国防科技大学学报2016，Vol.38Issue(3)：25-31,7.DOI:10.11887/j.cn.201603005
BDS 导航信号抗电离层闪烁载波跟踪的自适应卡尔曼滤波算法
Adaptive extended Kalman filter carrier tracking algorithm for BDS signals under ionosphere scintillation conditions
摘要
Abstract
Ionospheric scintillation is a rapid change in the phase and amplitude of navigation signals,resulting in degraded accuracy and robustness of signal tracking loops.Compared with the frequency tracking loop and delay tracking loop,carrier tracking loop is much weaker,and will lose lock much more continually in scintillation.Therefore,a carrier tracking algorithm for BeiDou signals scintillation mitigation based on adaptive EKF (extended Kalman filter)was proposed.The integration of in-phase and quadrature channels was used to estimate the phase lock indicator values which are the control parameter to adjust the measurement vector of EKF adaptively with different scintillation scenarios.Through the adaptive measurement vector,the accuracy and robustness of the tracking can be improved and the probability of filter divergence can be decreased.Experimental results prove the validity of the analysis and the proposed carrier tracking algorithm.关键词
电离层闪烁/相位锁定指示/自适应扩展卡尔曼滤波/鉴相误差/失锁概率Key words
ionosphere scintillation/phase lock indicator/adaptive extended Kalman filter/discriminator error/probability of loss-of-lock分类
天文与地球科学引用本文复制引用
孙鹏跃,唐小妹,陈华明,孙广富..BDS 导航信号抗电离层闪烁载波跟踪的自适应卡尔曼滤波算法[J].国防科技大学学报,2016,38(3):25-31,7.基金项目
国家自然科学基金资助项目 （）
