A combined iCEEMDAN and VMD method for mitigating the impact of ionospheric scintillation on GNSS signals

• Autorzy: Dey Abhijit , Chhibba Rohan , Ratnam Devananboyina Venkata , Sharma Nitin

Identyfikatory

DOI

10.1007/s11600-021-00629-y

• Języki publikacji: EN

Abstrakty

EN

Severe amplitude and phase scintillation induced by the ionospheric plasma density irregularities degrades the performance of global navigation satellite system (GNSS) receivers. Scintillation typically has adverse effects at the tracking process and thus adversely affects the raw GNSS measurements used in a number of applications. Hence, it is important to develop robust methodologies for detecting and mitigating ionospheric effects on the GNSS signals. In this paper, we propose a novel method based on the combination of improved complete ensemble empirical mode decomposition with adaptive noise (iCEEMDAN) and variational mode decomposition (VMD) methods. The proposed method employs a detrended fuctuation analysis (DFA)-based metric for robust thresholding between the scintillation-free and amplitude scintillated GNSS signals. The major contribution of the proposed method is development of novel approaches for selection of intrinsic mode functions (IMFs) based on DFA and optimised selection of [K, 훼] parameters of the VMD. The performance of the proposed method was evaluated and was observed that it is better than existing ionospheric scintillation effects mitigation algorithms for both simulated and real-time GPS scintillation datasets. The proposed method can denoise approximately 9.23–15.30 dB scintillation noise from the synthetic and 0.2–0.48 from the real scintillation index (S4) values. Therefore, the proposed (iCEEMDAN-VMD) method is appropriate for mitigating the ionospheric scintillation effects on the GNSS signals.

Słowa kluczowe

EN

global navigation satellite system; GNSS; CEEMDAN; variational mode decomposition; VMD; DFA; ionospheric scintillation; detrended fluctuation analysis

PL

globalny system nawigacji satelitarnej; GNSS; CEEMDAN; dekompozycja w trybie wariacyjnym; VMD; DFA

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2021
• Tom: Vol. 69, no. 5
• Strony: 1933--1948
• Opis fizyczny: Bibliogr. 38 poz.

Twórcy

autor

Dey Abhijit

• Department of Electrical and Electronics Engineering, Birla Institute of Technology and Science, Pilani, K.K. Birla Goa Campus, Goa 403726, India

• https://orcid.org/0000-0002-4478-1641

autor

Chhibba Rohan

• Department of Electrical and Electronics Engineering, Birla Institute of Technology and Science, Pilani, K.K. Birla Goa Campus, Goa 403726, India

autor

Ratnam Devananboyina Venkata

• Department of Electronics and Communication Engineering, Koneru Lakshmaiah Education Foundation, K L University, Vaddeswaram, Guntur, Andhra Pradesh 522502, India

• https://orcid.org/0000-0003-2222-2117

autor

Sharma Nitin

• Department of Electrical and Electronics Engineering, Birla Institute of Technology and Science, Pilani, K.K. Birla Goa Campus, Goa 403726, India

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