一种新的BDS-BSAR多星融合目标监测算法  

A novel target detection algorithm with multi-satellites fusion based on BDS-BSAR

作　　者：韩冲 牛新亮[1] 雷博持 万贝 井成 HAN Chong;NIU Xinliang;LEI Bochi;WAN Bei;JING Cheng(China Academy of Space Technology(Xi’an),Xi’an 710000,China)

机构地区：[1]中国空间技术研究院西安分院,西安710000

出　　处：《空间电子技术》2021年第2期60-65,共6页Space Electronic Technology

摘　　要：近年来,基于卫星导航信号(GNSS)的双基地合成孔径雷达(GNSS-BSAR)以其低成本、实时的全球覆盖能力在遥感应用中发挥着越来越重要的作用。北斗导航卫星(BDS)作为GNSS系统的重要组成部分,以其更高的信号带宽为特点,理论上能够为SAR系统提供更高的分辨率。一种新的基于北斗GEO卫星导航信号的双基地合成孔径雷达(GEO-BDS-BSAR)卫星的多星融合目标监测算法,通过结合北斗GEO的信号特性以及相对稳定及几何构型,能够有效提高目标监测的分辨率,同时有效避免了传统基于全球导航信号的双基地合成孔径雷达(GNSSBSAR)系统的距离单元偏移误差校正处理,降低了传统反投影算法(BPA)的运算复杂度。通过仿真结果验证了该方法的可行性与有效性。In recent years,Bistatic Synthetic Aperture Radar(GNSS-BSAR)based on Satellite Navigation Satellite System(GNSS)plays an increasingly important role in remote sensing applications with its low cost and real-time global coverage.Beidou Navigation System(BDS),as an important part of GNSS system,can theoretically provide higher resolution for SAR system because of its higher signal bandwidth.In this paper,a novel target detection algorithm with multi-satellites fusion based on Beidou GEO(BDS-BSAR)is proposed,which effectively avoids the range cell migration error correction processing,reduces the complexity of interpolation processing in the traditional back projection algorithm(BPA)based on the traditional GNSS-BSAR system,and with the signal characteristics of Beidou GEO,the utilize of the proposed method can effectively improve the resolution of target.The simulation results show that the method has good performance.

关 键 词：双基地合成孔径雷达(BSAR) 北斗导航系统(BDS) 后向投影算法那(BPA) 多星融合 

分 类 号：TN911.4[电子电信—通信与信息系统]