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基于机器学习的GNSS NLOS探测器的坚固设计具有多频特征
Omar García Crespillo1, Juan Carlos Ruiz-Sicilia1, Ana Kliman1
1Navigation Department, Institute of Communication and Navigation, German Aerospace Center (DLR), Oberpfaffenhofen, Germany.
Frontiers in robotics and AI
|August 14, 2023
概括
本研究引入了一种新的机器学习方法,用于准确检测全球导航卫星系统 (GNSS) 的非视线 (NLOS) 信号,这对于安全导航至关重要. 该方法增强了算法概括性,并提高了复杂环境中的检测准确性.
科学领域:
- * 导航系统 * 导航系统
- * 机器学习 * 机器学习
- * * 信号处理 信号处理
背景情况:
- * 全球导航卫星系统 (GNSS) 的非视线 (NLOS) 信号由于定位错误,对安全导航构成重大风险.
- * 城市环境呈现复杂的信号条件,挑战准确的GNSS信号分类.
- *机器学习 (ML) 提供了对GNSS视线 (LOS) /NLOS信号进行分类的潜力,但通用化仍然是一个挑战.
研究的目的:
- * 为准确的GNSS LOS/NLOS信号检测开发强大的ML算法.
- * 增强ML算法在各种场景和接收器配置中的通用化能力.
- *通过减轻NLOS信号引起的错误来提高GNSS定位安全性.
主要方法:
- *使用开放式天空模型进行特征预规范,以改进算法概括.
- * 设计一个分支 (并行) ML 过程,以利用多频GNSS测量.
- * 对二进制LOS/NLOS决策和概率估计的逻辑回归的应用.
主要成果:
- * 拟议的方法在评估的验证场景中实现了90%的检测准确性.
- * 带有预规范化的多频特征的分支后勤回归优于现有的最先进的算法.
- * 该方法有效地处理不同频率的间歇性GNSS特征.
结论:
- *开发的ML方法显著提高了GNSS NLOS信号检测的准确性和可靠性.
- * 预规范化和多频处理提高了算法概括性和性能.
- *这种方法为在具有挑战性的环境中提供了更可靠的导航系统的途径.
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