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一种SAR层析成像的RELAX改进算法 被引量：2

Improved RELAX Algorithm for SAR Tomography
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摘要 受分辨率限制及旁瓣影响,传统的傅里叶变换方法获取合成孔径雷达层析成像(SAR tomography)高度维图像时,难以获得满意的成像结果。本文在松弛(RELAX)算法的基础上提出了一种改进算法(IRELAX)来获得SAR层析成像的高度维像,通过Monte Carlo仿真对谱估计算法中的MUSIC,WSF,RELAX和IRELAX的性能进行了比较,结果表明本文提出的方法能够提高干涉相位估计精度,改善成像质量。 The elevation imaging of SAR tomography obtained by classic FFT method is limited by the resolution and the sidelobe problem,thus the imaging result is unsatisfying.Spatial spectrum estimation methods can obtain the lower sidelobe,the narrower spectrum and the higher resolution in the elevation direction with small number of the baseline.This paper proposes an improved algorithm of the RELAX,called the IRELAX,to obtain elevation imaging.Then,the performances of MUSIC,WSF,RELAX,IRELAX are compared with that of the Monte Carlo simulation.Simulation results confirm the validity of the IRELAX algorithm.Meanwhile,the proposed algorithm can obtain better imaging than the other algorithm.
作者 任笑真 杨汝良
机构地区 中国科学院电子学研究所 中国科学院研究生院
出处 《数据采集与处理》 CSCD 北大核心 2010年第3期302-306,共5页 Journal of Data Acquisition and Processing
关键词 合成孔径雷达层析成像 空间谱估计 松弛算法 SAR tomography spatial spectrum estimation RELAX algorithm
分类号 TN959 [电子电信—信号与信息处理]
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参考文献12

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同被引文献30

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  • 5Fomaro G, Serafino F, Soldovieri F. Three-dimensional focusing with multipass SAR data [ J ]. IEEE Transactions on Geoscience and Remote Sensing, 2003,41 (3) : 507 - 517.
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  • 7Gini F, Lombardini F, Montanari M. Layover solution in multibaseline SAR interferometry [ J ]. IEEE Transactions on Aerospace and Electronic Systems, 2002, 38 (4): 1344 - 1356.
  • 8Sun X L, Dong Z, Yu A X, et al. Robust phase correction method for SAR tomography via phase gradient autofocus [ C ]//Processing of IEEE International Geoscience and Remote Sensing Symposium, 2011.
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数据采集与处理
2010年 第3期

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