基于方位向多通道星载ScanSAR的MCECS算法

杨威; 李春升; 陈杰; 王鹏波

doi:CNKI:11-2625/V.20111013.1436.005

基于方位向多通道星载ScanSAR的MCECS算法

doi: CNKI:11-2625/V.20111013.1436.005

北京航空航天大学电子信息工程学院, 北京 100191

基金项目: 教育部"新世纪优秀人才"支持计划资助项目(NCET-06-0166); 领航创新基金资助项目(YWF-10-01-A24)

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中图分类号: TN 957
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出版历程
- 收稿日期: 2010-05-13
- 网络出版日期: 2011-10-30

Multiple channels extended chirp scaling algorithm for spaceborne multi-channels data processing in ScanSAR mode

School of Electronics and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 针对如何实现星载合成孔径雷达(SAR,Synthetic Aperture Radar)超宽测绘带的问题,对多通道星载SAR扫描模式开展研究.在分析该模式特点的基础上提出了实现超宽测绘带的方法,并推导了多通道扫描模式成像处理算法(MCECS,Multiple Channels Extended Chirp Scaling).该算法利用内定标数据校正通道间的幅相不一致性,通过滤波方法完成了方位向非均匀采样信号的重构.在采用修正的天线长度进行"扇贝效应"校正以及精确聚焦处理后,通过求解四次方程的方法对图像进行快速地理编码,并完成图像的拼接.最后利用计算机仿真验证了算法的有效性.
- 合成孔径雷达 /
- 多通道天线 /
- 超宽测绘带 /
- 非均匀采样
Abstract: Aimed at the realization of ultra-wide-swath, the operation of spaceborne multi-channels synthetic aperture radar(SAR) systems in ScanSAR mode was studied. Based on the characteristic analysis of the mode, a new method of ultra-wide-swath was presented as well as the imaging algorithm (MCECS, multiple channels extended chirp scaling). The algorithm calibrates amplitude and phase difference among receive-channels by internal calibration data and reconstructs nonuniformly sampled signal in azimuth by filter banks. After Scalloping remedy by applying the amendatory length of antenna and accurate focusing, it enabled the subswaths combination after image geocoding by solving the quartic equation. Finally, computer simulations show the validity of the algorithm.
- synthetic aperture radar /
- multi-channels antenna /
- ultra-wide-swath /
- nonuniformly sample

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[1] 魏钟铨.合成孔径雷达卫星[M].北京:科学出版社,2001:145-172 Wei Zhongquan.Synthetic aperture radar satellite[M]. Beijing:Science Publishing House,2001:145-172 (in Chinese) [2] Currie A,Brown M A.Wide-swath SAR [J].IEEE Proceedings-F,1992,139(2):121-135 [3] Pau Prats,Adriano Meta,Rolf Scheiber,et al.A TOPSAR processing algorithm based on extended chirp scaling:evaluation with terraSAR-X data //Proceedings of 7th European Conference on Synthetic Aperture Radar.Friedrichshafen,Germany:ITG/VDE,2008:141-144 [4] Daniel De Lisle.RADSAT-2 program update //Proceedings of 7th European Conference on Synthetic Aperture Radar.Friedrichshafen,Germany:ITG/VDE,2008:39-43 [5] Adriano Meta,Pau Prats,Ulrich Steinbrecher,et al.TerraSAR-X TOPSAR and ScanSAR comparison //Proceedings of 7th European Conference on Synthetic Aperture Radar.Friedrichshafen,Germany:ITG/VDE,2008:227-280 [6] 杨威,陈杰.基于内定标信号的SAR系统性能测试评估方法[J].仪器仪表学报,2007,28(增刊):67-72 Yang Wei,Chen Jie.The analysis of radar system based on internal calibration signals[J].Chinese Journal of Scientific Instrument,2007,28(Supplement):67-72(in Chinese) [7] Blum R S,Melvin W L ,Wicks M C.An analysis of adaptive DPCA //Proceedings of the 1996 IEEE National Radar Conference.Michigan,USA:IEEE,1996:303-308 [8] 王鹏波,周荫清,陈杰,等.方位向非均匀采样对多通道天线星载SAR成像性能的影响[J].遥控遥测,2006,27(5):8-14 Wang Pengbo,Zhou Yinqing,Chen Jie,et al.Effect of the recurrent non-uniform sampling in the azimuth direction on multi-channel antenna space-borne SAR imaging performance[J].Journal of Telemetry,Tracking,and Command,2006,27(5):8-14(in Chinese) [9] Krieger G,Younis M,Gebert N,et al.Advanced concepts for ultra-wide-swath SAR imaging with high azimuth resolution //Proceedings of 7th European Conference on Synthetic Aperture Radar.Friedrichshafen,Germany:ITG/VDE,2008:79-83 [10] 黄岩,李春升,陈杰.高分辨率星载SAR改进Chirp Scaling成像算法[J].电子学报,2003,28(3):35-38 Huang Yan,Li Chunsheng,Chen Jie.Refined chirp scaling algorithm for high resolution spaceborne SAR imaging[J].Acta Electronica Sinica,2003,28(3):35-38 (in Chinese) [11] Curlander J C.Synthetic aperture radar systems and signal processing[M].Beijing:Publishing House of Electronics Industry,2006:259-279

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