一种弹载SAR子孔径成像算法

江淮; 陈思; 赵惠昌; 汉敏; 张淑宁

doi:10.11999/JEIT161337

一种弹载SAR子孔径成像算法

doi: 10.11999/JEIT161337

1.
(南京理工大学电子工程与光电技术学院南京 210094）②(东南大学微波与毫米波重点实验室南京 210094)

基金项目:

国家自然科学基金(61301216)，江苏省自然科学基金(BK20160848)

计量
- 文章访问数: 1295
- HTML全文浏览量: 174
- PDF下载量: 212
- 被引次数: 0
出版历程
- 收稿日期: 2016-12-08
- 修回日期: 2017-05-09
- 刊出日期: 2017-10-19

Subaperture Imaging Algorithm for Missile-borne SAR

1.
(School of Electronic &
2.
(State Key Laboratory of Millimeter Waves, Southeast University, Nanjing 210094, China)

Funds:

The National Natural Science Foundation of China (61301216), The Natural Science Foundation of Jiangsu Province (BK20160848)

摘要

摘要: 弹载合成孔径雷达在子孔径信号处理时，由于运动的复杂性和距离方位的强耦合，增加了成像处理的难度。针对这一问题，该文分析了该成像体制下的距离徙动特性并引入二次调频函数进行统一距离徙动校正；在方位向处理上则通过频域投影补偿调频率空变。与传统算法相比，新算法可对子孔径回波进行更有效的成像与聚焦，仿真结果证明了算法的正确性和有效性。
- 弹载SAR /
- 子孔径成像 /
- 2维加速度 /
- 方位频域投影
Abstract: In the missile borne subaperture SAR mode, the complicate motion of the platform and the strong coupling between range and azimuth present substantial difficulty for echo data processing. To solve this problem, the range migration characteristics of the echo are analyzed and a secondary frequency function is introduced for uniform migration correction. During the azimuth processing, the azimuth frequency domain projection is applied to compensating the Doppler frequency modulation variation. Compared with the traditional algorithm, this proposed algorithm can focus the echo more effectively. Simulation results show the correctness and validity of the proposed algorithm.
- Missile-borne SAR /
- Subaperture imaging /
- 2-D acceleration /
- Azimuth frequency domain projection

HTML全文

参考文献(15)

YI Yusheng, ZHANG Linrang, LIU Nan, et al. Imaging algorithm for missile-borne SAR with diving acceleration based on series reversion[J]. Systems Engineering Electronics, 2009, 31(12): 2563-2568.

易予生, 张林让, 刘楠等. 基于级数反演的俯冲加速运动状态弹载SAR成像算法[J]. 系统工程与电子技术, 2009, 31(12): 2563-2568.

周鹏, 周松, 熊涛, 等. 基于级数反演的弹载SAR下降段CZT成像算法[J]. 电子与信息学报, 2010, 32(12): 1806-1808. doi: 10.3724/SP.J.1146.2010.00452.

ZHOU Peng, ZHOU Song, XIONG Tao, et al. A chirp-Z transform imaging algorithm for missile borne SAR with diving maneuver based on the method of series reversion[J]. Journal of Electronics Information Technology, 2010, 32(12): 1806-1808. doi: 10.3724/SP.J.1146.2010.00452.

周松, 包敏, 周鹏, 等. 基于方位非线性变标的弹载SAR下降段成像算法[J]. 电子与信息学报, 2011, 33(6): 1420-1426. doi: 10.3724/SP.J.1146.2010.01124.

ZHOU Song, BAO Min, ZHOU Peng, et al. An imaging algorithm for missile-borne SAR with downward movement based on azimuth nonlinear chirp scaling[J]. Journal of Electronics Information Technology, 2011, 33(6): 1420-1426. doi: 10.3724/SP.J.1146.2010.01124.

TANG Shiyang, ZHANG Linrang, GUO Ping, et al. An Omega-K algorithm for highly squinted missile-borne SAR with constant acceleration[J]. IEEE Geoscience and Remote Sensing Letters, 2014, 9(11): 1569-1602. doi: 10.1109/LGRS. 1014.2301718.

李震宇, 梁毅, 邢孟道, 等. 弹载合成孔径雷达大斜视子孔径频域相位滤波成像算法[J]. 电子与信息学报, 2015, 37(4): 954-959. doi: 10.11999/JEIT140618.

LI Zhenyu, LIANG Yi, XING Mengdao, et al. A frequency phase filtering imaging algorithm for highly squint missile- borne synthetic aperture radar with subaperture[J]. Journal of Electronics Information Technology, 2015, 37(4): 954-959. doi: 10.11999/JEIT140618.

ZENG Tao, LI Yinghe, DING Zegang, et al. Subaperture approach based on azimuth-dependent range cell migration correction and azimuth focusing parameter equalization for maneuvering high-squint-mode SAR omega-K algorithm for highly squinted missile-borne SAR with constant acceleration [J]. IEEE Geoscience and Remote Sensing, 2015, 53(12): 6719-6733. doi: 10.1109/TGRS.015.2447393.

LIU Gaogao, LI Peng, TANG Shiyang, et al. Focusing highly squinted data with motion errors based on modified non- linear chirp scaling[J]. IET Radar, Sonar and Navigation. 2013, 12(20): 568-612. doi: 10.1049/iet-rsn.2012.0134.

董祺, 孙光才, 杨泽民, 等. 直角坐标多级后投影聚束SAR成像算法[J]. 电子与信息学报, 2016, 38(6): 1482-1488. doi: 10.11999/JEIT150990.

DONG Qi, SUN Guangcai, YANG Zemin, et al. Cartesian coordinates factorized back-projection algorithm for spotlight SAR[J]. Journal of Electronics Information Technology, 2016, 38(6): 1482-1488. doi: 10.11999/JEIT150990.

吕幼新, 张明友, 向敬成. 降低线性调频脉冲压缩信号旁瓣的方法[J]. 电子科技大学学报, 1993, 22(4): 344-349.

LV Youxin, ZHANG Mingyou, and XIANG Jingchen. A method for reducing sidelobe of linear frequency modulated pulse compression signal[J]. Journal of University of Electronic Science and Technology of China, 1993, 22(4): 344-349.

施引文献

资源附件(0)

访问统计