Estimation of GNSS Signals’ Nominal Distortions from Correlation and Chip Domain

Jean-Baptiste Pagot (1) , Paul Thevenon (1) , Olivier Julien (1) , Yoan Gregoire (2) , Francisco Amarillo-Fernandez (3) , Denis Maillard (4)

1 SIGNAV - ENAC Equipe TELECOM-SIGNAV
2 CNES - Centre National d'Études Spatiales [Toulouse]
3 ESA - Agence Spatiale Européenne = European Space Agency
4 Capgemini [Toulouse]

This paper analyses two ways to investigate nominal distortions of GNSS signals. Firstly, these perturbations can be observed from the correlation function point of view and secondly, from the CDO (Chip domain observable) which is a way to extract the shape of such distortions directly from the digitized signal samples using the code periodicity. This method is also known as the Vision Correlator (NovAtel). [1] These two techniques are compared in terms of capacity to observe and characterize GNSS signal nominal deformations. The CDO has the advantage to process only one specific part of the signal whereas the correlation function observable is less affected by the noise and is directly linked with the pseudorange estimation. As a conclusion, this publication proposes a new way to perform the Signal Quality Monitoring based on the Chip Domain Observable.

Domaines: Traitement du signal et de l'image [eess.SP]

Jean-Baptiste Pagot, Paul Thevenon, Olivier Julien, Yoan Gregoire, Francisco Amarillo-Fernandez, et al.. Estimation of GNSS Signals’ Nominal Distortions from Correlation and Chip Domain. ION ITM 2015, Proceedings of the 2015 International Technical Meeting of The Institute of Navigation, ION, Jan 2015, Dana Point, California, United States. ⟨hal-01120942⟩