条带FMCW-SAR回波数据的二维频域模拟算法

马兵强; 于彬彬; 刘畅; 王岩飞

doi:10.3724/SP.J.1146.2010.00430

条带FMCW-SAR回波数据的二维频域模拟算法

doi: 10.3724/SP.J.1146.2010.00430

马兵强^{*①② 于彬彬,},
于彬彬,
刘畅,
王岩飞

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- 被引次数: 0
出版历程
- 收稿日期: 2010-04-29
- 修回日期: 2010-07-28
- 刊出日期: 2011-02-19

A 2-D Fourier Domain Algorithm for StripMap FMCW-SAR Raw Signal Simulation

Ma Bing-Qiang^{*①② 于彬彬
,},
Yu Bin-Bin,
Liu Chang,
Wang Yan-Fei

摘要

摘要: FMCW-SAR因其体积小、重量轻、成本低和高分辨率等优点近年来发展迅速，在低成本的民事应用领域具有广阔的发展前景。传统脉冲SAR的系统冲击响应函数不同于FMCW-SAR，因而，脉冲SAR的快速回波模拟算法不能直接应用于FMCW-SAR。该文在分析了条带FMCW-SAR信号特性的基础上，提出了其原始回波数据的2维频域快速模拟算法。该算法利用FFT快速实现了回波数据时域模拟方法中的距离向和方位向积分运算。与时域模拟方法相比，其计算效率提高了O(NaNr/log2(NaNr))个数量级。点目标回波数据的仿真实验验证了所提算法的合理性和有效性。
- 调频连续波合成孔径雷达(FMCW-SAR) /
- 回波数据模拟 /
- 2维频域
Abstract: Because of small size, lightweight, inexpensive and high-resolution, recently FMCW-SAR develops rapidly and has a great prospect in the cost-effective civil applications. The system transfer function of StripMap FMCW-SAR is different from that of pulsed SAR, therefore the efficient simulation approaches for pulsed SAR could not directly be applied to FMCW-SAR. Based on the analysis of the StripMap FMCW-SAR signal characteristics, a 2-D Fourier domain algorithm of the raw signal simulation for stripmap FMCW-SAR is proposed. The proposed algorithm computes the range and azimuth integration used in time-domain simulation method efficiently by FFT technique. With respect to the time-domain simulation, the computational load is reduced by the order of O(NaNr/log2(NaNr)). The rationality and effectiveness of the presented algorithm are verified with the simulation.
- Frequency Modulated Continuous Wave SAR (FMCW-SAR) /
- Echo data simulation /
- 2-Dimesional Fourier domain

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