西安电子科技大学学报（自然科学版）2018，Vol.45Issue(1)：145-149,167,6.DOI:10.3969/j.issn.1001-2400.2018.01.026
俯仰向DBF SAR系统通道相位偏差估计算法
Channel phase bias estimation algorithm for the DBF SAR system in elevation
摘要
Abstract
Due to the presence of phase bias between channels in elevation of the multichannel Synthetic Aperture Radar (SAR) system, the quality of the SAR images decreases after Digital Beam-Forming (DBF). In order to solve the problem, this paper presents a phase bias estimation algorithm for the multichannel SAR system in elevation. First, the complex interferograms are obtained by conjugate multiplication of the focused SAR images acquired by the adjacent channels. Then, the differential interferograms are obtained by conjugate multiplication of the adjacent interferograms.Finally,the phase bias between each channel and the reference one are estimated by the maximum sharpness optimization.The proposed algorithm is validated through experimental data acquired by the automobile based multichannel SAR system.关键词
合成孔径雷达/数字波束形成/通道相位偏差/最大对比度Key words
synthetic aperture radar/digital beam-forming/channel phase bias/maximum sharpness分类
信息技术与安全科学引用本文复制引用
王志斌,刘艳阳,李真芳,陈筠力..俯仰向DBF SAR系统通道相位偏差估计算法[J].西安电子科技大学学报（自然科学版）,2018,45(1):145-149,167,6.基金项目
国家自然科学基金资助项目(61471276,41371439,61601298) （61471276,41371439,61601298）
