A Spatial-Temporal Filter for Interference Mitigation in GNSS Receivers

E. Tasdemir, L. Kurz and T.G. Noll

Abstract:	Radio frequency interference (RFI) becomes a concerning issue for Global Navigation Satellite Systems (GNSS) due to the growing use of jamming devices. In this paper, a digital spatial-temporal filter for antenna-array GNSS-receivers is presented to mitigate RFI at pre-correlation stage. The filter combines a sub-space based spatial filter with a power minimizing temporal filter approach. While the latter mitigates narrowband interference in the temporal domain, the “valuable” spatial degrees of freedom are only used in the case of wideband interference. A cost comparison of the proposed spatial-temporal filter with the spatial-only filter is provided based on a VHDL implementation. The benefit of the combined filter approach over spatial-only filtering is demonstrated based on Matlab-simulations.
Published in:	Proceedings of the 27th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2014) September 8 - 12, 2014 Tampa Convention Center Tampa, Florida
Pages:	3502 - 3509
Cite this article:	Tasdemir, E., Kurz, L., Noll, T.G., "A Spatial-Temporal Filter for Interference Mitigation in GNSS Receivers," Proceedings of the 27th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2014), Tampa, Florida, September 2014, pp. 3502-3509.
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