Amplitude and Phase Errors Correction for Array 3D SAR System Based on Single Prominent Point Like Target Echo Data
Yang Xiao-lin①②③ Tan Wei-xian①② Qi Yao-long①② Wang Yan-ping①② Hong Wen①②
①(Institute of Electronics, Chinese Academy of Sciences (IECAS), Beijing 100190, China) ②(Science and Technology on Microwave Imaging Laboratory, Beijing 100190, China) ③(University of Chinese Academy of Science, Beijing 100049, China)
阵列3D SAR 技术以实孔径和合成孔径相结合的方式，实现对观测场景目标的3 维分辨。实际阵列SAR系统接收回波中不可避免地存在多通道幅相误差问题，直接成像处理会造成重建的雷达图像质量降级。该文建立了考虑幅相误差的阵列3D SAR 回波模型，提出了一种基于单特显点目标回波进行阵列幅相误差估计的方法，并针对阵列3D SAR 应用，提出了对幅相误差进行补偿的数据处理流程，最后通过仿真和实际数据处理对提出的模型和方法进行了验证。
The Array 3D SAR has the ability of resolving imaging in three dimensions using the novel combination of linear array antennas and synthetic aperture. A practical array SAR system has the problem of multi-channel amplitude and phase errors, which can degrade the quality of the reconstruction image. The echo model with amplitude and phase errors is presented. The effect of each errors are analyzed and a calibration method based on Single Prominent Point Like Target Echo Data is proposed. For the application of 3D imaging, the range migration algorithm with calibration scheme is also proposed. Simulations and real data processing are performed to validate the proposed calibration scheme.
杨晓琳, 谭维贤, 乞耀龙, 王彦平, 洪文. 基于单特显点目标回波的阵列3D SAR 幅相误差一致性校正方法研究[J]. 雷达学报, 2014, 3(4): 409-418.
Yang Xiao-lin, Tan Wei-xian, Qi Yao-long, Wang Yan-ping, Hong Wen. Amplitude and Phase Errors Correction for Array 3D SAR System Based on Single Prominent Point Like Target Echo Data. JOURNAL OF RADARS, 2014, 3(4): 409-418.
