摘要
基于低轨卫星L频段通信信号的通导融合安全定位体制,能有效解决卫星导航在抗欺骗性、信号处理、抗干扰及安全性等方面的不足,是对现有北斗卫星导航系统的补充备份,能有效丰富卫星导航系统的应用场景。本文通过设计安全定位技术体制,采用L频段通导融合信号播发导航电文方式实现导航定位与授时。本文仿真研究了不同载噪比和接收机时钟漂移对安全定位精度的影响,结果表明接收机存在时钟漂移且载噪比为60dB-Hz的条件下,定位精度随可见卫星数量增多而得到改善。当可见卫星数为3时,定位精度可达5m,并通过研制硬件样机对实际性能进行了验证。本文设计的通导融合安全定位技术体制对未来我国卫星互联网建设与发展具有重要参考价值。
The communication and navigation fusion security positioning system based on the L-band communication signals of low-orbit satellites can effectively solve the shortcomings of satellite navigation in terms of anti-deception,signal processing,anti-interference and security.It is a supplementary backup to the existing Beidou satellite navigation system,which can effectively enrich the application scenarios of satellite navigation systems.This paper designs a safe positioning technology system and uses L-band fusion signals to broadcast navigation messages to achieve navigation positioning and timing.This paper simulates the impact of different carrier-to-noise ratios and receiver clock drift on positioning accuracy.The results show that when the receiver has clock drift and the carrier-to-noise ratio is 60dB-Hz,the positioning accuracy improves as the number of visible satellites increases.When the number of visible satellites is 3,the positioning accuracy can reach 5m,and the actual performance has been verified by developing a hardware prototype.The communication and navigation fusion security positioning technology system designed in this article has important reference value for the future construction and development of my country’s satellite Internet.
作者
伍蔡伦
郎兴康
王同
赵精博
孙洪驰
WU Cailun;LANG Xingkang;WANG Tong;ZHAO Jingbo;SUN Hongchi(China Electronics Technology Group Corporation 54Th Research Institute,Shijiazhuang 050081,China;State Key Laboratory of Satellite Navigation System and Equipment Technology,Shijiazhuang 050081,China)
出处
《空间电子技术》
2023年第6期118-124,共7页
Space Electronic Technology
基金
河北省自然科学基金项目(编号:D2023523003)。
关键词
通导融合
安全定位
卫星互联网
导航定位与授时
conduction fusion
secure positioning
satellite Internet
navigation positioning and timing
