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SNR degradation in GNSS-R measurements under the effects of radio-frequency interference
Querol Borràs, Jorge; Alonso Arroyo, Alberto; Onrubia Ibáñez, Raúl; Pascual Biosca, Daniel; Hyuk, Park; Camps Carmona, Adriano José
Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. CTE-CRAE - Grup de Recerca en Ciències i Tecnologies de l'Espai; Universitat Politècnica de Catalunya. RSLAB - Grup de Recerca en Teledetecció
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Radio-frequency interference (RFI) is a serious threat for systems working with low power signals such as those coming from the global navigation satellite systems (GNSS). The spectral separation coefficient (SSC) is the standard figure of merit to evaluate the signal-to-noise ratio (SNR) degradation due to the RFI. However, an in-depth assessment in the field of GNSS-Reflectometry (GNSS-R) has not been performed yet, and particularly, about which is the influence of the RFI on the so-called delay-Doppler map (DDM). This paper develops a model that evaluates the contribution of intra-/inter-GNSS and external RFI effects to the degradation of the SNR in the DDM for both conventional and interferometric GNSS-R techniques. Moreover, a generalized SSC is defined to account for the effects of nonstationary RFI signals. The results show that highly directive antennas are necessary to avoid interference from other GNSS satellites, whereas mitigation techniques are essential to keep GNSS-R instruments working under external RFI degradation.
Peer Reviewed
Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica
Global Positioning System
Radio frequency
Signal to noise ratio
Satellites
Interference
Degradation
Global Positioning System
Sea surface
Radar
Woodward's ambiguity function (WAF)
Ambiguity
Delay-Doppler map (DDM)
Degradation
Generalized SSC (GSSC)
Global navigation satellite systems-reflectometry (GNSS-R)
Interference
Reflectometry
Radio-frequency interference (RFI)
Signal-to-noise ratio (SNR)
Spectral separation coefficient (SSC)
Wigner–Ville
GNSS (Sistema de navegació)
Sistema de posicionament global
Radiofreqüència
info:eu-repo/semantics/submittedVersion
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