| 弧形阵列3D-SAR成像处理算法研究 |
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| 引用本文： | 黄增树,孙进平,谭维贤,黄平平,乞耀龙.弧形阵列3D-SAR成像处理算法研究[J].信号处理,2019,35(4):523-530. |
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| 作者姓名： | 黄增树 孙进平 谭维贤 黄平平 乞耀龙 |
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| 作者单位： | 北京航空航天大学电子信息工程学院 |
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| 基金项目： | 国家自然科学基金（61471019, 61661043）；内蒙古自治区科技创新引导项目(KCBJ2017, KCBJ2018014)；内蒙古自治区自然科学基金资助项目（2016MS0606,2017JQ10）
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| 摘 要： | 三维合成孔径雷达(3D-SAR)能够获取观测场景目标的三维分辨,解决传统二维合成孔径雷达的叠掩、阴影等问题。不同于现有的3D-SAR成像几何,本文设计了一种新的基于弧形曲面几何的三维合成孔径雷达系统模型。相比于现有的3D-SAR成像系统,该系统能够利用弧形天线阵列实现高效的数据采集和宽视角三维成像。然后针对所设计的弧形阵列3D-SAR系统,本文提出了一种应用于调频连续波信号的波数域三维成像处理算法,通过波数域卷积及插值变换,避免了距离近似等产生的相位误差,从而实现对目标的精准聚焦。最后,通过进行计算机单点目标仿真与多目标仿真,并将仿真结果与后向投影算法的结果进行对比,验证了本文所设计系统模型的有效性及提出算法的良好成像性能。
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| 关 键 词： | 弧形阵列 合成孔径雷达 三维成像 波数域 |
| 收稿时间： | 2018-12-31 |
Research on Arc Array 3D-SAR Imaging Algorithm |
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| Huang Zengshu,Sun Jinping,Tan Weixian,Huang Pingping,Qi Yaolong.Research on Arc Array 3D-SAR Imaging Algorithm[J].Signal Processing,2019,35(4):523-530. |
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| Authors: | Huang Zengshu Sun Jinping Tan Weixian Huang Pingping Qi Yaolong |
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| Affiliation: | Electronics & Information Engineering,Beihang University |
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| Abstract: | Three-dimensional synthetic aperture radar (3D-SAR) can obtain the three-dimensional resolution of the objects in the observation scene and solve the problems such as layover and shadowing effects of traditional two-dimensional synthetic aperture radar. Different from the existing 3D-SAR imaging geometries, a new 3D-SAR imaging system based on arc surface geometry was designed in this paper. Compared with the existing 3D-SAR imaging system, the system can use arc antenna array to achieve efficient data acquisition and wide view extent. Then, with respect to the designed arc array 3D-SAR system, a three-dimensional wavenumber domain imaging algorithm applied to frequency modulation continuous wave signal was proposed, which can avoid distance approximation and achieve accurate target focus through convolution and interpolation transformation in wavenumber domain. Finally, single-point target and multi-target simulations were carried out. The validity of the designed system and the good imaging performance of the proposed algorithm are validated by comparing the results of our algorithm with the results of the back projection algorithm. |
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| Keywords: | arc array synthetic aperture radar three dimensional imaging wavenumber domain |
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