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中国科学院大学学报 ›› 2014, Vol. 31 ›› Issue (2): 231-237.DOI: 10.7523/jssn.2095-6134.2014.02.013

• 信息与电子科学 • 上一篇    下一篇

基于随机重复频率和压缩感知的运动目标ISAR成像

刘波1,2,3, 李道京1,2   

  1. 1. 中国科学院电子学研究所, 北京 100190;
    2. 微波成像技术重点实验室, 北京 100190;
    3. 中国科学院大学, 北京 100190
  • 收稿日期:2013-04-18 修回日期:2013-07-05 发布日期:2014-03-15
  • 通讯作者: 刘波,E-mail:lynnandsky@163.com
  • 基金资助:

    国家自然科学基金(61271422)和中国科学院支撑项目资助

Moving target ISAR imaging based on random pulse repetition frequency and compressed sensing

LIU Bo1,2,3, LI Daojing1,2   

  1. 1. Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
    2. Science and Technology on Microwave Imaging Laboratory, Beijing 100190, China;
    3. University of Chinese Academy of Sciences, Beijing 100190, China
  • Received:2013-04-18 Revised:2013-07-05 Published:2014-03-15

摘要:

研究压缩感知(CS)理论在运动目标ISAR成像中的应用问题,结合CS理论的使用条件和ISAR雷达系统探测需求,提出一种基于随机重复频率的采样方案. 针对毫米波ISAR观测运动目标时有严重的多普勒模糊问题,提出一种基于随机重频的运动目标CS成像方法,并分析随机重复间隔的变化区间宽度和最小变化间隔对该方法性能的影响. 计算机仿真和实际数据处理结果验证了本方法的有效性.

关键词: ISAR成像, 压缩感知, 运动目标, 多普勒模糊, 随机重复频率

Abstract:

A moving target ISAR imaging method based on compressed sensing (CS) theory is presented. Random pulse repetition frequency is used to meet the requirements of both CS theory and ISAR target detection. This ISAR imaging method based on random pulse repetition frequency and CS theory is aimed at solving the Doppler ambiguity problem brought by moving target in ISAR observation model. The effects of the change range of the random interval and the minimum of the change step on the pesformance of the method are analyzed. The validity of the proposed method is testified by the simulation and applications.

Key words: ISAR imaging, compressed sensing, moving target, Doppler ambiguity, random pulse repetition frequency

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