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Keywords = swept jamming

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15 pages, 6228 KB  
Article
GPS Swept Anti-Jamming Technique Based on Fast Orthogonal Search (FOS)
by Mohamed Tamazin, Michael J. Korenberg, Haidy Elghamrawy and Aboelmagd Noureldin
Sensors 2021, 21(11), 3706; https://doi.org/10.3390/s21113706 - 26 May 2021
Cited by 9 | Viewed by 5190
Abstract
Recently, there has been growing demand for GPS-based reliable positioning, with the broadening of a range of new applications that mainly rely on GPS. GPS receivers have, recently, been attractive targets for jamming. GPS signals are received below the noise floor. Thus, they [...] Read more.
Recently, there has been growing demand for GPS-based reliable positioning, with the broadening of a range of new applications that mainly rely on GPS. GPS receivers have, recently, been attractive targets for jamming. GPS signals are received below the noise floor. Thus, they are vulnerable to interference and jamming. A jamming signal can potentially decrease the SNR, which results in disruption of GPS-based services. This paper aims to propose a reliable and accurate, swept anti-jamming technique based on high-resolution spectral analysis, utilizing the FOS method to provide an accurate spectral estimation of the GPS swept jamming signal. resulting in suppressing the jamming signal efficiently at the signal processing stages in the GPS receiver. Experiments in this research are conducted using the SpirentTM GSS6700 simulation system to create a fully controlled environment to test and validate the developed method’s performance. The results demonstrated the proposed method’s capabilities to detect, estimate, and adequately suppress the GPS swept jamming signals. After the proposed anti-jamming module was employed, the software receiver was able to provide a continuous positioning solution during the presence of jamming within a 10 m positioning accuracy. Full article
(This article belongs to the Special Issue Advanced Interference Mitigation Techniques for GNSS-Based Navigation)
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14 pages, 5632 KB  
Article
Experimental Evaluation of the Impact of Different Types of Jamming Signals on Commercial GNSS Receivers
by Haidy Elghamrawy, Malek Karaim, Mohamed Tamazin and Aboelmaged Noureldin
Appl. Sci. 2020, 10(12), 4240; https://doi.org/10.3390/app10124240 - 20 Jun 2020
Cited by 27 | Viewed by 7122
Abstract
The received global navigation satellite system (GNSS) signal has a very low power due to traveling a very long distance and to the nature of the signal’s propagation medium. Thus, GNSS signals are easily susceptible to signal interference. Signal interference can cause severe [...] Read more.
The received global navigation satellite system (GNSS) signal has a very low power due to traveling a very long distance and to the nature of the signal’s propagation medium. Thus, GNSS signals are easily susceptible to signal interference. Signal interference can cause severe degradation or interruption in GNSS position, navigation, and timing (PNT) services which could be very critical, especially in safety-critical applications. The objective of this paper is to evaluate the impact of the presence of jamming signals on a high-end GNSS receiver and investigate the benefits of using a multi-constellation system under such circumstances. Several jamming signals are considered in this research, including narrowband and wideband signals that are located on GPS L1 or GLONASS L1 frequency bands. Quasi-real dynamic trajectories are generated using the Spirent™ GSS6700 GNSS signal simulator combined with an interference signal generator through a Spirent™ GSS8366 unit. The performance evaluation was carried out using several evaluation metrics, including signal power degradation, navigation solution availability, dilution of precision (DOP), and positioning accuracy. The multi-constellation system presented better performance over the global positioning system (GPS)-only constellation in most cases. Moreover, jamming the GPS band caused more critical effects than jamming the GLONASS band. Full article
(This article belongs to the Section Electrical, Electronics and Communications Engineering)
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