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Open AccessArticle

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

1
SNARS Research Group, School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China
2
School of Electronic and Information Engineering, Beihang University, Beijing 100191, China
*
Author to whom correspondence should be addressed.
Remote Sens. 2019, 11(23), 2867; https://doi.org/10.3390/rs11232867
Received: 26 October 2019 / Revised: 20 November 2019 / Accepted: 26 November 2019 / Published: 2 December 2019
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. View Full-Text
Keywords: variational mode decomposition (VMD); Global Navigation Satellite System (GNSS); ionospheric scintillation; multifractal detrended fluctuation analysis (MFDFA); complementary ensemble empirical mode decomposition (CEEMD); satellite communication; radio signal propagation variational mode decomposition (VMD); Global Navigation Satellite System (GNSS); ionospheric scintillation; multifractal detrended fluctuation analysis (MFDFA); complementary ensemble empirical mode decomposition (CEEMD); satellite communication; radio signal propagation
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MDPI and ACS Style

Ahmed, W.A.; Wu, F.; Marlia, D.; Ednofri; Zhao, Y. Mitigation of Ionospheric Scintillation Effects on GNSS Signals with VMD-MFDFA. Remote Sens. 2019, 11, 2867.

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