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2021 | OriginalPaper | Chapter

A GNSS Loop Tracking Structure Based on Unscented Kalman Filter

Authors : Mingxing Gu, Yuan Hu, Minghui Mou, Shengzheng Wang, Wei Liu

Published in: China Satellite Navigation Conference (CSNC 2021) Proceedings

Publisher: Springer Singapore

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Abstract

In GNSS Vector Tracking (VT) receiver, the tracking loop information is used to update the navigation solution. Different from the traditional GNSS receiver, changes of phase and frequency in the tracking loop can affect navigation results directly. In order to improve the fluctuation of the carrier frequency, a GNSS loop tracking structure based on Unscented Kalman filter (UKF) is proposed in this paper. A frequency-locked loop system model is constructed, which includes the state and the measurement equations. The noise variance of each part is used to assist UKF to complete the carrier loop tracking. The experimental results show that the UKF-based tracking carrier algorithm can output stable pseudorange rate changes in weak signal environment. The carrier-to-noise ratio of UKF is higher than the traditional tracking method when the tracking loop lock successfully.

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Title: A GNSS Loop Tracking Structure Based on Unscented Kalman Filter
Authors: Mingxing Gu
Yuan Hu
Minghui Mou
Shengzheng Wang
Wei Liu
Publisher: Springer Singapore
Book: China Satellite Navigation Conference (CSNC 2021) Proceedings
Print ISBN: 978-981-16-3145-0

Electronic ISBN: 978-981-16-3146-7

Copyright Year: 2021
DOI: https://doi.org/10.1007/978-981-16-3146-7_23

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