PT  - JOURNAL ARTICLE
AU  - Jordi Vilà-Valls
AU  - Nicola Linty
AU  - Pau Closas
AU  - Fabio Dovis
AU  - James T. Curran
TI  - Survey on signal processing for GNSS under ionospheric scintillation: Detection, monitoring, and mitigation
AID  - 10.1002/navi.379
DP  - 2020 Sep 21
TA  - NAVIGATION: Journal of the Institute of Navigation
PG  - 511--535
VI  - 67
IP  - 3
4099  - https://navi.ion.org/content/67/3/511.short
4100  - https://navi.ion.org/content/67/3/511.full
SO  - NAVIGATION2020 Sep 21; 67
AB  - Ionospheric scintillation is the physical phenomena affecting radio waves coming from the space through the ionosphere. Such disturbance is caused by ionospheric electron-density irregularities and is a major threat in Global Navigation Satellite Systems (GNSS). From a signal-processing perspective, scintillation is one of the most challenging propagation scenarios, particularly affecting high-precision GNSS receivers and safety critical applications where accuracy, availability, continuity, and integrity are mandatory. Under scintillation, GNSS signals are affected by amplitude and phase variations, which mainly compromise the synchronization stage of the receiver. To counteract these effects, one must resort to advanced signal-processing techniques such as adaptive/robust methods, machine learning, or parameter estimation. This contribution reviews the signal-processing landscape in GNSS receivers, with emphasis on different detection, monitoring, and mitigation problems. New results using real data are provided to support the discussion. To conclude, future perspectives of interest to the GNSS community are discussed.