Adaptive Tracking Algorithm of Weak GNSS Signal
- 10.2991/iwmecs-15.2015.39How to use a DOI?
- GNSS receiver; Carrier Tracking Loop(CTL); Adaptive; Carrier to Noise Ratio(CNR); Bandwidth
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.
- © 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/).
Cite this article
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 -