| 基于最小二乘估计和小波去噪的ATI-SAR自适应相位校正方法 |
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| 引用本文： | 张焕胜, 祁海明, 杨汝良. 基于最小二乘估计和小波去噪的ATI-SAR自适应相位校正方法[J]. 电子与信息学报, 2007, 29(5): 1073-1076. doi: 10.3724/SP.J.1146.2005.01406 |
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| 作者姓名： | 张焕胜 祁海明 杨汝良 |
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| 作者单位： | 中国科学院电子学研究所,北京,100080;中国科学院研究生院,北京,100039;中国科学院电子学研究所,北京,100080 |
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| 摘 要： | ATI-SAR系统要求两个通道的相位特性准确匹配。该文分析了ATI-SAR系统相位误差的来源，建立了ATI-SAR系统相位误差的数学模型。提出了一种基于最小二乘估计和小波去噪的ATI-SAR自适应相位校正方法，给出了该相位校正方法的处理流程。计算机仿真证明在没有平台速度、偏航角等先验知识的情况下该方法仍可有效补偿ATI-SAR系统的相位误差，而且相位缠绕时，不需进行相位解缠。
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| 关 键 词： | 合成孔径雷达 动目标指示 沿迹干涉 最小二乘估计 小波去噪 |
| 文章编号： | 1009-5896（2007）05-1073-04 |
| 收稿时间： | 2005-11-03 |
| 修稿时间： | 2006-07-12 |
Phase Calibration Method for ATI-SAR System Based on Least Square Estimation and Wavelet-Denoising |
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| Zhang Huan-sheng, Qi Hai-ming, Yang Ru-liang. Phase Calibration Method for ATI-SAR System Based on Least Square Estimation and Wavelet-Denoising[J]. Journal of Electronics & Information Technology, 2007, 29(5): 1073-1076. doi: 10.3724/SP.J.1146.2005.01406 |
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| Authors: | Zhang Huan-sheng Qi Hai-ming Yang Ru-liang |
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| Affiliation: | Institute of Electronics, Chinese Academy of Sciences, Beijing 100080, China; Graduate University of Chinese Academy of Sciences, Beijing 100039, China |
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| Abstract: | ATI-SAR system requires that the phase characteristic of the two channels is precisely matched. This paper analyzes the phase error of ATI-SAR system, gives the mathematic model, proposes a simple phase calibration method for ATI-SAR system based on Least Square Estimation (LSE) and wavelet-denoising and gives the calibration flow. The simulation results demonstrated that the phase error of ATI-SAR system is removed by this method. This method does require any knowledge of the platform velocity and actual crab angle. The problem of wrapped interferometric phases can be resolved by iterative of this method. |
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| Keywords: | Synthetic Aperture Radar(SAR) Moving Target Indication(MTI) Along Track Interferometry(ATI) Least Square Estimation(LSE) Wavelet-denoising |
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