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基于积累孔径插值技术的星载间断调频连续波SAR成像方法

闵林 刘向前 李宁

闵林, 刘向前, 李宁. 基于积累孔径插值技术的星载间断调频连续波SAR成像方法[J]. 电子与信息学报, 2022, 44(7): 2461-2468. doi: 10.11999/JEIT210140
引用本文: 闵林, 刘向前, 李宁. 基于积累孔径插值技术的星载间断调频连续波SAR成像方法[J]. 电子与信息学报, 2022, 44(7): 2461-2468. doi: 10.11999/JEIT210140
MIN Lin, LIU Xiangqian, LI Ning. Spaceborne Interrupted Frequency Modulation Continuous Wave SAR Imaging Based on Accumulated Aperture Interpolation Technique[J]. Journal of Electronics & Information Technology, 2022, 44(7): 2461-2468. doi: 10.11999/JEIT210140
Citation: MIN Lin, LIU Xiangqian, LI Ning. Spaceborne Interrupted Frequency Modulation Continuous Wave SAR Imaging Based on Accumulated Aperture Interpolation Technique[J]. Journal of Electronics & Information Technology, 2022, 44(7): 2461-2468. doi: 10.11999/JEIT210140

基于积累孔径插值技术的星载间断调频连续波SAR成像方法

doi: 10.11999/JEIT210140
基金项目: 国家自然科学基金(61871175),河南省高等学校重点科研项目(19A420005, 21A520004),河南省科技攻关计划项目(192102210082, 212102210093, 212102210101),河南省青年人才托举工程(2019HYTP006)
详细信息
    作者简介:

    闵林:男,1963年生,教授,研究方向为SAR图像与信号处理

    刘向前:男,1997年生,硕士生,研究方向为SAR成像技术

    李宁:男,1987年生,教授,研究方向为多模式合成孔径雷达成 像及其应用技术

    通讯作者:

    李宁 hedalining@henu.edu.cn

  • 中图分类号: TN957.52

Spaceborne Interrupted Frequency Modulation Continuous Wave SAR Imaging Based on Accumulated Aperture Interpolation Technique

Funds: The National Natural Science Foundation of China (61871175), The College Key Research Project of Henan Province (19A420005, 21A520004), The Plan of Science and Technology of Henan Province (192102210082, 212102210093, 212102210101), The Youth Talent Lifting Project of Henan Province (2019HYTP006)
  • 摘要: 间断调频连续波(IFMCW)合成孔径雷达(SAR)模式通过在不同时间间隔内交替发射和接收信号,解决了星载调频连续波(FMCW)SAR必须收发分置的问题。然而,在该模式下,雷达天线会间歇性地工作于发射和接收状态,从而导致回波数据中出现周期性的空缺。为了解决上述问题,该文提出了一种基于积累孔径插值技术的缺失数据迭代自适应成像处理方法(MIAA-AAIT),用于恢复缺失的数据。实验结果表明,所提方法可以有效地恢复缺失数据,从而显著提高成像质量,大幅降低由周期性数据缺失引起的虚假目标能量。
  • 图  1  星载IFMCW SAR正侧视条带成像几何关系图

    图  2  IFMCW模式收发时序图

    图  3  FMCW SAR回波数据和IFMCW SAR回波数据

    图  4  本文所提MIAA-AAIT方法总体流程图

    图  5  本文方法子孔径划分过程示意图

    图  6  基于MIAA的孔径插值流程图

    图  7  点阵目标仿真成像结果

    图  8  点目标方位向剖面图

    图  9  面目标仿真成像结果

    图  10  A舰船中心方位向剖面图

    表  1  星载IFMCW SAR模式仿真参数

    参数 数值 参数 数值
    雷达工作载频(Hz) 16.70 脉冲发射频率(Hz) 3479.00
    雷达有效速度(m/s) 7613.00 天线长度(m) 4.48
    带宽(MHz) 180.00 接收脉冲(个) 13
    景中心斜距(km) 534.00 缺失脉冲(个) 12
    发射脉冲时宽(μs) 266.71 斜视角(°) 0
    下载: 导出CSV

    表  2  研究区域IC和IE

    模式 IC IE
    FMCW 1.70 10.35
    IFMCW 0.94 11.53
    LPM-AAIT 1.58 10.92
    MIAA-AAIT 1.63 10.56
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-02-07
  • 修回日期:  2021-03-26
  • 网络出版日期:  2021-04-15
  • 刊出日期:  2022-07-25

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