LEO卫星接收天线对北斗三号MEO覆盖性分析  

Analysis of coverage of LEO satellite receiving antenna to BDs-3 MEO

作　　者：陈宜稳[1] 王峻 陈玲玲[2] 赵雯雯[2] 朱向鹏 CHEN Yiwen;WANG Jun;CHEN Lingling;ZHAO Wenwen;ZHU Xiangpeng(Beijing Institute of Tracking and Communication Technology,Beijing 100094,China;China Academy of Space Technology(Xi’an),Xi’an 710100,China)

机构地区：[1]北京跟踪与通信技术研究所,北京100094 [2]中国空间技术研究院西安分院,陕西西安710100

出　　处：《现代电子技术》2023年第3期105-108,共4页Modern Electronics Technique

摘　　要：低轨增强系统是将低轨卫星作为卫星导航系统的高精度天基监测站,与中高轨卫星定位系统形成互补,可增强定位的精度和完好性,助力构建GNSS全球天基监测网,同时通过提供高精度导航信号,助力提供全球准实时高精度服务。低轨导航增强系统处在同时同频全双工的工作状态,系统存在同频自干扰信号。针对该情况,首先,分析同频干扰对消技术对天基GNSS接收天线波束宽度的需求;其次,理论推导出GNSS接收天线与BDS-3 MEO卫星覆盖之间的关系,给出LEO卫星GNSS接收天线波束宽度最优值,该值既能最大限度降低同频干扰对消实现复杂度,又能实现LEO卫星作为导航增强的系统需求;最后通过工程实际证明该波束宽度的设置合理性,为后续实际工程起到一定的指导意义。The low-orbit enhancement system is a high-precision space-based monitoring station that uses low-orbit satellites as a satellite navigation system.It forms a complementation to the medium-and high-orbit satellite positioning systems,can enhance the accuracy and integrity of positioning,and help build a global space-based monitoring network for GNSS.By providing high-precision navigation signals,it helps to provide global quasi-real-time high-precision services.The LEO navigation enhancement system is in the working state of simultaneous co-frequency and full-duplex,and has co-frequency selfinterference signals.In view of this situation,the requirements of co-frequency interference cancellation technology on the beamwidth of the space-based are analyzed in this paper,and the relationship between the GNSS receiving antenna and the coverage of BDS-3 MEO satellite is derived theoretically,and the optimal value of the beam width of the GNSS receiving antenna for the LEO satellite is given,which can not only minimize the complexity of co-frequency interference cancellation,but also implement system requirements of LEO satellites as a navigation enhancement.The rationality of the setting of the beam width is proved by means of engineering practice.The research has a certain guiding significance for the follow-up practical engineering.

关 键 词：LEO卫星 GNSS接收天线 同频自干扰 MEO卫星 高精度导航 天基监测 覆盖性分析 

分 类 号：TN828.5-34[电子电信—信息与通信工程] V476[航空宇航科学与技术—飞行器设计]