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Sensors 2015, 15(4), 9404-9426; doi:10.3390/s150409404

An Improved Time-Frequency Analysis Method in Interference Detection for GNSS Receivers

1
School of Computer and Information, Hefei University of Technology, Tunxi Road 193, Hefei 230009, China
2
School of Electronic and Information Engineering, Beihang University, XueYuan Road 37, Beijing 100191, China
*
Author to whom correspondence should be addressed.
Academic Editor: Wilmar Hernandez
Received: 22 December 2014 / Revised: 6 March 2015 / Accepted: 14 April 2015 / Published: 21 April 2015
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [1904 KB, uploaded 21 April 2015]   |  

Abstract

In this paper, an improved joint time-frequency (TF) analysis method based on a reassigned smoothed pseudo Wigner–Ville distribution (RSPWVD) has been proposed in interference detection for Global Navigation Satellite System (GNSS) receivers. In the RSPWVD, the two-dimensional low-pass filtering smoothing function is introduced to eliminate the cross-terms present in the quadratic TF distribution, and at the same time, the reassignment method is adopted to improve the TF concentration properties of the auto-terms of the signal components. This proposed interference detection method is evaluated by experiments on GPS L1 signals in the disturbing scenarios compared to the state-of-the-art interference detection approaches. The analysis results show that the proposed interference detection technique effectively overcomes the cross-terms problem and also preserves good TF localization properties, which has been proven to be effective and valid to enhance the interference detection performance of the GNSS receivers, particularly in the jamming environments. View Full-Text
Keywords: interference detection; time-frequency (TF) analysis; cross-terms; Wigner–Ville distribution (WVD); smoothed pseudo Wigner–Ville distribution (SPWVD); reassignment method interference detection; time-frequency (TF) analysis; cross-terms; Wigner–Ville distribution (WVD); smoothed pseudo Wigner–Ville distribution (SPWVD); reassignment method
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Sun, K.; Jin, T.; Yang, D. An Improved Time-Frequency Analysis Method in Interference Detection for GNSS Receivers. Sensors 2015, 15, 9404-9426.

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