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

J.B. Pagot, P. Thevenon, O. Julien, Yoan Gregoire, Francisco Amarillo Fernandez, Denis Maillard

Abstract:	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.
Published in:	Proceedings of the 2015 International Technical Meeting of The Institute of Navigation January 26 - 28, 2015 Laguna Cliffs Marriott Dana Point, California
Pages:	415 - 427
Cite this article:	Pagot, J.B., Thevenon, P., Julien, O., Gregoire, Yoan, Fernandez, Francisco Amarillo, Maillard, Denis, "Estimation of GNSS Signals’ Nominal Distortions from Correlation and Chip Domain," Proceedings of the 2015 International Technical Meeting of The Institute of Navigation, Dana Point, California, January 2015, pp. 415-427.
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