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Multipath effects on vector tracking algorithm for GNSS signal

多径效应对GNSS信号矢量跟踪算法的影响

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Abstract

The vector tracking algorithm uses a single extended Kalman filter (EKF) to predict the time-delays and the Doppler deviations of the GNSS signal, while also estimating the user’s position, velocity, and clock state. In this paper, the effects of multipath on the tracking performance of the vector delay / frequency lock loop (VDFLL) is studied for better application in the multipath environment. The error expressions of the measurements are given in theory. The tracking error caused by multipath is reduced by VDFLL, which is proved by the tracking error of VDFLL through a new iterating method. The theoretical analysis is verified by the Monte Carlo simulation.

摘要

矢量跟踪算法使用一个单独的扩展Kalman滤波器(EKF)同时完成信号跟踪与导航解算。 为了更好的在多径环境下应用矢量跟踪算法, 研究了多径效应对VDFLL跟踪性能的影响。 理论推导出了多径效应造成的伪距与伪距率观测向量的误差表达式, 推导出了VDFLL的跟踪测量误差, 表明矢量跟踪算法减小了多径效应造成的跟踪测量误差。 Monte Carlo仿真结果对理论分析进行了验证。

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Authors and Affiliations

  1. School of Information and Electronics, Beijing Institute of Technology, Beijing, 100081, China

    Yu Luo, YongQing Wang, SiLiang Wu & Pai Wang

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  1. Yu Luo
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  2. YongQing Wang
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  3. SiLiang Wu
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  4. Pai Wang
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Correspondence to YongQing Wang.

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Luo, Y., Wang, Y., Wu, S. et al. Multipath effects on vector tracking algorithm for GNSS signal. Sci. China Inf. Sci. 57, 1–13 (2014). https://doi.org/10.1007/s11432-014-5153-1

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  • DOI: https://doi.org/10.1007/s11432-014-5153-1

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