世界科技研究与发展 ›› 2023, Vol. 45 ›› Issue (3): 276-284.doi: 10.16507/j.issn.1006-6055.2023.03.002

所属专题: 卫星导航

• 卫星导航及应用 • 上一篇    下一篇

伪卫星系统关键技术发展及其应用

唐文杰1,2   陈俊平1,2   

  1. 1.中国科学院上海天文台,上海 200030;2.中国科学院大学天文与空间科学学院,北京 100102
  • 出版日期:2023-06-25 发布日期:2023-07-07
  • 基金资助:
    国家自然科学基金“卫星导航数据处理时空基准精化关键技术研究”(11673050)

Key Technology Development and Application of Pseudolite System

TANG Wenjie1,2   CHEN Junping1,2   

  1. 1 Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China; 2 School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100102, China
  • Online:2023-06-25 Published:2023-07-07

摘要:

全球导航卫星系统(GNSS)在隧道、室内、城市峡谷等复杂环境下服务性能明显降低。在此挑战环境下,伪卫星能用来生成和发送与GNSS 系统类似的信号,在GNSS 拒止环境下为用户提供位置、速度等不间断的导航信息。此外,可以将伪卫星体制调制成与GNSS一致,用户接收机实现伪卫星/GNSS同步接收,通过与GNSS、惯性导航系统等进行组合导航,实现复杂环境下的GNSS导航定位增强,有望在自动驾驶、室内导航、自动机器人等领域发挥重要作用。

关键词:

Abstract:

The service performance of the Global Navigation Satellite System (GNSS) has significantly decreased in complex environments such as tunnels, indoor and urban canyons. In this challenging environment, pseudolites can be used to generate and transmit signals similar to GNSS systems, providing users with uninterrupted navigation information such as location and speed in GNSS rejection environments. In addition, the pseudolite system can be modulated to be consistent with GNSS, and the user receiver can achieve synchronous reception of pseudolites/GNSS. Through integrated navigation with GNSS and inertial navigation systems, GNSS navigation and positioning enhancement in complex environments can be achieved, which is expected to play an important role in fields such as autonomous driving, indoor navigation, and automatic robots.

Key words: Pseudolite, Global Navigation Satellite System, Near-Far Effect, Multipath Effect, Atmospheric Delay, Time Synchronization