Abstract

With the widespread application of GNSS systems in various fields, the problem of spoofing detection has drawn much attention from the satellite navigation community. The GNSS spoofing interference generally uses fake or replayed satellite signals to make the targeted receivers receive false GNSS signals and reduce the accuracy of calculated position and time information. In order to ensure and improve the security of GNSS services, in recent years, academia and industry have studied the spoofing detection technology from multiple aspects, and many theoretical results have been obtained. This paper starts the analysis from the acquisition phase of a receiver and analyzes the characteristics of the small-delay spoofing signal. Aiming at solving the problem that it is difficult to detect small-delay (0-2 chips) spoofed signals during the acquisition phase, the CNN (Convolutional Neural Network) based method is used to detect the small-delay spoofed signals effectively. According to the experimental simulation results, when the code phase difference between the spoofing signal and the authentic satellite signal is larger than 0.5 code chip, the CNN-based method achieves high detection accuracy. In addition, the algorithm can quickly detect the data without using any additional equipment. Therefore, low complexity is achieved. This makes the algorithm has a good engineering application prospect.

Highlights

  • With the development of the Global Navigation Satellite System (GNSS), the satellite navigation technology has been widely used in the military and civil fields, including military, aviation, communications, business, and many other fields [1], [2]

  • The sampling frequency of the GNSS intermediate frequency (IF) signal was set to 16.367667 MHz, the IF frequency was set to 4.123968 MHz, and the navigation message data were randomly generated

  • The simulated spoofing signal differed from the authentic signal mainly in the Doppler frequency shift, pseudo-code phase, and power

Read more

Summary

Introduction

With the development of the Global Navigation Satellite System (GNSS), the satellite navigation technology has been widely used in the military and civil fields, including military, aviation, communications, business, and many other fields [1], [2]. The rapid development and popularization of mobile communication, automobile, and other industries have made the GNSS be more deeply integrated into people’s daily lives. The importance of GNSS to the military field is self-evident, and it is an important support for electronic warfare, information warfare, and long-range warfare. It is one of the most basic and important technical means for the precision strike of missiles and other types of weapons.

Results
Discussion
Conclusion
Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call