Abstract
Ionospheric scintillation is the physical phenomena affecting radio waves propagating from the space through the ionosphere to earth. The signal distortion induced by scintillation can pose a major threat to some GNSS application. Scintillation is one of the more challenging propagation scenarios, particularly affecting high-precision GNSS receivers which require high quality carrier phase measurements; and safety critical applications which have strict accuracy, availability and integrity requirements. Under ionospheric scintillation conditions, GNSS signals are affected by fast amplitude and phase variations, which can compromise the receiver synchronization. To take into account the underlying correlation among different frequency bands, we propose a new multivariate autoregressive model (MAR) for the multi-frequency ionospheric scintillation process. Multi-frequency GNSS observations and the scintillation MAR are modeled in state-space, allowing independent tracking of both line-of-sight phase variations and complex gain scintillation components. The resulting joint synchronization and scintillation mitigation problem is solved using a robust nonlinear Kalman filter, validated using real multi-frequency scintillation data with encouraging results.
Highlights
Global Navigation Satellite Systems (GNSS) is the technology of choice for most position-related applications when it is available (Dardari et al, 2015)
The main challenges of GNSS technology arise when operating in complex, harsh propagation scenarios which are naturally impaired by multipath, shadowing, high dynamics, or ionospheric scintillation
The methodology in this paper is general for any GNSS signal, we focus on a modern GPS triple band satellite, which transmits on the L1, L2 and L5 frequencies
Summary
Global Navigation Satellite Systems (GNSS) is the technology of choice for most position-related applications when it is available (Dardari et al, 2015). In the last decade, ushered by an ever increasing demand for availability, accuracy, and reliability, the mitigation of these challenges has steered intense research on advanced receiver design (Amin et al, 2016). Among these challenges, in this paper we focus on ionospheric scintillation. In this paper we focus on ionospheric scintillation Because such disturbance is not related to the local environment, as in the case of multipath or shadowing, it can degrade receiver performance even under ideal open-sky conditions.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.