电离层闪烁对卫星导航信号及性能的影响机理研究

项目名称： 电离层闪烁对卫星导航信号及性能的影响机理研究

项目编号： No.61301087

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 刘杨

作者单位： 北京航空航天大学

项目金额： 23万元

中文摘要： 目前, 我国具有独立自主知识产权的北斗二代导航系统已具备亚太地区的导航服务能力，北斗二代导航信号接收的测试和性能评估成为二代导航系统后期建设的主要攻关方向。我国空域约有三分之一处于电离层活动频繁的低纬度地区，该区域的电离层闪烁对卫星导航信号及性能具有较大影响。本课题将结合我国北斗二代卫星导航系统技术现状基础，从导航信号传播、接收和性能评估三个层面，深入研究我国空域范围内电离层闪烁对导航信号性能的影响机理，通过自适应支持向量机对不同程度闪烁信号进行分类，实现电离层闪烁下高准确度导航信号建模；通过交互式多模型导航信号跟踪构架实现电离层闪烁下导航信号高连续性跟踪；通过联合观测量的自主完好性监测实现电离层闪烁下导航完好性高可靠性评估。从而突破电离层闪烁下北斗二代导航信号接收和导航性能提升的关键技术，以扩展其导航应用领域，为复杂条件下飞机、车辆等机动载体的高安全性运行提供理论储备和技术支撑。

中文关键词： 电离层闪烁；卫星导航；多源观测数据；导航性能评估；

英文摘要： Currently the Beidou Satellite Navigation System (Beidou) has stepped into initial navigation service operation for the Asia-Pacific Region. Beidou navigation signal testing and performance evaluation are the main focus during the later stage Beidou system construction. Almost one third of China's airspace is located in low attitude, where most severe ionosphere activity exists. Ionospheric scintillation, one of such activity, has great influence on navigation signals and performance. Based on the current Beidou system technology and foundation, our project will deeply investigate the influence mechanism of ionospheric scintillation on navigation signals. The research is conducted from the aspects of ionospheric scintillation influences on navigation signal propagation, receiving and performance evaluation. Adaptive supportive vector machine (SVM) is adopted to classify navigation signals effected by ionospheric scintillation with different degrees, so as to build a high precision navigation signal model under scintillation; Interactive multiple model (IMM) is adopted to maintain continuous navigation signals tracking under scintillation; a joint code-carrier navigation observation architecture is designed to achieve robust navigation integrity evaluation under scintillation. Our goal is to break through the key

英文关键词： ionospheric scintillation；satellite navigation；multiple observation datasets；navigation performance evaluation；