GNSS 2×2 antenna array with beamforming for multipath detection

Global navigation satellite systems (GNSS) are subject to multipath or jamming and spoofing attacks. Although there are many proposed solutions, not all of them are tested practically. In this paper, we present experimental evaluation of 2×2 antenna array configuration with beamforming driven by sof...

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Bibliographic Details
Published inAdvances in space research Vol. 71; no. 10; pp. 4142 - 4154
Main Authors Razgūnas, Matas, Rudys, Saulius, Aleksiejūnas, Rimvydas
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.05.2023
Subjects
Beamforming
GNSS receivers
Multipath performance
Multiple antennas
Software-defined radio
Multipath performance
Beamforming
Software-defined radio
GNSS receivers
Multiple antennas
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Summary:Global navigation satellite systems (GNSS) are subject to multipath or jamming and spoofing attacks. Although there are many proposed solutions, not all of them are tested practically. In this paper, we present experimental evaluation of 2×2 antenna array configuration with beamforming driven by software-defined radio (SDR) for multipath mitigation. The proposed system performs spatial filtering of multipath coming from other directions than the direct satellite signals. For satellite direction estimation satellite ephemeris data is used. Several scenarios with different degree of multipath are studied. The use of beamforming increases receiver’s carrier-to-noise ratio up to about 8 dB and allows visibility of more GNSS satellites. Assembled from the low cost equipment such GNSS receiver could be used in many practical applications such as Internet of things devices or unmanned aerial vehicles.
ISSN:0273-1177
1879-1948
DOI:10.1016/j.asr.2022.12.035