Adaptive Tracking Algorithm of Weak GNSS Signal

DOI

10.2991/iwmecs-15.2015.39How to use a DOI?

Keywords

GNSS receiver; Carrier Tracking Loop(CTL); Adaptive; Carrier to Noise Ratio(CNR); Bandwidth

Abstract

The receiver of a global navigation satellite system (GNSS) is likely to lose tracking for a GNSS signal in some degraded environments. To solve this problem, this paper designs a new adaptive tracking algorithm for GNSS signals. First, we design an error extraction module to extract phase errors so that a CTL can estimate phase errors without using a loop discriminator, which can reduce the requirements of the carrier-to-noise ratio (CNR) of GNSS signals. Second, we design a motion detection module to detect the real-time movement status of GNSS receivers. Then, using its detecting results as inputs, we design an algorithm to automatically make the CTL switch between a second-order loop and a third-order loop. Third, we design a bandwidth-adjusting module to adjust the bandwidth of CTL, according to the CNR and the movement status of a GNSS receiver. Finally, a simulation is performed to verify that our adaptive carrier tracking algorithm can effectively improve the precision of CTL, as well as enhance its dynamic range.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Faqin Gao
PY  - 2015/10
DA  - 2015/10
TI  - Adaptive Tracking Algorithm of Weak GNSS Signal
BT  - Proceedings of the 2015 2nd International Workshop on Materials Engineering and Computer Sciences
PB  - Atlantis Press
SP  - 210
EP  - 213
SN  - 2352-538X
UR  - https://doi.org/10.2991/iwmecs-15.2015.39
DO  - 10.2991/iwmecs-15.2015.39
ID  - Gao2015/10
ER  -