Abstract
This paper develops novel Global Navigation Satellite System (GNSS) interference detection methods based on the Hough transform. These methods are realized by incorporating the Hough transform into three Time-Frequency distributions: Wigner–Ville distribution, pseudo -Wigner–Ville distribution and smoothed pseudo-Wigner–Ville distribution. This process results in the corresponding Wigner–Hough transform, pseudo-Wigner–Hough transform and smoothed pseudo-Wigner–Hough transform, which are used in GNSS interference detection to search for local Hough-transformed energy peak in a small limited area within the parameter space. The developed GNSS interference detection methods incorporate a novel concept of zero Hough-transformed energy distribution percentage to analyze the properties of energy concentration and cross-term suppression. The methods are tested with real GPS L1-C/A data collected in the presence of sweep interference. The test results show that the developed methods can deal with the cross-term problem with improved interference detection performance. In particular, the GNSS interference detection performance obtained with the smoothed pseudo-Wigner–Hough transform method is at least double that of the Wigner–Hough transform-based approach; the smoothed pseudo-Wigner–Hough transform-based GNSS interference detection method is improved at least 20% over the pseudo-Wigner–Hough transform-based technique in terms of the zero Hough-transformed energy percentage criteria. Therefore, the proposed smoothed pseudo-Wigner–Hough transform-based method is recommended in the interference detection for GNSS receivers, particularly in challenging electromagnetic environments.
Highlights
Complex electromagnetic environments affect satellite navigation applications
From the Global Navigation Satellite Systems (GNSS) interference detection results obtained with the Hough transformbased techniques, the proposed smoothed pseudo-Wigner–Hough transform can be successfully used to detect the GNSS sweep interference since it deals with the cross-term problem effectively and shows much-improved energy aggregation property over the pseudo-Wigner–Hough transform and Wigner–Hough transform techniques
This paper has proposed a novel smoothed pseudo-Wigner–Hough transform-based
Summary
Complex electromagnetic environments affect satellite navigation applications. Global Navigation Satellite Systems (GNSS) are designed with a level of immunity from signal interference through the adoption of the direct-sequence spread spectrum (DSSS) scheme in signal design, the power of the received GNSS signal at the receiver antenna is very low [1]. One of the most serious threats to GNSS receivers is radio frequency interference (RFI). This is because of the ease and simplicity of generating intentionally interfering signals using low-cost jamming devices. These jammers can radiate powerful and disruptive disturbing signals into the GNSS frequencies part of the L-band.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.