收稿日期: 2014-04-01
修回日期: 2014-04-10
网络出版日期: 2015-01-15
基金资助
国家自然科学基金(61101201)资助
Polar format algorithm for multi-mode airborne SAR imaging
Received date: 2014-04-01
Revised date: 2014-04-10
Online published: 2015-01-15
刘龙珠 , 王岩飞 . 一种适合机载SAR变换模式的PFA成像处理方法[J]. 中国科学院大学学报, 2015 , 32(1) : 91 -96 . DOI: 10.7523/j.issn.2095-6134.2015.01.015
A high efficiency processing method for mode switch is proposed based on the requirements of airborne synthetic aperture radar (SAR). The features of the mode switch from stripmap to spotlight are well analyzed, and the precise echo signal model during the mode switch is established. By combining the processing steps by means of motion compensation, the polar format algorithm (PFA) is used for the multi-mode imaging. The processing results before and after the mode switch can be shared.Hence the processing efficiency is improved and hardware memory is reduced, which makes the method highly suitable for real-time imaging. Simulation results confirm the validity of the proposed method and show high efficiency.
[1] 周芳,刘玉战. 基于模式融合的混合SAR成像算法[J]. 火力与指挥控制, 2013, 38(5): 178-181.
[2] Belcher D P, Baker C J. High resolution processing of hybrid strip-map/spotlight mode SAR[J]. IEE Proc-Radar, Sonar Navig, 1996, 143(6): 366-374.
[3] 保铮,刑孟道,王彤.雷达成像技术[M]. 北京:电子工业出版社,2005: 24-30,70-87.
[4] 唐禹,王岩飞,张冰尘. 滑动聚束SAR成像模式研究[J]. 电子与信息学报, 2007, 29(1):26-29.
[5] 刘寒艳,宋红军,程增菊. 条带模式、聚束模式和滑动聚束模式的比较[J]. 中国科学院研究生院学报,2011, 28(3):410-417.
[6] Carrara W G, Goodman R S, Majewski R M. Spotlight synthetic aperture radar signal processing algorithms[M]. Boston: Artech House, 1995:357-360.
[7] Yeo T S, Tan N L, Lu Y H, et al. A Stripmap to spotlight converting algorithm[J]. Geoscience and Remote Sensing Symposium Proceedings, Seattle, 1998: 1 168-1 170.
[8] An D X, Huang X T, Jin T, et al. Extended two-step focusing approach for squinted spotlight SAR imaging[J]. IEEE Transactions on Geoscience and Remote Sensing, 2012, 50(7):2 889-2 900.
[9] Yuan Y, Sun J, Mao S. PFA algorithm for airborne spotlight SAR imaging with nonideal motions[J]. IEE Proc-Radar Sonar Navig, 2002, 149(4): 174-182.
[10] Walker J L. Range-doppler imaging of rotating objects[J]. IEEE Transactions on Aerospace and Electronic Systems, 1980, 16(1):23-52.
[11] Wei Y E. An efficient algorithm to correct range curvature image distortion in spotlight SAR[C]//EUSAR'98. 1998:123-126.
/
| 〈 |
|
〉 |
