| 基于因式分解BP的车载前视地表穿透SAR快速成像算法 |
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| 引用本文： | 王建,张汉华,周智敏,宋千,金添. 基于因式分解BP的车载前视地表穿透SAR快速成像算法[J]. 国防科技大学学报, 2009, 31(1): 74-79 |
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| 作者姓名： | 王建 张汉华 周智敏 宋千 金添 |
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| 作者单位： | 国防科技大学,电子科学与工程学院,湖南,长沙,410073 |
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| 摘 要： | 车载前视地表穿透SAR(VMFL-GPSAR)属于双站SAR的范畴,采用单站快速因式分解BP(FFBP)处理存在较大的误差.针对双站SAR模型分析FFBP的距离误差,给出了极角采样率限制条件,提出了双站FFBP算法,通过合理设置子孔径中心提高聚焦效果,并结合距离相位补偿和线性插值技术,进一步提高聚焦精度.仿真和VMFL-GPSAR实际数据处理结果验证了双站FFBP算法,成像效率可提高2.31倍.
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| 关 键 词： | 双站 前视 地表穿透合成孔径雷达 快速因式分解后向投影 实时成像 |
| 收稿时间： | 2008-04-21 |
Fast Factorized Backprojection Algorithm for Vehicle-mounted Forward-looking Ground Penetrating SAR |
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| WANG Jian,ZHANG Hanhu,ZHOU Zhimin,SONG Qian and JIN Tian. Fast Factorized Backprojection Algorithm for Vehicle-mounted Forward-looking Ground Penetrating SAR[J]. Journal of National University of Defense Technology, 2009, 31(1): 74-79 |
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| Authors: | WANG Jian ZHANG Hanhu ZHOU Zhimin SONG Qian JIN Tian |
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| Affiliation: | College of Electronics Science and Technology;National Univ.of Defense Technology;Changsha 410073;China |
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| Abstract: | The vehicle-mounted forward-looking ground penetrating SAR(VMFL-GPSAR) is a kind of bistatic SAR.Fast factorized backprojection(FFBP) originally developed for unistatic SAR fails to efficiently form well-focused VMFL-GPSAR image.A bistatic FFBP algorithm is derived after the analysis of the round trip range error of FFBP in VMFL-GPSAR.In the bistatic FFBP,the range error can be reduced by rational subaperture center configuration and by polar angle interval constraint.Besides,by combining range phase compen... |
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| Keywords: | bistatic forward-looking ground penetrating SAR FFBP real-time image formation |
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