| 斜视合成孔径雷达的稀疏降采样数据成像方法 |
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| 引用本文： | 陈一畅,胡静. 斜视合成孔径雷达的稀疏降采样数据成像方法[J]. 吉首大学学报(自然科学版), 2016, 37(6): 34-37. DOI: 10.3969/j.cnki.jdxb.2016.06.008 |
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| 作者姓名： | 陈一畅 胡静 |
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| 作者单位： | （1.空军工程大学信息与导航学院，陕西 西安 710077；2.吉首大学商学院，湖南 吉首 416000；） |
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| 摘 要： | 针对合成孔径雷达数据量庞大，不便于存储传输等问题，结合经典的距离多普勒成像算法与压缩感知理论，提出一种稀疏降采样斜视SAR数据的成像方法.在方位向上用随机降采样的方式录取数据，对所得数据进行相应的距离徙动校正和距离脉压，随后将方位向脉压建模为典型的压缩感知模型，用平滑l0算法重构出二维SAR场景.利用该方法能有效地减少稀疏场景的SAR回波数据量，仅采用传统数据量的25%，即可获得清晰的二维成像结果.
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| 关 键 词： | 斜视合成孔径雷达 距离-多普勒算法 压缩感知 降采样 |
Imaging Method for Squint SAR with Sparse Down Sampling Data |
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| CHEN Yichang,HU Jing. Imaging Method for Squint SAR with Sparse Down Sampling Data[J]. Journal of Jishou University(Natural Science Edition), 2016, 37(6): 34-37. DOI: 10.3969/j.cnki.jdxb.2016.06.008 |
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| Authors: | CHEN Yichang HU Jing |
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| Affiliation: | (1.School of Information and Navigation，AFEU，Xi′an 710077，China；2.College of Business，Jishou University，Jishou 416000，Hunan China) |
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| Abstract: | A novel squint synthetic aperture radar imaging method with down sampling echo is proposed to solve the problem of huge SAR data transmission and storage.In this method，the echo is under-sampling in the azimuth，and the migration correction and range pulse compression are firstly performed by traditional Rang-Doppler algorithm，and then the azimuth focusing is completed by smoothed l0 algorithm according compressed sensing theory.This method can effectively reduce the amount of SAR echo data in sparse scenes，and obtain high resolution 2D imaging results with only 25% of the traditional data size. |
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| Keywords: | squint synthetic aperture radar range-Doppler algorithm compressed sensing down sampling |
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