Mitigation of Ionospheric Scintillation Effects on GNSS Signals with VMD-MFDFA

Severe scintillations degrade the satellite signal intensity below the fade margin of satellite receivers thereby resulting in failure of communication, positioning, and navigational services. The performance of satellite receivers is obviously restricted by ionospheric scintillation effects, which...

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Bibliographic Details
Published in:Remote sensing (Basel, Switzerland) Switzerland), 2019-12, Vol.11 (23), p.2867
Main Authors: Ahmed, Wasiu Akande, Wu, Falin, Marlia, Dessi, Ednofri, Ednofri, Zhao, Yan
Format: Article
Language:English
Subjects:
Accuracy
Bandwidths
Decomposition
Empirical analysis
Global navigation satellite system
Ionosphere
Noise
Radio signals
Receivers
Receivers & amplifiers
Remote sensing
Satellite communications
Scintillation
Signal processing
Time series
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Summary:Severe scintillations degrade the satellite signal intensity below the fade margin of satellite receivers thereby resulting in failure of communication, positioning, and navigational services. The performance of satellite receivers is obviously restricted by ionospheric scintillation effects, which may lead to signal degradation primarily due to the refraction, reflection, and scattering of radio signals. Thus, there is a need to develop an ionospheric scintillation detection and mitigation technique for robust satellite signal receivers. Hence, variational mode decomposition (VMD) is proposed. VMD addresses the problem of ionospheric scintillation effects on global navigation satellite system (GNSS) signals by extracting the noise from the radio signals in combination with multifractal detrended fluctuation analysis (MFDFA). MFDFA helps as a criterion designed to detect and distinguish the intrinsic mode functions (IMFs) into noisy (scintillated) and noise-free (non-scintillated) IMF signal components using the MFDFA threshold. The results of the proposed method are promising, reliable, and have the potential to mitigate ionospheric scintillation effects on both the synthetic (simulated) and real GNSS data obtained from Manado station (latitude 1.34° S and longitude 124.82° E), Indonesia. From the results, the effectiveness of VMD-MFDFA over complementary ensemble empirical mode decomposition with MFDFA (CEEMD-MFDFA) is an indication of better performance.
ISSN:2072-4292
2072-4292
DOI:10.3390/rs11232867