Jamming mitigation in global positioning system receivers using wavelet packet coefficients thresholding

This paper proposes a new method for jamming suppression in the global positioning system (GPS) receivers. The proposed mitigation technique is based on cascading the adaptive finite impulse response (FIR) filter and the approximate conditional mean (ACM) filter. Adaptive FIR filter puts a notch at the interference frequency, but it causes self-noise in presence of high power jammers. ACM filter is an effective filter for estimating the jamming with known autoregressive process model parameters. However, its performance is degraded in the cases of high power interferences. Cascading these two filters has two advantages: first, collaboration of these two filters can help removing high power jammers. Second, the depth of notch can be limited by a threshold in presence of high power jammers to prevent self-noise effect. In such a case, the ACM filter can help to remove the remaining jamming effects on GPS signal. The performance of proposed method is analyzed in presence of single and multiple continuous wave interferences. Experimental results show the benefits of proposed method on terms of signal to noise power ratio improvement and mean square error compared to previous methods.

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“…X(k), w(k), v(k), A and matrix H are depicted in Eqs. (13), (14), (15), (16) and (17), respectively [25,26]. ð16Þ…”

Section: Acm Filtermentioning

confidence: 99%

“…The WT overcomes STFT and filter bank drawback by controlling the tradeoff between frequency and time. However, it needs to be tuned optimally for each kind of jamming [14].…”

Section: Introductionmentioning

confidence: 99%

A New Method for Continuous Wave Interference Mitigation in Single-Frequency GPS Receivers

Mosavi

Moghaddasi

Rezaei

2016

Wireless Pers Commun

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“…For a denoising purpose, an appropriate threshold should be selected. Among various options, the common threshold is as follows [16]- [17] γ = δ 2 ln (N ln (N )) / ln (2),…”

Section: B Correlation-based Receiver With Wpdmentioning

confidence: 99%

“…However, in this case, direction of arrivals of jamming signals must be estimated first, which leads to high cost and computational complexity. The other simple and promising alternatives are to use independent component analysis (ICA) [14]- [15] and wavelet packet decomposition (WPD) methods [16]- [17]. The advantage of the ICA method lies in the fact that it does not require prior information of jamming signals, i.e.…”

Section: Introductionmentioning

confidence: 99%

Designing Anti-Jamming Receivers for NR-DCSK Systems Utilizing ICA, WPD, and VMD Methods

Nguyen

Jung

et al. 2019

IEEE Trans. Circuits Syst. II

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In this work, we consider an advanced noise reduction differential chaotic shift keying (NR-DCSK) system in which a single antenna source communicates with a single antenna destination under the attack of a single antenna jammer. We devote our efforts to design a novel anti-jamming (AJ) receiver for the considered system. Particularly, we propose a variational mode decomposition-independent component analysis-wavelet packet decomposition-based (VMD-ICA-WPD-based) structure, in which the VMD method is firstly exploited to generate multiple signals from the single received one. Secondly, the ICA method is applied to coarsely separate chaotic and jamming signals. After that, the WPD method is used to finely estimate and mitigate jamming signals that exist on all outputs of the ICA method. Finally, an inverse ICA procedure is carried out, followed by a summation, and the outcome is passed through the conventional correlation-based receiver for recovering the transmitted information. Simulation results show that the proposed receiver provides significant system performance enhancement compared to that given by the conventional correlation-based receiver with WPD, i.e. 8 dB gain at BER = 0.03 and Eb/N0 = 20 dB.

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“…The interference suppression techniques for GNSS receivers include time-domain processing, transform-domain processing, spatial processing, and spatial-time processing [1,2]. The methods based on time-domain and transform-domain processing have been widely studied (e.g., [3,4]). Although they are effective for suppressing narrowband interference signals, their performance degrades when they deal with wideband interferers such as Gaussian interferers or when the interfering signal changes rapidly in time-domain and frequency domain (e.g., swept continuous wave interference).…”

Section: Introductionmentioning

confidence: 99%

Cascaded Multitype Interferences Suppression Method Using Sparse Representation and Array Processing for GNSS Receiver

Guo

2017

International Journal of Antennas and Propagation

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Interference suppression techniques have been intensively studied in nearly two decades due to their importance for maintaining the integrity and functionality of global navigation satellite system (GNSS). However, the interference suppression method applicable for the complex receiving environment in which there are multitype interfering signals has not been considered in most of the researches. To deal with this problem better, a cascaded multitype interferences suppression method using sparse representation and array processing is proposed. In the first stage, according to the sparsity of the narrowband and modulated wideband interference signals, a novel parallel multichannel signal interference suppression method based on matching pursuit (MP) algorithm and a design strategy for the overcomplete dictionary are proposed to mitigate the interferences with sparse features. Then, the minimum power distortionless response (MPDR) beamformer is employed in the second stage to suppress the residuary interferences (such as Gaussian noise interferences). Compared with existing algorithms, the proposed method can not only effectively suppress the interference arriving from the same direction with the desired signal and increase the Degree of Freedom (DoF) of the array antenna, but also introduce no distortion into the navigation signal. The effectiveness of the proposed method is illustrated by theoretical analysis and several simulation results.

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Jamming mitigation in global positioning system receivers using wavelet packet coefficients thresholding

Cited by 36 publications

References 15 publications

A New Method for Continuous Wave Interference Mitigation in Single-Frequency GPS Receivers

A New Method for Continuous Wave Interference Mitigation in Single-Frequency GPS Receivers

Designing Anti-Jamming Receivers for NR-DCSK Systems Utilizing ICA, WPD, and VMD Methods

Cascaded Multitype Interferences Suppression Method Using Sparse Representation and Array Processing for GNSS Receiver

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