在恶劣环境中使用测量估计来提高GNSS性能
Jae Hwan Bong1, Doyoung Kim1, Seongkyun Jeong1
1Department of Human Intelligence Robot Engineering, Sangmyung University, Cheonan, Korea.
PloS one
|September 27, 2023
概括
全球导航卫星系统 (GNSS) 的性能在城市地区由于信号阻塞而下降. 这项研究引入了新的技术,以保持准确的定位,即使在降低卫星可见性.
科学领域:
- 地理学工程 工程地质学
- 卫星导航系统 卫星导航系统
- 信号处理 信号处理
背景情况:
- 全球导航卫星系统 (GNSS) 对全球定位和定时至关重要,在商业和社会领域的应用日益扩大.
- 在城市峡谷等恶劣环境下,GNSS的性能显著下降,原因是信号阻塞和多路径错误,增加了导航解决方案的错误.
- 降低卫星可见度加剧了精度稀释 (DOP),直接影响基于GNSS的导航解决方案的准确性.
研究的目的:
- 提出和验证方法,以提高GNSS导航性能在信号退化环境.
- 为了减轻卫星可见度降低和多路径干扰对定位准确性的负面影响.
- 为了确保持续和可靠的导航能力,尽管环境挑战.
主要方法:
- 开发技术,包括范围差异,接收器时钟错误控制和虚拟卫星的利用.
- 通过在可见卫星减少的环境中进行模拟来验证拟议的方法.
- 在应用拟议技术之前和之后对导航性能进行比较分析.
主要成果:
- 模拟表明,拟议的方法有效地提高了在恶劣环境中的导航性能.
- 每种技术都有助于恢复导航准确性,创造了与正常操作环境相似的条件.
- 导航性能,虽然最初由于可见卫星的减少而恶化,但在应用拟议的方法后逐渐恢复.
结论:
- 提出的技术成功地保持连续导航性能,即使卫星信号被屏蔽.
- 这些方法为在具有挑战性的城市和受阻环境中可靠的GNSS运行提供了可行的解决方案.
- 通过这些信号处理和增强技术的战略应用,可以实现持续的导航精度.
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