| GEO SAR双频双通道动目标检测与参数估计 |
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| 引用本文： | 程威,张顺生.GEO SAR双频双通道动目标检测与参数估计[J].信号处理,2020,36(10):1744-1750. |
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| 作者姓名： | 程威 张顺生 |
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| 作者单位： | 电子科技大学电子科学技术研究院 |
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| 基金项目： | 国家自然科学基金（61671122） |
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| 摘 要： | 地球同步轨道合成孔径雷达（GEO SAR）在对动目标检测和成像方面更具优势，但随之而来的一些问题也需要进一步解决。本文提出了一种基于GEO SAR双通道双载频实现运动目标检测、成像和参数估计的方法。利用广义 Keystone 变换对杂波对消处理后的运动目标进行距离徙动校正，使用离散调频傅立叶变换（DCFT）结合牛顿迭代法搜索完成多普勒参数估计后，利用在不同工作频率下的求得的速度集合进行交集来解决快速运动目标速度模糊的问题。最后，仿真实验证明该方法的有效性。
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| 关 键 词： | 地球同步轨道 杂波抑制 广义Keystone变换 运动目标检测 参数估计 |
| 收稿时间： | 2020-06-04 |
Moving target detection and parameters estimation of dual-frequency/dual-channel GEO SAR |
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| Affiliation: | Research Institute of Electronic Science and Technology, University of Electronic Science and Technology of China |
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| Abstract: | Geosynchronous synthetic Aperture Radar (GEO SAR) has more advantages in moving target detection and imaging, but some problems need to be further solved. In this paper, a method of moving target detection, imaging and parameter estimation based on GEO SAR dual-channel and dual-carrier frequency is proposed. The generalized Keystone transform is used to correct the range migration of the moving target after clutter cancellation. After the Doppler parameters are estimated by discrete frequency modulated Fourier transform (DCFT) and Newton iterative method, the velocity sets obtained at different working frequencies are intersected to solve the problem of velocity ambiguity of fast moving targets. Finally, simulation results show that the method is effective. |
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