全球导航卫星系统的稳定性:比较研究
Carlos Hernando-Ramiro1, Óscar Gamallo-Palomares1, Javier Junquera-Sánchez1
1Spanish National Institute for Aerospace Technology (INTA), Carretera de Ajalvir, km 4, 28850 Torrejón de Ardoz, Spain.
Sensors (Basel, Switzerland)
|March 17, 2025
概括
在具有挑战性的环境中,GPS提供了最可靠的TTFF (Time to First Fix) 性能. 这项研究比较了全球导航卫星系统 (GNSS) 信号,发现GPS在快速定位方面优越.
科学领域:
- 卫星导航系统 卫星导航系统
- 地理学工程 工程地质学
- 信号处理 信号处理
背景情况:
- 在需要快速定位的应用中,时间到首次修复 (TTFF) 非常重要.
- GNSS接收器性能,环境因素和卫星星座影响TTFF.
- 敌对的环境显著降低了TTFF,需要强大的信号评估.
研究的目的:
- 为了比较评估 BeiDou,利略,GLONASS 和 GPS 信号的强度,以应对不同的环境恶劣.
- 评估信号稳定性对大众市场GNSS应用中TTFF性能的影响.
- 在冷启动条件下使用单频低成本接收器分析TTFF.
主要方法:
- 在四个主要的GNSS星座中对TTFF绩效进行比较分析.
- 模拟恶劣的环境条件,以测试信号的强度.
- 使用典型的大众市场GNSS应用场景的评估,具有冷启动,单频和低成本接收器限制.
主要成果:
- 在测试的硬度级别中,GPS表现出最强大的TTFF性能.
- 在TTFF的稳定性方面,GLONASS跟随了GPS,尽管在定位准确性方面有所妥协.
- 与GPS和GLONASS相比,北斗和利略的TTFF稳定性较低.
结论:
- 与其他GNSS相比,GPS信号在不利条件下提供了优越的TTFF可靠性.
- 对环境恶劣的信号强度是GNSS TTFF性能的一个关键差异化因素.
- 选择GNSS影响TTFF,尤其对于时间敏感的大众市场应用来说至关重要.
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