An Improved Tracking Architecture for Weak GNSS Signal Based on Moving Average Method

Abstract:

The research of robust tracking GNSS signal has been focused on increasingly in hash environment. In order to tracking weak GNSS signal, what an efficient approach is increasing coherent time. However, increasing coherent time brings several problems. It causes coherent loss and loop stability issues. This paper proposed an improved tracking architecture based on moving average method, a complex loop filter for the architecture is not considered, but the moving average method before frequency discriminator for a frequency lock loop is introduced. Compared with typical tracking loop, the coherent time is different from loop update interval in the method. Increasing the coherent time reduces the output error of frequency discriminator, and the loop noise bandwidth is increased in shorter loop update interval. Hence, use of such type of scheme provides higher dynamics for weak signal tracking. The simulation results are shown to verify the performance of the methods.

• Periodical: Applied Mechanics and Materials (Volumes 602-605)
• Pages: 1571-1575
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.602-605.1571
• Online since: August 2014
• Authors: Jun Liang Liu*, Hua Bing Wu, Zai Min He, Yong Hui Hu
• Keywords: Coherent Integration, Loop Update Interval, Moving Average Method, Tracking Loop, Weak Signal

References

[1] D. Borio and G. Lachapelle: A Non-Coherent Architecture for GNSS Digital Tracking Loops, Annales des Télécommunications, Vol. 64 (2009), p.601.

DOI: 10.1007/s12243-009-0114-1

[2] P.L. Kazemi: Optimum Digital Filters for GNSS Tracking Loops, In Proc. of ION GNSS 2008, Savannah, Vol. 8 (2008).

[3] D. Peral-Rosado, J. A. López-Salcedo, G. Seco-Granados, J. M. López-Almansa, and J. Cosmen: Kalman filter-based architecture for robust and high-sensitivity tracking in GNSS receivers, Satellite Navigation Technologies and European Workshop on GNSS Signals and Signal Processing (NAVITEC), 2010 5th ESA Workshop on. IEEE (2010).

DOI: 10.1109/navitec.2010.5708005

[4] M. Tahir, L.L. Presti and M. Fantino: A novel quasi open loop frequency estimator for GNSS signal tracking, Position Location and Navigation Symposium (PLANS), 2012 IEEE/ION, pp.952-960 (2012).

DOI: 10.1109/plans.2012.6236836

[5] M. Tahir, L.L. Presti and P.D. Torino: A Novel Parallel Carrier Tracking Architecture for Weak GNSS Signals, 25th International Technical Meeting of the Satellite Division of The Institute of Nvaigation, ION GNSS 2012, Nashville TN (2012).

DOI: 10.33012/2018.15990

[6] E. Kaplan and C. Hegarty (Eds. ): Understanding GPS: principles and applications, Artech house, Boston, London, 2nd edition (2005).