ARTEMISA: Preliminary Results of Advanced Receiver Techniques for Multipath Mitigation

A. Fernandez, J.A. Pulido, M. Wis, Pau Closas, Carles Fernandez-Prades, Francesca Zanier, Roberto Prieto-Cerdeira, Massimo Crisci

Abstract:	In this paper, we investigate multipath estimating tracking loops in urban scenarios, where this effect is known to be severe. A set of multipath estimating tracking loops are discussed, providing details on the implementation and computational cost, as well as comparisons to state-of-the-art techniques when different channel models are applied. Those tracking loops resort to nonlinear filtering, sequentially estimating the unknown states of the system (i.e., parameters of the LOSS and echoes) and providing robust pseudorange estimates Realistic computer simulation results are presented using a specifically developed simulator platform, based on the GRANADA FCM commercial toolbox for Simulink™ which simulates in an efficient way the complete chain of the navigation signal, until it arrives at the receiver and is de-spread by the correlators. Specific models for each of the advanced receiver techniques are implemented. The techniques are evaluated for GPS L1 C/A, in controlled multipath environment. A variety of environments and user dynamics are tested through a flexible channel model simulator which allows performing sensitivity analysis of the techniques with respect to shadowing and multipath effects in Land Mobile Satellite (LMS) applications. Results of the MEDLL and MEPF techniques compared against the DLL/PLL are presented. In addition to this, some lines for the ongoing work are also outlined as for example the Controlled Statistical Channel Model (CSCM)
Published in:	Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012) September 17 - 21, 2012 Nashville Convention Center, Nashville, Tennessee Nashville, TN
Pages:	1444 - 1453
Cite this article:	Fernandez, A., Pulido, J.A., Wis, M., Closas, Pau, Fernandez-Prades, Carles, Zanier, Francesca, Prieto-Cerdeira, Roberto, Crisci, Massimo, "ARTEMISA: Preliminary Results of Advanced Receiver Techniques for Multipath Mitigation," Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012), Nashville, TN, September 2012, pp. 1444-1453.
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