西安电子科技大学学报（自然科学版）2017，Vol.44Issue(1)：1-5,70,6.DOI:10.3969/j.issn.1001-2400.2017.01.001
一种加速时域成像算法及其自聚焦方法
Accelerated time domain imaging algorithm and its autofocus approach
摘要
Abstract
The measurement accuracy of a navigation system is inadequate for airborne synthetic aperture radar (SAR) . This may seriously degrade the image quality . In this paper , we propose an accelerated time domain ( ATD) imaging algorithm combined with the autofocus method . By introducing the global pseudo polarcoordinate(GPPC) ,weconstructtheFouriertransformpair(FTP) relationship.Then,theweighted least square phase gradient autofocus (WLS‐PGA) algorithm is adopted to implement accurate phase error compensation . This method uses fast Fourier transform to implement sub‐image fusions instead of time‐consuming two‐dimensional interpolation . Also , it has good compatibility with the high‐accuracy autofocus algorithm to estimate the residual motion errors within the radar echoes and to obtain a well‐focused image .关键词
合成孔径雷达/加速时域成像算法/傅里叶变换对/加权最小均方相位梯度自聚焦Key words
synthetic aperture radar(SAR)/accelerated time domain(ATD) imaging algorithm/Fourier transform pair(FTP)/weighted least square phase gradient autofocus(WLS-PGA)分类
信息技术与安全科学引用本文复制引用
曾乐天,梁毅,李震宇,怀园园,邢孟道..一种加速时域成像算法及其自聚焦方法[J].西安电子科技大学学报（自然科学版）,2017,44(1):1-5,70,6.基金项目
海洋公益性行业科研专项经费资助项目（201405001）；中央高校基本科研业务费专项资金资助项目（K5051302046）；航空科学基金与航空电子系统射频综合仿真航空科技重点实验室联合资助项目 （）
