| 引用本文: | 董臻,朱国富,梁甸农.BP成像算法的快速实现.[J].国防科技大学学报,2000,22(6):75-77.[点击复制] |
| DONG Zhen,ZHU Guofu,LIANG Diannong.The Fast Realization of BP Imaging Algorithm[J].Journal of National University of Defense Technology,2000,22(6):75-77[点击复制] |
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| BP成像算法的快速实现 |
| 董臻, 朱国富, 梁甸农 |
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(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: |
| BP（Back-Projection）算法是一种被广泛应用的SAR成像算法，它的突出优点是解决了大积累角情况下不可避免的距离迁移（range migration）问题。但由于计算量过大，使得它往往成为提高信号处理效率的瓶颈。本文充分利用轨道SAR地面实验中雷达运动轨迹的特点，通过消除BP算法中计算的冗余性，极大地降低了计算负担，提高了成像速度。本算法在实际应用中取得了良好效果。 |
| 关键词: BP算法 距离迁移 轨道SAR 平移不变性 对称性 |
| DOI： |
| 投稿日期：2000-06-20 |
| 基金项目:国家部委基金项目资助(7.5.3.2) |
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| The Fast Realization of BP Imaging Algorithm |
| DONG Zhen, ZHU Guofu, LIANG Diannong |
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(College of Electronic Science and Engineering, National Univ. of Defense Technology, Changsha 410073, China)
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| Abstract: |
| BP（Back-Projection）algorithm is a popular imaging algorithm of SAR.Although it can compensate the range migration which is inevitable in SAR imaging problem with wide processing-angle perfectly,its great computational burden makes it the bottle-neck in speeding up the signal-processing rate.By employing the characteristic of radar's track in Rail SAR,this paper removes the redundancy in BP algorithm to increase imaging rate greatly.This algorithm has achieved good effect in the experiment. |
| Keywords: BP algorithm range migration rail SAR, shift-invariability symmetry |
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