线性调频信号调制率有力的处理方法,但剩余多普勒对检测性能的影响十分严重。本文首先分析了变采样率处理技术的性能及剩余多普勒的影响,然后提出了一种基于模糊函数重构的方法,它可以完全消除剩余多普勒的影响,使变采样率处理技术获得理想的性能。最后将这种改进的变采样率处理技术用于机载合成孔径雷达的运动目标检测,给出了检测算法。仿真实验的结果证明了算法的有效性。

关键词: 合成孔径雷达 , 运动目标检测 , 变采样率处理 , 模糊函数

Abstract: The proposed changeable sampling ratio processing technology (CSPT) is an effective tech?nique to detect the ratio of modulation of chirp signal. But the remainder doppler frequency influences its performance seriously. In this paper, the performance of CSPT and the influence of remainder doppler fre?quency are firstly analyzed. I hen a new algorithm is proposed to eliminate the remainder doppler frequency based entirely on the signal reconstruction from its ambiguity function. Then CSPT can achieve the ideal performance. r mally this method is applied to airborne synthetic aperture radar moving target detection and the detection scneme is given. The simulation results prove its effectiveness.

Key words: synthetic aperture radar , moving target detection , changeable sampling-ratio processing , ambiguity function

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