Two-Pole and Multi-Pole Notch Filters: A Computationally Effective Solution for GNSS Interference Detection and Mitigation

Borio, Daniele; Camoriano, L.; Presti, Letizia Lo

doi:10.1109/jsyst.2007.914780

Cited by 111 publications

(104 citation statements)

References 11 publications

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“…In recent years, IIR notch filters are considered for GNSS interference mitigation because of their low computational requirements, efficient implementation and low number of parameters to be adapted [11].…”

Section: Overview Of Notch Filtermentioning

confidence: 99%

“…Considering such a classification and in accordance with [11], for this kind of disturbing signals, the notch filter (NF) has proved to be an efficient mitigation technique, since it can be considered a good compromise between efficiency and complexity. When using a NF to remove narrowband interference, it has to consider its two parameters: notch frequency and notch bandwidth.…”

Section: Introductionmentioning

confidence: 99%

“…The notch bandwidth is the width of frequency region in which the signal power is reduced by 3 dB. The notch frequency can be adapted and track the interference frequency by using the Least mean square (LMS) algorithm [11]. However, the problem of determining the notch bandwidth has not been considered.…”

Section: Introductionmentioning

confidence: 99%

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An Adaptive Bandwidth Notch Filter for GNSS Narrowband Interference Mitigation

Nguyen

et al. 2015

REV-JEC

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Abstract-The low level of received signals power makes Global Navigation Satellite Systems (GNSS) receivers vulnerable to many classes of disturbing signals. Among them, narrow band interference (NBI) might cause serious receiver performance degradation. Cancellation of NBI can be implemented by using notch filters (NF), which are controlled by two parameters: the notch frequency, which specifies the band center, and the notch bandwidth, which defines the spectrum area to be removed. The literature on the topic focuses on adapting the notch frequency, without estimating the filter bandwidth. This paper proposes a method able to determine both the notch parameters, optimizing the interference suppression. The performance analysis shows a good improvement by using the adaptive bandwidth notch filter.

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Section: Overview Of Notch Filtermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An Adaptive Bandwidth Notch Filter for GNSS Narrowband Interference Mitigation

Nguyen

et al. 2015

REV-JEC

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“…The transfer function of the notch filter can be represented as . The first part is called the auto-regression (AR) block, whose role is compensation of the moving average (MA) block (Borio et al 2008). The second block refers to the MA block, which can remove the signal located on the interference center frequency.…”

Section: Adaptive Notch Filter Using Rlsmentioning

confidence: 99%

“…Detection and mitigation methods of the CWI by using the adaptive filter have been studied recently and can be classified into two approaches: time-domain (Cho & Lee 1993, Choi & Cho 2002, Borio et al 2008, Chien et al 2010) and frequency-domain approaches (Capozza et al 2000, Balaei & Dempster 2009). These approaches have a limitation on detection and mitigation of swept continuous wave interference, because its sweep rate degrades the signal tracking performance of the adaptive notch filter.…”

Section: Introductionmentioning

confidence: 99%

A GNSS Interference Detection Method Based on Multiple Ground Stations

Kim¹,

Kang²,

Yang³

et al. 2012

Journal of Positioning, Navigation, and Timing

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For a GNSS receiver's robustness against RFI and the high accuracy of navigation solution in GNSS, interference source detection and mitigation are needed. In this paper, an adaptive lattice IIR notch filter is employed to track single-tone continuous wave and swept continuous wave interference signals, and an interference detection method is proposed. Furthermore, this paper presents interference source characterization algorithm using multiple ground stations' interference detection results. The measurement of the signal powers from each ground station is used to build weighting factors to estimate the type of the interference. The performance of interference detection algorithm is simulated for scenarios of GPS signal in the presence of single-tone continuous wave interference and swept continuous wave interference.

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An efficient interference mitigation approach for NavIC receivers using improved variational mode decomposition and wavelet packet decomposition

Lorraine

Madhu

2021

Trans Emerging Tel Tech

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Reliable positioning, timing, and navigation services have become vitally important in safety and security applications. Hence, the need for Global Navigation Satellite Systems (GNSS) is growing continually. However, Continuous Wave Interference (CWI) was found to be one of the major potential threats of GNSS systems which degrades the receiver's performance. So, in this paper, a new approach using Improved Variational Mode Decomposition and Wavelet Packet Decomposition (IVMD‐WPD) has been proposed to mitigate CWI in NAVigation with Indian Constellation (NavIC) receivers. Although VMD is considered as an excellent signal analysis tool in decomposing non‐stationary and complex signals, the accuracy of the decomposition results depends upon the parameter setting. To address this, firstly, Normalized Kurtosis Energy Ratio (nKER) evaluation index is constructed. Then, the principle of nKER maximum is implemented to find the optimal parameters of VMD. Using the optimized parameters, the received signal is decomposed by IVMD into sub‐signals. Secondly, the mutual information index is introduced to extract the information dominant modes. The extracted modes are then processed by wavelet packet filter and finally, the desired signal is reconstructed. The proposed IVMD‐WPD method not only reduces the jamming efficiently but also overcomes the limitations of VMD. Moreover, by integrating IVMD with wavelet packet filter, the remaining effects of jamming and noise present in desired modes can be filtered thereby enhancing the performance. Simulation results reveal that the proposed method performs better in comparison with the conventional techniques in case of a single tone, multi‐tone, and chirp jamming environments.

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Two-Pole and Multi-Pole Notch Filters: A Computationally Effective Solution for GNSS Interference Detection and Mitigation

Cited by 111 publications

References 11 publications

An Adaptive Bandwidth Notch Filter for GNSS Narrowband Interference Mitigation

An Adaptive Bandwidth Notch Filter for GNSS Narrowband Interference Mitigation

A GNSS Interference Detection Method Based on Multiple Ground Stations

An efficient interference mitigation approach for NavIC receivers using improved variational mode decomposition and wavelet packet decomposition

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