Spur Mitigation in High-Sensitivity GNSS Receivers

Subburaj, Karthik; Bhatara, S.; Tangudu, Jawaharlal; Samuel, J. R.; Ganesan, Raghu; Ramasubramanian, Karthik

doi:10.1109/tcsii.2013.2291100

Cited by 5 publications

(5 citation statements)

References 11 publications

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“…In most GPS anti-jamming applications, only the first effect is considered and hence only a pre-correlation mitigation block is designed to overcome jamming attacks. Adaptive time filtering [7,8], frequency filtering [9][10][11][12], time-frequency (t-f) filtering [13][14][15][16][17][18][19], and spatial filtering [20,21] methods are the most common pre-correlation mitigation techniques in GPS receivers. The first three groups are suitable for narrowband jamming mitigation and the fourth group is appropriate for both narrowband and wideband jamming mitigation [15].…”

Section: Introductionmentioning

confidence: 99%

“…Adaptive filtering methods are simple and thus they are suitable for real-time applications. However, they need primary information about jamming signal [7][8][9][10][11][12]. In [17], a waveletpackets transform (WPT)-based anti-jamming system is proposed, which can detect and mitigate narrowband jamming.…”

Section: Introductionmentioning

confidence: 99%

“…The pre-correlation block is employed to ensure that at least four satellites can be acquired in jamming environments. As the most adaptive filtering methods need primary information about jamming signal [7][8][9][10] and spatial filtering methods impose extra hardware to the system (and are also computationally complex) [20,21], t-f-based mitigation methods are more suitable for employing in the pre-correlation block. Hence, the pre-correlation block employs short-time Fourier transform (STFT) to detect and mitigate narrowband jamming.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hybrid anti‐jamming approach for kinematic global positioning system receivers

Rezaei

Mosavi

2018

IET signal process.

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In this study, a new hybrid anti-jamming system is proposed for kinematic global positioning system receivers. The proposed system employs a short-time Fourier transform (STFT)-based pre-correlation block to guarantee that the receiver can acquire at least four satellites in jamming environments. It also employs a discrete wavelet transform-based denoising block in the navigation unit of the receiver to increase positioning accuracy, which was degraded due to the jamming and also due to the movement of the receiver. Simulation results demonstrate that the proposed system has a better anti-jamming performance compared with previous methods. They show that the average positioning accuracies of the proposed system are 47, 45, and 43% better than the standard STFT-based mitigation method, wavelet-packets transform (WPT)-assisted filter, and WPT-based hybrid system, respectively.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hybrid anti‐jamming approach for kinematic global positioning system receivers

Rezaei

Mosavi

2018

IET signal process.

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“…The carrier to noise ratio (CNR) is as much as 20dB lower than that in open area environments. This motivates the research in high sensitivity receivers [3]. In such weak signal environments, extending the integration time is usually an effective method to achieve a high sensitivity.…”

Section: Introductionmentioning

confidence: 99%

A Novel Method To Extend Coherent Integration for Weak GPS Signal Acquisition

Zhu

Fan

2015

IEEE Commun. Lett.

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In order to enhance the sensitivity of Global Positioning System (GPS) receivers, increasing the coherent integration time in acquisition process is necessary. This letter analyses the limitation to coherent integration in acquisition algorithms due to the bit sign transition of navigation data and proposes a novel time parallel acquisition algorithm with transition detection (denoted as TPATD) to overcome the bit sign transition limitation. Fast Fourier transform (FFT) operation is applied to the proposed TPATD algorithm to search the code delay in parallel. Meanwhile, the algorithm extends the coherent integration time to one entire navigation data bit duration. Simulation results demonstrate the effectiveness of the proposed algorithm. The receiver operating characteristic (ROC) curves show that TPATD algorithm outperforms the existing acquisition techniques.

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“…With the development and application of global navigation satellite systems (GNSS) [1], GNSS signal receiving methods have become highly valued. Because the acquisition technology is the core of receiving; therefore, it also becomes a focus problem.…”

Section: Introductionmentioning

confidence: 99%

A New Acquisition Algorithm with Elimination Side Peak for All BOC Signals

Liu

Feng

2015

Mathematical Problems in Engineering

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A new inhibition side peak acquisition (ISPA) algorithm is proposed for binary offset carrier (BOC) modulated signals, which will be utilized in global navigation satellite systems (GNSS). We eliminate all side peaks of the BOC correlation function (CF) by structuring special sequences composed of PRN code and cycle rectangular sequences. The new algorithm can be applied to both generic sine- and cosine-phased BOC signals, as well as to all modulation orders. Theoretical and simulation results demonstrate that the new algorithm can completely eliminate the ambiguity threat in the acquisition process, and it can adapt to lower SNR. In addition, this algorithm is better than the traditional algorithms in acquisition performance and inhibition side peak ability.

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Spur Mitigation in High-Sensitivity GNSS Receivers

Cited by 5 publications

References 11 publications

Hybrid anti‐jamming approach for kinematic global positioning system receivers

Hybrid anti‐jamming approach for kinematic global positioning system receivers

A Novel Method To Extend Coherent Integration for Weak GPS Signal Acquisition

A New Acquisition Algorithm with Elimination Side Peak for All BOC Signals

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