| 平飞模式双站SAR的改进CS成像算法 |
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| 引用本文： | 陈晓龙,丁赤飚,梁兴东,吴一戎.平飞模式双站SAR的改进CS成像算法[J].测绘科学,2008,33(3):31-34. |
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| 作者姓名： | 陈晓龙 丁赤飚 梁兴东 吴一戎 |
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| 作者单位： | 中国科学院电子学研究所,北京,100080;中国科学院研究生院,北京,100039;中国科学院电子学研究所,北京,100080 |
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| 摘 要： | 本文针对机载双站SAR收、发系统分置的特点,首先建立了平飞模式双站SAR的回波信号模型,然后分析双站平飞正侧视下系统几何特点、距离徙动和距离徙动差以及距离多谱勒域距离向调频率的变化情况,并提出距离徙动差校正因子表达式和RD域距离向调频率的等效式,在此基础上结合单站的CS算法给出了双站平飞模式下的成像算法流程。最后通过实验仿真验证了本算法的正确性和可行性。
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| 关 键 词： | 双站SAR CS 信号相位 聚焦质量 |
| 文章编号： | 1009-2307(2008)03-0031-04 |
| 修稿时间： | 2007年1月23日 |
An improved CS imaging algorithm of bistatic SAR with a translational invariant configuration |
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| CHEN Xiao-long,DING Chi-biao,LIANG Xing-dong,WU Yi-rong.An improved CS imaging algorithm of bistatic SAR with a translational invariant configuration[J].Science of Surveying and Mapping,2008,33(3):31-34. |
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| Authors: | CHEN Xiao-long DING Chi-biao LIANG Xing-dong WU Yi-rong |
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| Abstract: | A signal model of a translational invariant configuration in airborne Bistatic SAR systems,which are characterized by spatially separated transmitters and receivers,is established in this paper.Through analyzing the system geometrical characteristic,the range cell migration,and the change of the linear FM rate in range direction in RD field,the expression of the CS factor and linear FM rate in range direction in RD field are proposed.On this condition,an imaging algorithm based on the CSA for Bistatic SAR with translational invariant configuration is get.At last the validity and the feasibility of applying the algorithm proposed by this paper is supported by point target simulation experiments. |
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| Keywords: | bistatic SAR CS signal phase focusing quality |
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