一种改进的方位多通道SAR误差校正方法

doi:10.3969/j.issn.1001-2400.2017.03.003

西安电子科技大学学报

一种改进的方位多通道SAR误差校正方法

左绍山1,2;孙光才1,2;邢孟道1,2

(1. 西安电子科技大学雷达信号处理国家重点实验室，陕西西安 710071;
2. 西安电子科技大学信息感知技术协同创新中心，陕西西安 710071)

收稿日期:2016-06-12 出版日期:2017-06-20 发布日期:2017-07-17
作者简介:左绍山(1988-)，男，西安电子科技大学博士研究生，E-mail：zuoshaoshan@126.com
基金资助:
国家自然科学基金资助项目(61301292)；空间测控通信创新探索基金资助项目(201509A)

Improved channel error calibration method for the azimuth multichannel SAR

ZUO Shaoshan1,2;SUN Guangcai1,2;XING Mengdao1,2

(1. National Key Lab. of Radar Signal Processing, Xidian Univ., Xi'an 710071, China;
2. Collaborative Innovation Center of Information Sensing and Understanding, Xidian Univ., Xi'an 710071, China)

Received:2016-06-12 Online:2017-06-20 Published:2017-07-17

摘要/Abstract

摘要：

在方位多通道合成孔径雷达成像中，常根据多普勒模糊分量个数划分噪声子空间和信号子空间，并利用子空间的正交性来估计通道误差．为了避免模糊分量先验信息不准确对子空间划分和通道误差估计精度的影响，文中提出了一种改进的通道误差校正方法．该方法采用空间谱估计技术，估计出模糊分量个数、编号等信息，进而构造导向矢量和代价函数估计出通道误差，有效解决了模糊分量随基带频率变化时子空间划分不准确的问题，提高了成像质量．实测数据处理结果证明了文中算法的有效性．

关键词: 方位多通道合成孔径雷达, 通道误差, 子空间, 多普勒模糊

Abstract:

In multichannel synthetic aperture radar (SAR) imaging, the orthogonality of the noise subspace and the signal subspace is usually adopted to estimate the channel error. The division of the subspace is based on the number of ambiguity components. In order to avoid the effect of the inaccurate ambiguity components on the subspace division and the channel error estimation, an improved channel error calibration method is proposed, which can lead to the accurate information on the ambiguity components by the spatial spectrum estimation and calibrate the channel error precisely. The real data results validate the method.

Key words: azimuth multichannel SAR, channel error, subspace, Doppler ambiguity

左绍山;孙光才;邢孟道. 一种改进的方位多通道SAR误差校正方法[J]. 西安电子科技大学学报, 2017, 44(3): 13-18.

ZUO Shaoshan;SUN Guangcai;XING Mengdao. Improved channel error calibration method for the azimuth multichannel SAR[J]. Journal of Xidian University, 2017, 44(3): 13-18.

参考文献

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一种改进的方位多通道SAR误差校正方法

Improved channel error calibration method for the azimuth multichannel SAR

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