大斜视SAR原始数据的快速模拟算法研究
doi: 10.3724/SP.J.1146.2010.00498
Fast Algorithms for SAR Raw Data Simulation with Large Squint Angles
-
摘要: 该文针对小斜视和大斜视模式合成孔径雷达(SAR)提出了两种高效的原始数据模拟算法：变尺度傅里叶变换(SCFT)算法和沿距离向积分算法。基于SCFT的模拟算法将传统的基于2维快速傅里叶变换的2维频域算法推广到斜视模式，采用SCFT取代插值操作，提高了小斜视SAR原始数据模拟的计算效率和仿真精度。沿距离向积分算法适用于大斜视SAR原始数据模拟，保证了大斜视SAR原始数据的模拟精度并同时提高了计算效率。最后，通过仿真证明了这两种算法的有效性。Abstract: This paper presents two efficient algorithms for small squint and large squint mode Synthetic Aperture Radar (SAR) raw data simulation. One is based on SCaled Fourier Transform (SCFT) and the other is based on time-domain integration along range dimension. By SCFT the traditional frequency-domain algorithm with two-dimensional FFT is extended to small squint mode SAR. The algorithm employs SCFT to replace interpolation. The method improves both the computational efficiency and the simulation accuracy. Moreover, the proposed algorithm with time-domain integration along range dimension is applicable to large squint mode SAR. Compared with conventional time-domain technique, it is more efficient while still accurate. Simulation results demonstrate the validity of the two proposed algorithms.
-
Key words:
- Synthetic Aperture Radar (SAR) /
- Radar imaging /
- Squint mode SAR /
- Raw signal simulation
-
韦立登, 李绍恩, 吴一戎等. SAR原始回波信号生成算法的性能比较研究[J].电子与信息学报.2005, 27(2):262-265浏览[2]Wei Li-deng, Li Shao-en, and Wu Yi-rong, et al.. Performance comparison of algorithms for SAR raw signal generation[J].Journal of Electronics Information Technology.2005, 27(2):262-265[7]黄立胜, 王贞松, 郑天垚. 基于FFT的快速SAR分布目标回波模拟算法[J].遥感学报.2004, 8(2):128-136[9]Ahmed Shaharyar Khwaja and Laurent Ferro-Famil. Efficient SAR raw data generation for anisotropic urban scenes based on inverse processing[J].IEEE Geoscience and Remote Sensing Letters.2009, 6(4):757-761[10]唐晓青, 向茂生, 吴一戎. 考虑基线抖动的双天线干涉SAR原始回波仿真[J].电子与信息学报.2009, 31(8):1856-1861浏览[11]Tang Xiao-qing, Xiang Mao-sheng, and Wu Yi-rong. SAR raw signal simulation of dua-antenna InSAR accounting for baseline oscillations[J].Journal of Electronics Information Technology.2009, 31(8):1856-1861[12]Xia Wei-jie and Zhou Jian-jiang. A raw signal simulator for bistatic SAR[J].Chinese Journal of Aeronautics.2009, 22:434-443[14]Yue Hai-xia and Yang Ru-liang. A novel method of SAR real scenario raw data frequency-domain simulation[J].Journal of Electronics Information Technology.2006, 11(28):2015-2018[15]Franceschetti G, Migliaccio M, and Riccio D, et al.. SARAS: a synthetic aperture radar (SAR) raw signal simulator[J].IEEE Transactions on Geoscience and Remote Sensing.1992, 30(1):110-123[16]Franceschetti G and Lanari R. A new two-dimensional squint mode SAR processor[J].IEEE Transactions on Aerospace and Electronic Systems.1996, 32(2):854-863 -
计量
- 文章访问数: 3848
- HTML全文浏览量: 93
- PDF下载量: 725
- 被引次数: 0
下载:
