基于GPS L5导频通道的GNSS-R SAR成像  

GNSS-R SAR imaging based on GPS L5 pilot channel

作　　者：孙婷[1] 焦瑞莉[1] 朱云龙[2] 赵燕玲 邓睿娟 SUN Ting;JIAO Ruili;ZHU Yunlong;ZHAO Yanling;DENG Ruijuan(School of Information and Communication Engineering,Beijing Information Science&Technology University,Beijing 100101,China;School of Electronics and Information Engineering,Beihang University,Beijing 100083,China)

机构地区：[1]北京信息科技大学信息与通信工程学院,北京100101 [2]北京航空航天大学电子信息工程学院,北京100083

出　　处：《北京信息科技大学学报（自然科学版）》2023年第1期62-69,共8页Journal of Beijing Information Science and Technology University

基　　金：国家重大科研仪器设备研制专项(41327803)。

摘　　要：为降低导航电文对利用全球导航卫星系统反射技术(global navigation satellite system-reflectometry, GNSS-R)进行合成孔径雷达(synthetic aperture radar, SAR)成像的影响,采用全球定位系统(global positioning system, GPS) L5导频通道即无数据通道的信号,通过后向投影(back projection, BP)算法进行成像。仿真和实验结果表明,与剥离导航电文的数据通道信号的成像相比,导频通道信号的使用无需考虑剥离电文操作,降低了信号处理复杂度;从图像对比上看,目标和背景得到更好的区分,信噪比提升,成像质量得到一定程度改善。In order to reduce the impact of navigation messages on synthetic aperture radar(SAR) imaging when using global navigation satellite system-reflectometry(GNSS-R),the global positioning system(GPS) L5 pilot channel, namely the signal of non-data channels, is used for imaging through the back projection(BP) algorithm.The simulation and experimental results show that, compared with the imaging of data channel signals of stripped navigation messages, the use of pilot channel signals does not need to consider the operation of stripped messages, which reduces the complexity of signal processing.From the perspective of image contrast, the target and background are better distinguished, the signal-to-noise ratio is improved, and the imaging quality is improved to a certain extent.

关 键 词：全球导航卫星系统反射技术(GNSS-R) 合成孔径雷达(SAR) 全球定位系统(GPS)L5 导航电文 导频通道 后向投影(BP)算法 

分 类 号：TN958.97[电子电信—信号与信息处理]