A Novel Real-time Platform for Digital Beamforming with GNSS Software Defined Receivers

J. Arribas, D. Bernal, C. Fernández-Prades, P. Closas, J.A. Fernández-Rubio

Abstract:	Sources of accuracy degradation in Global Navigation Satellite Systems (GNSS) are well known, and their mitigation has deserved the attention of a number of researchers in latter times. While atmospheric-dependant sources (delays that depend on the ionosphere and troposphere conditions) can be greatly mitigated by differential systems external to the receiver’s operation, the multipath effect and interferences are location-dependant and remain as the most important causes of accuracy degradation in time delay estimation, and consequently in position estimation, becoming a challenging issue. The use of an antenna array receiver can exploit the spatial diversity as a possible solution for the mitigation of reflections that are highly correlated with the direct signal path, usually referred to as coherent multipath. An antenna-array based receiver can make use of Digital Beamforming (DBF) techniques, providing appealing spatial filtering capabilities. The goal of this paper is to provide details about the design and implementation of a novel real-time DBF platform for GNSS software receivers.
Published in:	Proceedings of the 22nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2009) September 22 - 25, 2009 Savannah International Convention Center Savannah, GA
Pages:	2329 - 2343
Cite this article:	Arribas, J., Bernal, D., Fernández-Prades, C., Closas, P., Fernández-Rubio, J.A., "A Novel Real-time Platform for Digital Beamforming with GNSS Software Defined Receivers," Proceedings of the 22nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2009), Savannah, GA, September 2009, pp. 2329-2343.
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