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A GNSS anti-spoofing method based on spatial correlation recognition

A spatial correlation and anti-spoofing technology, which is applied in the field of satellite navigation and satellite navigation receiver terminal anti-spoofing interference, can solve the problems that cannot be realized with a single antenna, and cannot be detected by generated spoofing interference, so as to improve the anti-spoofing ability and effectively Conducive to miniaturization and low implementation complexity

Active Publication Date: 2020-09-01
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

Scholars at home and abroad have proposed several anti-spoofing methods to solve the impact of deceptive interference on the navigation system, such as signal arrival detection method, dual-antenna carrier phase difference detection method, etc. The signal arrival detection method can only detect forwarding deception interference. Unable to detect generative spoofing interference; the dual-antenna carrier phase difference detection method requires the satellite navigation terminal to have two receiving antennas, which cannot be implemented in a single-antenna receiving terminal

Method used

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  • A GNSS anti-spoofing method based on spatial correlation recognition
  • A GNSS anti-spoofing method based on spatial correlation recognition
  • A GNSS anti-spoofing method based on spatial correlation recognition

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Embodiment Construction

[0029] The method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] figure 1 It is a flow chart of the signal spatial correlation anti-spoofing algorithm of the present invention. A signal spatial correlation anti-spoofing algorithm uses the characteristic that the spoofed signals are transmitted by the same antenna, so the incident angles of the spoofed signals are the same, but the incident angles of the real satellite signals are different from each other, so as to realize the distinction between the spoofed signals and the real signals. Specifically include the following steps:

[0031] (1) The satellite navigation receiver captures the navigation signal, searches the entire code-frequency two-dimensional domain, and determines that there are several correlation peaks in the current navigation signal;

[0032] (2) If there is only one correlation peak in the navigation signal signal, then there is no decept...

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Abstract

The invention discloses a GNSS anti-spoofing method based on spatial correlation identification, improves the anti-spoofing performance of a satellite navigation receiver, and solves the positioning problem of a single-antenna navigation receiving terminal under the condition of spoofing. In this method, the deceptive jamming signal is transmitted by the same antenna, so it has the same signal incident angle, and the Doppler parameters caused by the movement of the receiving antenna are used to analyze the spatial correlation, so as to realize the deceptive jamming detection of the single-antenna satellite navigation terminal. The method is a simple structure, small amount of calculation, practical satellite navigation anti-spoofing method; it is suitable for real-time moving satellite navigation and positioning terminals such as vehicles and missiles.

Description

technical field [0001] The invention relates to the field of satellite navigation, especially the field of anti-spoofing interference of satellite navigation receiver terminals. The method of spatial correlation identification is used to design and apply the detection of deceptive interference in single-antenna satellite navigation receiving terminals, so as to realize the anti-spoofing interference in the satellite navigation receiving system. Deceptive jamming detection and suppression. Background technique [0002] Faced with the increasingly intelligent and widespread satellite navigation deceptive jamming technology, how to realize the stable and continuous operation of satellite navigation receiving terminals under the influence of deceptive jamming must solve the problem of the impact of deceptive jamming on satellite navigation receiving terminals. Scholars at home and abroad have proposed several anti-spoofing methods to solve the impact of deceptive interference on...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S19/01G01S19/21
CPCG01S19/015G01S19/21
Inventor 蔡霖培邓志鑫李玉玲崔淼于雪岗
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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