电子学报2024，Vol.52Issue(2)：602-613,12.DOI:10.12263/DZXB.20221046
基于改进SBR的舰船SAR成像快速仿真计算方法
A Fast SAR Imaging Simulation Method of Ship Targets Based on Improved SBR
摘要
Abstract
Aiming at the problem of low efficiency of electromagnetic scattering characteristics calculation in synthet-ic aperture radar(SAR)ship imaging simulation applications,two points of improvement based on the existing shooting and bouncing rays(SBR)technique are proposed in this work.Firstly,a ray tube intersecting surface panel detection algorithm with leaf node spatial neighborhood coding search is constructed,which effectively improves the intersection detection speed while avoiding missing intersecting panels by tracing only the center ray of the ray tube and searching for potential in-tersecting panels around the leaf node space.Secondly,a fast splitting technique for ray tube triangulation is introduced to project the ray tube and the intersecting panels to the ray tube's virtual aperture surface,and adaptively split the ray tube in-to consecutive sub-ray tubes by using the Delaunay triangulation algorithm.Finally,the radar cross section(RCS)calcula-tion and SAR imaging simulation experiments are carried out on typical ship targets.The experimental results show that un-der the premise of ensuring the accuracy,the efficiency of the proposed method is improved by more than 14 times than that of the Kd(K-dimension)tree accelerated SBR and by more than 3 times compared with the classical adaptive ray tube split-ting SBR,showing that the computational efficiency is significantly promoted.关键词
SAR成像仿真/SAR回波仿真/舰船RCS计算/弹跳射线法/自适应射线管分裂Key words
synthetic aperture radar(SAR)imaging simulation/SAR echo simulation/radar cross section(RCS)cal-culation of ship targets/shooting and bouncing rays(SBR)/adaptive ray tube splitting分类
数理科学引用本文复制引用
章琪琪,张寅,范君杰,夏翀翔,闫钧华..基于改进SBR的舰船SAR成像快速仿真计算方法[J].电子学报,2024,52(2):602-613,12.基金项目
中央高校基本科研业务费(No.NJ2022025) Fundamental Research Funds for the Central Universities(No.NJ2022025) （No.NJ2022025）
