基于快速后向投影的超宽带冰雷达数据成像算法  

Processing Algorithm Based on Fast Back-projection for Imaging of Ultra-WideBand Ice-sounding Data

作　　者：稂时楠 许奔 崔祥斌[2] LANG Shinan;XU Ben;CUI Xiangbin(Beijing University of Technology,Beijing 100124,China;Polar Research Institute of China,Shanghai 200136,China)

机构地区：[1]北京工业大学,北京100124 [2]中国极地研究中心,上海200136

出　　处：《电子与信息学报》2022年第4期1249-1256,共8页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(41941006,41606219,41776186);科技部重点研发计划(2019YFC1509102);北京教育委员会科研项目(KM201910005027);上海市科技计划项目(21ZR1469700)。

摘　　要：该文提出一种新的冰雷达成像算法,该算法可以在获得高分辨率冰下剖面图的同时,拥有较高的处理效率。该算法是一种基于快速后向投影的超宽带(UWB)冰雷达成像方法,其修正了多层媒质情况下的雷达与目标之间的距离,以及因多层媒质造成的距离徙动几何变化。该文分析了算法的原理,给出了算法实现的具体步骤,并将其应用于点目标仿真和航空冰雷达数据实验,验证了算法在冰下成像中的有效性。此外,将该方法与现有常用冰雷达算法的成像结果在方位向杂波抑制能力、计算时间和方位向分辨率3个方面进行了对比,证明该算法能够在不降低方位向杂波抑制能力和方位向分辨率的前提下,有效提高计算效率。A new algorithm for imaging of ice-sounding radar is proposed,which can obtain high-resolution subglacial profiles with high processing efficiency.This algorithm,which is a processing algorithm based on fast back-projection for imaging of Ultra-WideBand(UWB)ice-sounding radar,can correct the distance between radar and targets in multilayer media and the geometric variation of range migration caused by multilayer media.The theory of the algorithm is analyzed and the implementation steps of the algorithm are given in this paper,and the algorithm is applied to point targets simulation and ice-sounding data experiment,which verifies the effectiveness of the algorithm in imaging of ice-sounding data.Furthermore,the results of the proposed algorithm with those of the existing ice-sounding radar processing algorithms are compared in three aspect of azimuth clutter suppression ability,computing time and azimuth resolution ability,which verifies this algorithm can effectively improve the computational efficiency without reducing the azimuth clutter suppression ability and azimuth resolution.

关 键 词：合成孔径雷达 冰雷达数据 超宽带 快速后向投影 

分 类 号：TN957.52[电子电信—信号与信息处理]