Theoretical Evaluation of the GNSS Synchronization Performance Degradation under Interferences

Lorenzo Ortega, Jordi Vilà-Valls, Eric Chaumette

Peer Reviewed

Abstract:	Global Navigation Satellite Systems (GNSS) are a key player in a plethora of applications, ranging from navigation and timing, to Earth observation or space weather characterization. For navigation purposes, interference scenarios are among the most challenging operation conditions, which clearly impact the maximum likelihood estimates (MLE) of the signal synchronization parameters. While several interference mitigation techniques exist, a theoretical analysis on the GNSS MLE performance degradation under interference, being fundamental for system/receiver design, is a missing tool. The main goal of this contribution is to provide such analysis, by deriving closed-form expressions of the estimation bias, for a generic GNSS signal corrupted by an interference. The proposed bias are validated for a tone interference and a linear frequency modulation chirp interference.
Published in:	Proceedings of the 35th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2022) September 19 - 23, 2022 Hyatt Regency Denver Denver, Colorado
Pages:	3758 - 3767
Cite this article:	Ortega, Lorenzo, Vilà-Valls, Jordi, Chaumette, Eric, "Theoretical Evaluation of the GNSS Synchronization Performance Degradation under Interferences," Proceedings of the 35th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2022), Denver, Colorado, September 2022, pp. 3758-3767. https://doi.org/10.33012/2022.18564
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