利用一发多收的双基SAR构型解多普勒模糊成像
doi: 10.3724/SP.J.1146.2008.01230
Using STMR Configuration for Doppler Ambiguity Resolving Bistatic SAR Imaging
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摘要: 该文以方位平移不变的双基SAR为研究对象，分析了双基回波多普勒的距离空变性，提出了一种考虑多普勒空变性的双基解多普勒模糊算法。解模糊过程中利用数值计算得到不同距离对应各个多普勒频点模糊分量的导向矢量，然后进行空域滤波实现全多普勒谱的重构。最后结合已有的双基成像算法实现大场景高分辨率成像。数值仿真验证了算法的有效性。Abstract: This paper focuses on the translation-invariant bistatic SAR Doppler ambiguity resolving by using Single-Transmitter-Multiply-Receivers (STMR) mounted on different platforms. The range dependent Doppler in the bistatic configuration is analyzed, based on which a bistatic Doppler ambiguity suppression algorithm is proposed. The approach obtains the range dependent steering vectors of ambiguous signal components in the same Doppler bins by numerical calculation, and the spatial domain filtering is used to reconstruct the full bandwidth Doppler spectrum. Finally, the available bistatic imaging algorithms can be used to obtain the wide swath and high resolution SAR image. Simulation confirms the validity of the approach.
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Aguttes J P. The SAR train concept: Required antenna areadistributed over N smaller satellites, increase of performanceby N. Proc. IGARSS, Toulouse, France, Jul. 2003: 542-544.[2]Li Zhen-fang, Wang Hong-yang, Su Tao, and Bao Zheng.Generation of wide-swath and high-resolution SAR imagesfrom multichannel small spaceborne SAR systems[J].IEEETransactions on Geoscience Remote Sensing Letters.2005,2(1):82-86[3]邢孟道, 李真芳, 保铮, 王彤. 小卫星分布式雷达空时频成像方法. 宇航学报, 2005, 26(B10): 70-80.[4]Klemm R. Comparison between monostatic and bistaticantenna configuration for STAP[J].IEEE Transactions onAerospace Electronic Systems.2000, 36(2):596-608[5]Zhang Z, Xing M, Ding J, and Bao Z. Focusing the parallelbistatic SAR data using the analytic transfer function inwavenumber domain[J].IEEE Transactions on GeoscienceRemote Sensing.2007, 45(11):3633-3645[6]张贤达. 现代信号处理 [M]. 北京: 清华大学出版社, 2005:126-130.[7]Kim Janghyo and Younis Marwan. Wiesbeck Werner:Experimental performance investingation of digitalbeamforming on synthetic aperture radar. IEEEInternational IGARSS, 2008, Barcelona, Spain, 7-11 July2008, Vol.5: 176-179. -
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