距离徙动校正和斜地变换的实时算法研究

刘碧丹; 王岩飞; 韩松

doi:10.3724/SP.J.1146.2008.00192

距离徙动校正和斜地变换的实时算法研究

doi: 10.3724/SP.J.1146.2008.00192

刘碧丹^{①②;王岩飞},
王岩飞,
韩松

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出版历程
- 收稿日期: 2008-02-18
- 修回日期: 2008-05-21
- 刊出日期: 2009-05-19

A Real-time Associative Algorithm of RCMC and SRGR

Liu Bi-dan^{①②;王岩飞},
Wang Yan-fei,
Han Song

摘要

摘要: 距离徙动校正插值处理是距离多普勒域(RD)算法的重要步骤，图像校正中的斜地变换也需要插值处理，插值处理会对图像引入插值误差。该文分析了距离徙动校正和斜地变换的原理，推导出一种把两种处理结合实现的方法，该方法通过一次插值处理完成距离徙动校正和斜地变换。与传统的实现方法相比，该方法减少了图像中由于插值处理引入的误差，提高了图像处理的精度，并且很大程度上减少了运算量。采用机载SAR原始数据验证了该算法的有效性。该算法对于高分辨率SAR的大量数据的实时成像处理，具有较大的应用价值。
- 合成孔径雷达;距离徙动校正;斜地变换;插值处理
Abstract: The interpolation for Range Cell Migration Correction (RCMC) is an important step in Range Doppler (RD) algorithm. The Slant Range to Ground Range (SRGR) conversion also needs interpolation approach. The interpolation introduces errors to SAR imagery. The principles of RCMC and SRGR are analyzed in this paper. An efficiently associative algorithm of RCMC and SRGR is developed. The associative algorithm needs interpolation for RCMC and SRGR only once. Compared with the conventional implements, it has less interpolation error than conventional implements, improves the precision of image processing and reduces the computation load largely. Simulation results on real-world airborne SAR raw data show that the proposed algorithm outperforms the conventional implements. For better precision and less computation cost, the associative algorithm is helpful to real-time implementation for the high resolution SAR data imaging.

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Cumming I G and Wong F H. Digital Processing of SyntheticAperture Radar Data Algorithms and Implementation [M].First edition, Norwood, MA Artech House, Inc, 2005, Ch.4.[2]Lanari R and Fornaro G. A short discussion on the exactcompensation of the SAR range-dependent range cellmigration effect [J].IEEE Trans. on Geoscience and RemoteSensing.1997, 35(6):1446-1452[3]孙文峰, 陈安, 邓海涛, 等. 一种新的机载SAR图像几何校正和定位算法[J]. 电子学报, 2007, 35(3): 553-556.Sun Wen-feng, Chen An, and Deng Hai-tao, et al.. A novelgeometric calibration and target location algorithm forair-borne SAR image[J]. Acta Electronic Sinica, 2007, 35(3):553-556.[4]杜廷松, 沈艳君. 数值分析及实验[M]. 第一版, 北京: 科学出版社, 2006, 第2 章, 第5 章.[5]Raney R K, Runge H, and Bamler R, et al.. Precision SARprocessing using chirp scaling [J].IEEE Trans. on Geoscienceand Remote Sensing.1994, 32(4):786-798[6]Franceschetti G and Lanari R. Synthetic Aperture RadarProcessing [M]. First edition, New York, CRC Press, 1999:37-42.[7]Curlander J C and McDonough R N. Synthetic ApertureRadar Systems and Signal Processing [M]. First edition.[J].NewYork, JOHN WILEY SONS INC.1991,:-[8]Lidicky L and Hoogeboom P. A fast algorithm to computeband-limited interpolation from unevenly spaced sampleddata using K-nearest neighbor search [C]. 2006 IEEEConference on Radar, NY, USA, 24-27 April 2006: 252-255.[9]数学手册编写组. 数学手册. 北京: 高等教育出版社, 2006,第17 章.[10]Kwok R, Curlander J, and Pang S S. An automated systemfor mosaicking spaceborne SAR imagery [J].InternationalJournal of Remote Sensing.1990, 11(2):209-223[11]Curlander J C. Location of pixels in space-borne SARimagery [J].IEEE Trans. on Geoscience and Remote Sensing.1982, 20(3):359-364

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