| 一种北斗联合低轨星座的导航增强方法研究 |
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| 引用本文： | 李星,姜坤,董绪荣.一种北斗联合低轨星座的导航增强方法研究[J].无线电通信技术,2020(2):234-238. |
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| 作者姓名： | 李星 姜坤 董绪荣 |
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| 作者单位： | 1.北京跟踪与通信技术研究所;2.航天工程大学 |
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| 摘 要： | 单纯依靠北斗导航系统提供定位导航授时服务,存在卫星信号落地功率低、易受遮蔽和阻断的不足。针对此问题,研究了一种北斗联合低轨星座实现导航增强的系统架构;提出了一种新的适应严重遮蔽或干扰条件下,基于到达时间(TOA)和到达频率(FOA)联合观测的定位解算算法;对高中低轨混合星座条件下的覆盖特性和精度衰减因子进行了仿真分析。分析结果表明,用户可见星数平均增加了64.2%,位置精度衰减因子(PDOP)平均改善了28.7%。研究结果可为下一代北斗的论证设计与研制建设提供参考借鉴。
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| 关 键 词： | 北斗导航系统 定位导航授时体系 低轨星座 导航增强 |
A Navigation Augmentation Method Based on Combining BDS with LEO Constellation and Its Performance Analysis |
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| LI Xing,JIANG Kun,DONG Xurong.A Navigation Augmentation Method Based on Combining BDS with LEO Constellation and Its Performance Analysis[J].Radio Communications Technology,2020(2):234-238. |
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| Authors: | LI Xing JIANG Kun DONG Xurong |
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| Affiliation: | (Beijing Institute of Tracking and Telecommunication Technology,Beijing 100094,China;Space Engineering University,Beijing 101416,China) |
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| Abstract: | There are some shortcomings when simply relying on Beidou navigation system to provide positioning,navigation and timing services,because of the weak satellite signal power.In order to solve this problem,the system architecture of combining BeiDou navigation system with LEO constellation is studied,and a new navigation augmentation algorithm based on TOA and FOA joint observation is proposed,which adapts to severe occlusion and interference conditions.The coverage and its PDOP characteristics and precision factors are simulated and analyzed,and the quantitative conclusions of performance improvement are given.Research results can provide reference for the design and development of the next generation Beidou system. |
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| Keywords: | BeiDou Navigation System(BDS) Positioning Navigation and Timing(PNT)Architecture Low Earth Orbit(LEO)constellation Navigation Augmentation |
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