基于方位deramp和NFS大斜视聚束SAR成像算法

吴勇; 宋红军; 彭靳; 刘寒艳

doi:10.3724/SP.J.1146.2009.01274

基于方位deramp和NFS大斜视聚束SAR成像算法

doi: 10.3724/SP.J.1146.2009.01274

吴勇^{①② 宋红军,},
宋红军,
彭靳,
刘寒艳

计量
- 文章访问数: 3762
- HTML全文浏览量: 109
- PDF下载量: 718
- 被引次数: 0
出版历程
- 收稿日期: 2009-09-25
- 修回日期: 2010-01-29
- 刊出日期: 2010-09-19

Imaging Algorithm of High Squint Spotlight SAR Based on Azimuth Deramp and Nonlinear Frequency Scaling(NFS)

Wu Yong^{①② 宋红军
,},
Song Hong-Jun,
Peng Jin,
Liu Han-Yan

摘要

摘要: 该文针对聚束SAR回波信号方位向频谱混叠和大斜视时距离向和方位的严重耦合，提出了一种结合方位向deramp和非线性频率变标(NFS)的斜视聚束SAR成像算法。首先在方位向进行deramp操作，消除方位频谱混叠。然后通过非线性频率变标并考虑距离向时频变换的标度变化补偿方位相位，实现场景成像。仿真结果表明，该算法可有效消除方位频谱混叠，具有较高的精度，满足大斜视聚束SAR的成像要求和较大测绘带宽度要求。
- 聚束合成孔径雷达 /
- 方位deramp /
- 非线性频率变标 /
- 大斜视
Abstract: To eliminate the azimuthal spectral folding of spotlight Synthetic Aperture Radar (SAR) and the serious coupling between range and azimuth in high squint mode, an algorithm based on azimuth deramp and Nonlinear Frequency Scaling (NFS) is proposed. First, azimuth deramp operation eliminates the azimuthal spectral folding. Then nonlinear frequency scaling compensating the azimuth phase with the range scale variation is adopted to fulfill the focusing of the swath. Simulation results illustrate that it can eliminate azimuthal spectral folding, possess high precision and satisfy the imaging quality of high squint spotlight SAR and large scene swath.
- Spotlight SAR /
- Azimuth deramp /
- Nonlinear Frequency Scaling (NFS) /
- High squint

HTML全文

参考文献(1)

Lanari R, Tesauro M, and Sansosti E, et al.. Spotlisht SAR data focusing based on a two-step processing approach[J].IEEE Transactions on Geoscience and Remote Sensing.2001, 39(9):1993-2004[2]Reigber A, Alivizators E, and Potsis A, et al.. Extended wavenumber-domain synthetic aperture radar focusing with integrated motion compensation[J].IEE Proceedings: Radar, Sonar and Navigation.2006, 153(3):301-310[3]Davidson G W, Cumming I G, and Ito M R. A chirp scaling approach for processing squint mode SAR data[J].IEEE Tranctions on Aerospace and Electronic Systems.1996, 32(1):121-133[4]Jin Li-hua and Liu Xing-zhao. Nonlinear frequency scaling algorithm for high squint spotlight SAR data processing[J]. EURASIP Journal on Advances in Signal Processing, 2008, Article ID 657081: 1-8.[5]Guo Liang, Xing Mendao, and Tang Yu, et al.. A novel modified omega-k algorithm for synthetic aperture imaging lidar through the atmosphere[J].Sensors.2008, 8:3056-3066[6]井伟, 张磊, 邢孟道, 等. 聚束SAR的宽场景成像算法[J]. 电子学报, 2009, 37(3): 470-475.Jing Wei, Zhang Lei, and Xing Meng-dao, et al.. Algorithm for the wide-swath spotlight SAR data processing[J]. Acta Electronica Sinica, 2009, 37(3): 470-475.[7]Mittermayer J and Moreira A. Spotlight SAR data processing using the frequency scaling algorithm[J].IEEE Tranctions on Geoscience and Remote Sensing.1999, 37(5):2198-2214[8]梁毅, 王虹现, 邢孟道, 等. 调频连续波SAR信号分析与成像分析[J].电子与信息学报.2008, 30(5):1017-1021浏览Liang Yi, Wang Hong-xian, and Xing Meng-dao, et al.. The analysis of FMCW SAR signal and image study[J].Journal of Electronics Information Technology.2008, 30(5):1017-1021

施引文献

资源附件(0)

访问统计