高轨航天器GNSS信号传播链路建模与强度分析

doi:10.13700/j.bh.1001-5965.2017.0502

北京航空航天大学学报 ›› 2018, Vol. 44 ›› Issue (7): 1496-1503.doi: 10.13700/j.bh.1001-5965.2017.0502

高轨航天器GNSS信号传播链路建模与强度分析

柴嘉薪¹, 王新龙¹, 俞能杰², 王盾², 李群生³

1. 北京航空航天大学宇航学院, 北京 100083;
2. 航天恒星科技有限公司, 北京 100086;
3. 北京航空航天大学仪器科学与光电工程学院, 北京 100083

收稿日期:2017-07-25 出版日期:2018-07-20 发布日期:2018-07-25
通讯作者: 王新龙.E-mail:xlwon@163.com E-mail:xlwon@163.com
作者简介:柴嘉薪女,硕士研究生。主要研究方向：卫星导航、组合导航;王新龙男,博士,教授,博士生导师。主要研究方向：惯性导航、卫星(GPS)导航、天文导航、地磁导航、景象匹配导航、组合导航与信息融合、初始对准技术及精确制导技术。
基金资助:
国家自然科学基金（61673040，61233005）；航空科学基金（2015ZC51038）；天地一体化信息技术国家重点实验室开放基金（2015-SGⅡT-KFJJ-DH-01）

Modeling and intensity analysis of GNSS signal link for high-orbit spacecraft

CHAI Jiaxin¹, WANG Xinlong¹, YU Nengjie², WANG Dun², LI Qunsheng³

1. School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 100083, China;
2. Space Star Technology Co. Ltd., Beijing 100086, China;
3. School of Instrumentation Science and Opto-electronics Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China

Received:2017-07-25 Online:2018-07-20 Published:2018-07-25

摘要/Abstract

摘要： 在高轨环境下，由于卫星信号传播链路复杂、损耗衰减较大、信号强度不均匀给全球导航卫星系统（GNSS）应用带来新问题。本文建立了GNSS信号从发射端到高轨航天器接收终端的传播链路模型。通过全链路模拟和等价增益仿真，得到了高轨航天器接收信号强度的分布规律。在此基础上，比较分析了GNSS双星座、三星座和四星座联合导航系统的可用性，为高轨航天器GNSS信号特性分析、多模接收机的灵敏度选择、捕获跟踪算法的设计等工程应用提供理论参考。

关键词: 高轨航天器, 全球导航卫星系统(GNSS), 链路模型, 强度分布, 可用性

Abstract: In the application of global navigation satellite system (GNSS) in high-orbit environment, satellite signal propagation link is complex with large attenuation and non-uniform intensity distribution. These signal link characteristics influence theoretical analysis and engineering application. In order to solve these new problems,GNSS signal link model from GNSS transmitting antenna to high-orbit spacecraft receiver was established. Based on the signal link model,signal intensity distribution of high-orbit spacecraft was obtained by the equivalent gain overall link simulation. On this basis, the availability of dual constellation, three constellations or four constellations integrated GNSS was discussed and compared. It provides reliable theoretical basis for engineering applications such as GNSS signal characteristic analysis, sensitivity selection of multimode receiver and acquisition and tracking algorithm design.

Key words: high-orbit spacecraft, global navigation satellite system (GNSS), link model, intensity distribution, availability

中图分类号:

V249.32⁺8

柴嘉薪, 王新龙, 俞能杰, 王盾, 李群生. 高轨航天器GNSS信号传播链路建模与强度分析[J]. 北京航空航天大学学报, 2018, 44(7): 1496-1503.

CHAI Jiaxin, WANG Xinlong, YU Nengjie, WANG Dun, LI Qunsheng. Modeling and intensity analysis of GNSS signal link for high-orbit spacecraft[J]. JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2018, 44(7): 1496-1503.

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高轨航天器GNSS信号传播链路建模与强度分析

Modeling and intensity analysis of GNSS signal link for high-orbit spacecraft

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