Enabling RTK Positioning Under Jamming: Mitigation of Carrier-Phase Distortions Induced by Blind Spatial Filtering

New GNSS applications demand resilience against radio interference and high position accuracy. Separately, these demands can be fulfilled by multi-antenna systems using spatial filtering and carrier-phase positioning algorithms like real-time kinematic (RTK), respectively. However, combining these a...

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Bibliographic Details
Main Authors: Bamberg, T. (Author), Konovaltsev, A. (Author), Meurer, M. (Author)
Format: Article
Language:English
Published: Institute of Navigation 2023
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Online Access:View Fulltext in Publisher
Description
Summary:New GNSS applications demand resilience against radio interference and high position accuracy. Separately, these demands can be fulfilled by multi-antenna systems using spatial filtering and carrier-phase positioning algorithms like real-time kinematic (RTK), respectively. However, combining these approaches encounters a severe issue: The spatial filtering induces a phase offset into the measured carrier phase leading to a loss of position accuracy. This paper pres-ents a new approach to compensate for the phase offset in a blind manner, (i.e., without knowing the antenna array radiation pattern or the direction of arrival of the signals). The proposed approach is experimentally validated in two jamming scenarios. One includes a jammer with increasing power and the other includes a moving jammer. The results demonstrate that the approach success-fully compensates for the phase offset and, hence, allows for the combined use of RTK positioning and spatial filtering even under jamming. Keywords. © 2023 Institute of Navigation.
ISBN:00281522 (ISSN)
ISSN:00281522 (ISSN)
DOI:10.33012/navi.556