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基于迭代近端投影的二维欠采样合成孔径雷达成像

李家强 郭桂祥 陈金立 朱艳萍

李家强, 郭桂祥, 陈金立, 朱艳萍. 基于迭代近端投影的二维欠采样合成孔径雷达成像[J]. 电子与信息学报, 2022, 44(6): 2127-2134. doi: 10.11999/JEIT210335
引用本文: 李家强, 郭桂祥, 陈金立, 朱艳萍. 基于迭代近端投影的二维欠采样合成孔径雷达成像[J]. 电子与信息学报, 2022, 44(6): 2127-2134. doi: 10.11999/JEIT210335
LI Jiaqiang, GUO Guixiang, CHEN Jinli, ZHU Yanping. Two-dimensional Underwent Synthetic Aperture Radar Imaging Based on Iterative Proximal Projection[J]. Journal of Electronics & Information Technology, 2022, 44(6): 2127-2134. doi: 10.11999/JEIT210335
Citation: LI Jiaqiang, GUO Guixiang, CHEN Jinli, ZHU Yanping. Two-dimensional Underwent Synthetic Aperture Radar Imaging Based on Iterative Proximal Projection[J]. Journal of Electronics & Information Technology, 2022, 44(6): 2127-2134. doi: 10.11999/JEIT210335

基于迭代近端投影的二维欠采样合成孔径雷达成像

doi: 10.11999/JEIT210335
基金项目: 国家自然科学基金(62071238, 61801231),江苏省自然科学基金(BK20191399)
详细信息
    作者简介:

    李家强:男,1976年生,博士,副教授,研究方向为雷达信号处理

    郭桂祥:男,1996年生,硕士生,研究方向为雷达信号处理

    陈金立:男,1982年生,博士,副教授,研究方向为MIMO雷达信号处理

    朱艳萍:女,1980年生,博士,讲师,研究方向为雷达信号处理

    通讯作者:

    李家强 ljq@nuist.edu.cn

  • 中图分类号: TN957.51

Two-dimensional Underwent Synthetic Aperture Radar Imaging Based on Iterative Proximal Projection

Funds: The National Natural Science Foundation of China (62071238, 61801231), The Natural Science Foundation of Jiangsu Province (BK20191399)
  • 摘要: 合成孔径成像雷达(SAR)具有数据量大、采样率高等特点,针对传统压缩感知(CS)的SAR成像存在精度低及抗噪性能差的问题,该文提出一种基于迭代近端投影(IPP)的2维欠采样合成孔径雷达成像重建方法。即通过对雷达回波构建为距离频域-方位多普勒域的2维稀疏表示模型,在此基础上将成像问题转化为距离向和方位向压缩感知稀疏重构问题,利用迭代近端投影算法的函数优化模型来表示合成孔径雷达成像中的稀疏表示,最后采用平滑削边绝对偏离(SCAD)罚函数获得近端算子以求解该模型并进行成像。仿真与实测数据处理结果表明,所提方法成像效果更好。
  • 图  1  合成孔径雷达成像几何模型

    图  2  SAR回波数据随机采样

    图  3  目标散射点模型与不同采样率下各算法成像结果

    图  4  不同采样率下成像性能曲线

    图  5  不同信噪比情况下各算法成像结果比较

    图  6  不同信噪比情况下成像性能曲线

    图  7  各算法成像结果

    表  1  雷达仿真参数

    参数数值
    雷达信号载频3 GHz
    雷达信号带宽150 MHz
    采样频率300 MHz
    雷达距目标区域中心点4200 m
    下载: 导出CSV

    表  2  采样率为原采样率1/2时各算法成像时间

    算法时间(s)
    IPP26.7381
    OMP18.7749
    SL027.3091
    BCS178.2851
    下载: 导出CSV

    表  3  温哥华场景RADARSAT-1参数

    参数数值
    距离带宽30.3 MHz
    距离向采样频率32.317 MHz
    脉冲宽度30.111 MHz
    卫星轨道半径7186029 m
    雷达波长0.05657 m
    下载: 导出CSV
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  • 被引次数: 0
出版历程
  • 收稿日期:  2021-04-20
  • 修回日期:  2022-02-28
  • 录用日期:  2022-03-07
  • 网络出版日期:  2022-03-19
  • 刊出日期:  2022-06-21

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