This paper discusses some technical problems and proposes a solution related to the implementation of a robust switching between single-side and double-side lobe tracking modes in case of BOC modulated signals, in particular BOC(M,N), with M, N > 1. It is demonstrated that typical group delay distortions due to wide-band front-end filters can potentially lead to code tracking biases, increasing the risk of false locks and degrading the performance of the BOC tracking loops. These effects represent also a potential problem for the coexistence of the side-lobe switching functionality with other advanced algorithms in professional-grade GNSS receivers. These practical issues are investigated and a possible solution is demonstrated by means of simulation results, considering the BOC(M,N) modulations in the Galileo E1a and E6a bandwidths.

Impact of the Group Delay on BOC(M,N) Tracking: Potential Filter Issues in Robust Side-Lobe Switching for High-Order BOC Modulations / Margaria, Davide; Falletti, Emanuela; Bagnasco, A.; Parizzi, F.; Torchi, A.. - ELETTRONICO. - (2013). ((Intervento presentato al convegno International Conference on Localization and GNSS 2013 (ICL-GNSS 2013) tenutosi a Torino, Italy nel June 25-27, 2013.

Impact of the Group Delay on BOC(M,N) Tracking: Potential Filter Issues in Robust Side-Lobe Switching for High-Order BOC Modulations

MARGARIA, DAVIDE;FALLETTI, EMANUELA;
2013

Abstract

This paper discusses some technical problems and proposes a solution related to the implementation of a robust switching between single-side and double-side lobe tracking modes in case of BOC modulated signals, in particular BOC(M,N), with M, N > 1. It is demonstrated that typical group delay distortions due to wide-band front-end filters can potentially lead to code tracking biases, increasing the risk of false locks and degrading the performance of the BOC tracking loops. These effects represent also a potential problem for the coexistence of the side-lobe switching functionality with other advanced algorithms in professional-grade GNSS receivers. These practical issues are investigated and a possible solution is demonstrated by means of simulation results, considering the BOC(M,N) modulations in the Galileo E1a and E6a bandwidths.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2508690
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