XAI GNSS-使用可解释的人工智能技术对GNSS中断信号质量评估的综合研究
1Vignan's Foundation for Science, Technology and Research, Guntur 522213, Andhra Pradesh, India.
Sensors (Basel, Switzerland)
|January 8, 2025
概括
可解释的人工智能模型通过识别用于检测干扰和伪造攻击的关键特性来增强全球导航卫星系统 (GNSS) 信号分析. 这提高了GNSS后处理中的故障检测和弹性.
科学领域:
- 导航和定位系统 导航和定位系统
- 信号处理 信号处理
- 人工智能的人工智能
背景情况:
- 全球导航卫星系统 (GNSS) 容易受到干扰和伪造攻击,降低信号质量.
- 有效的GNSS信号后处理需要在干扰和多路径条件下仔细分析.
- 识别信号中断对于保持GNSS接收器性能和可靠性至关重要.
研究的目的:
- 确定影响时间和光谱域特征,用于分析受各种干扰影响的GNSS信号.
- 评估可解释AI (XAI) 模型在GNSS信号分析特征选择中的有效性.
- 将基于XAI的特征选择与传统方法进行比较,以提高GNSS信号预测中的分类准确性.
主要方法:
- 在各种干扰场景下检查GNSS信号记录 (纯,CWI,MCWI,MP,伪造,脉冲,声).
- 应用机器学习 (ML) 技术来评估特征的重要性.
- 使用夏普利增量解释 (SHAP) 和局部可解释的模型不可知解释 (LIME) 进行特征分析和模型可解释性.
主要成果:
- XAI模型确定了关键的时间和光谱域特征,这些特征对于分类GNSS信号中断至关重要.
- 与传统的特征选择相比,使用SHAP和LIME选择的重要特征提高了分类准确性.
- 基于个体特征贡献的XAI模型为ML模型预测提供了明确的解释.
结论:
- XAI模型,特别是SHAP和LIME,为GNSS信号分析提供了卓越的特征选择,提高了分类准确性.
- 这些模型有效地揭示了黑子ML模型的决策过程,用于识别信号中断.
- 应用XAI有助于在GNSS的故障检测和弹性诊断,用于地面站的后处理.
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