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基于最优区域划分的子块快速因子分解后向投影算法 被引量：4

An Sub-Image Fast Factorized Back Projection Algorithm Based on Optimal Regional Partition
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摘要 后向投影(Back Projection,BP)算法具有精确聚焦、完美运动补偿等优点,适合于机载超宽带合成孔径雷达(Ultra Wide Band Synthetic Aperture Radar,UWB SAR)成像,但是巨大的计算量限制了它的实际应用。子块快速因子分解后向投影算法(Sub-Image Fast Factorized Back Projection,SIFFBP)算法大幅度减小了BP算法的计算量,提高了BP算法的实用性。本文通过分析SIFFBP算法区域划分的约束条件,提出了一种基于最优区域划分的改进算法,解决了传统SIFFBP算法在小波束积累角时加速性能下降的问题。当波束积累角小于60度或成像区域长宽相差较大时,改进算法进一步减小了计算量。仿真和实测SAR数据的成像结果验证了改进算法的性能。 Back Projection （BP） algorithm is suitable for airborne Ultra Wide Band Synthetic Aperture Radar （UWB SAR） imaging for its advantages such as perfect focusing and motion compensation. However, its application will be limited by the big computation load. The Sub-Image Fast Factorized Back Projection （SIFFBP） algorithm, which substantially re- duces the computational load, can improve the practicability of the BP algorithm. In this article, an improved SIFFBP algo- rithm based on optimal regional partition is proposed by analyzing the regional division constraints. It provides a way to solve the acceleration-decline problem of the conventional SIFFBP algorithm when the SAR system has a small integration angle. The proposal can further reduce the computational load when the integration angle is smaller than 60 degree or when the length of the imaging region is much larger or smaller than the width. The performance of the proposal is demonstrated by u- sing simulated data, as well as real SAR data.
作者 林世斌 李悦丽 严少石 周智敏
机构地区 国防科技大学电子科学与工程学院
出处 《信号处理》 CSCD 北大核心 2012年第8期1187-1193,共7页 Journal of Signal Processing
关键词 快速因子分解后向投影 子块快速因子分解后向投影 超宽带合成孔径雷达 Fast Factorized Back Projection （FFBP） Sub-Image Fast Factorized Back Projection （SIFFBP） Ultra Wide Band Synthetic Aperture Radar （UWB SAR）
分类号 TN958 [电子电信—信号与信息处理]
  • 相关文献

参考文献18

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二级参考文献28

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共引文献18

同被引文献29

  • 1余洪涛,张永顺,朱丽莉.超宽带线性调频信号快速BP成像[J].现代雷达,2005,27(7):39-41. 被引量：3
  • 2余洪涛,童宁宁,田建峰.超宽带SAR成像的快速BP算法[J].空军工程大学学报（自然科学版）,2005,6(5):59-62. 被引量：4
  • 3李冉,皮亦鸣,张晓玲.基于改进BP算法的机载双基地SAR成像[J].雷达科学与技术,2006,4(6):348-352. 被引量：7
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  • 8Octavio Ponce, Pan Prats, Marc Rodriguez-Cassola, et al. Processing of circular SAR trajectories with fast factorized back-projection [ A ]. Geoscience and Remote Sensing Symposium ( IGARSS ) [ C ]. Vancouver, Canada: IEEE, 2011:3692-3695.
  • 9Zhao Shuqing, Wang Ruonan. A GPU based range- Doppler algorithm for SAR imaging in openCL [ A ]. Interrmtional Conference on Instrumentation, Measure- ment, Computer, Communication and Control[ C ]. Beijing, China :IEEE Press,2011:224-227.
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引证文献4

二级引证文献9

信号处理
2012年 第8期

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