General method to mitigate the continuous wave interference and narrowband interference for GNSS receivers

Lv, Qingshui; Qin, Honglei

doi:10.1049/iet-rsn.2020.0115

Cited by 7 publications

(6 citation statements)

References 10 publications

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“…A large β value gave more accurate frequency estimates and JSR, but slower convergence and tracking [54] in H 𝑑1 (z). However, for H d2 (z), a large β gave a larger NB noise at the output but a smaller broadband noise [40]. The BER was quantified in terms of JSR changes.…”

Section: Simulation Results and Discussionmentioning

confidence: 99%

“…[13,15,39] proposed ANF methods based on a lattice form to mitigate the CWI. A low-complexity method based on a second IIR NF for GNSS to mitigate CWI was proposed in [40]. To reduce and mitigate CWI, ref.…”

Section: Related Workmentioning

confidence: 99%

“…In GNSS Inter-Satellite Links (ISLs), [38] proposed an adaptive NBI suppression approach based on the code-aided technique; [13,15,39] proposed ANF methods based on a lattice form to mitigate the CWI. A low-complexity method based on a second IIR NF for GNSS to mitigate CWI was proposed in [40]. To reduce and mitigate CWI, [41] presented a new low-complexity anti-jamming NF for general wireless communications, while [42] derived FIR excision filters that optimize receiver SNR for NB interference.…”

Section: Signal Modelmentioning

confidence: 99%

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Single and Multiple Continuous-Wave Interference Suppression Using Adaptive IIR Notch Filters Based on Direct-Form Structure in a QPSK Communication System

Gebali

Landry

2022

Applied Sciences

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The removal filter coefficients in this technique are dependent on the jammer’s power and its Instantaneous Frequency (IF) information, which can both be obtained in the time–frequency domain (adaptive filtering techniques). The dependence of the removing/reducing filter characteristics on the interference power is critical, as it allows an optimal trade-off between removal interference and the amount of self-noise generated by the filter. This trade-off is bounded by the two extreme cases of no notch filter (no self-noise) and full suppression (k1 = 1) for both low- and high-power jammer values. In this paper, a cascade second-order adaptive direct Infinite Impulse Response (IIR) Notch Filter (NF) with a gradient-based algorithm to suppress the Continuous-Wave (CW and MCW) interference is proposed for maximizing the receiver Signal-to-Noise Ratio (SNR) in a Quadrature Phase-Shift Keying (QPSK)-modulated signal. The suppression approach consists of two Adaptive IIR NFs (ANFs) based on a direct-form structure: the Hd1(z) and Hd1(z). The proposal in this work presents a low-complexity Time-Domain (TD) algorithm for controlling the update filter coefficient and notch depth. Simulation results demonstrate that the proposed approach represents an effective method for removing/reducing the impacts of CWI/MCWI, resulting in improved system performance for low- and high-power jammer values when compared with the case of full suppression (k1 = 1); furthermore, it also improves the notch filter’s output SNR for a given Jamming-to-Signal Ratio (JSR) value and Bit Error Ratio (BER) performance. For example, the SNR output of the proposed IIR NF was enhanced by 7 dB versus the case without a filter when Eb/No = 15 dB and JSR = −5 dB. The proposed method can detect and mitigate weak and strong jamming with JSR values ranging from −30 to 40 dB, and can track the hopping frequency interference. Moreover, an improved BER performance is seen as compared to the case without an IIR NF.

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Section: Simulation Results and Discussionmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Section: Signal Modelmentioning

confidence: 99%

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Single and Multiple Continuous-Wave Interference Suppression Using Adaptive IIR Notch Filters Based on Direct-Form Structure in a QPSK Communication System

Gebali

Landry

2022

Applied Sciences

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“…The TFF methods remove signal features in both the Time Domain (TD) and the Frequency Domain (FD) simultaneously, but the major concern with the FD method is computational complexity, which arises from FFT and IFFT in hardware. [10]. The methods are appropriate for NB jamming mitigation, such as Short Time Fourier transforms (STFT) [11], bilinear signal distribution [12], filter banks [13], and Wavelet Transforms (WT) [14] [15].…”

Section: Introductionmentioning

confidence: 99%

“…Also, [9] presented a technique using ANF to detect and mitigate MCWI in GPS. In [10], the ANF is used to mitigate both CWI and NB interference for GNSS.…”

Section: Introductionmentioning

confidence: 99%

Multi-Frequency Interference Detection and Mitigation Using Multiple Adaptive IIR Notch Filter with Lattice Structure

Gebali¹,

Landry²

2021

JCC

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Radio Frequency Interferences (RFI), such as strong Continuous Wave Interferences (CWI), can influence the Quality of Service (QoS) of communications, increasing the Bit Error Rate (BER) and decreasing the Signal-to-Noise Ratio (SNR) in any wireless transmission, including in a Digital Video Broadcasting (DVB-S2) receiver. Therefore, this paper presents an algorithm for detecting and mitigating a Multi-tone Continuous Wave Interference (MCWI) using a Multiple Adaptive Notch Filter (MANF), based on the lattice form structure. The Adaptive Notch Filter (ANF) is constructed using the secondorder IIR NF. The approach consists in developing a robust low-complexity algorithm for removing unknown MCWI. The MANF model is a multistage model, with each stage consisting of two ANFs: the adaptive IIR notch filter

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Equalization of Frequency Domain Adaptive Filter (FDAF) Using Signal Prediction Aided Reference Spectrum Model (SPRSM)

Ding,

Mi,

Chen

et al. 2024

IEEE Trans. Instrum. Meas.

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General method to mitigate the continuous wave interference and narrowband interference for GNSS receivers

Cited by 7 publications

References 10 publications

Single and Multiple Continuous-Wave Interference Suppression Using Adaptive IIR Notch Filters Based on Direct-Form Structure in a QPSK Communication System

Single and Multiple Continuous-Wave Interference Suppression Using Adaptive IIR Notch Filters Based on Direct-Form Structure in a QPSK Communication System

Multi-Frequency Interference Detection and Mitigation Using Multiple Adaptive IIR Notch Filter with Lattice Structure

Equalization of Frequency Domain Adaptive Filter (FDAF) Using Signal Prediction Aided Reference Spectrum Model (SPRSM)

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