Anti-spoofing-attack method and system applied to satellite navigation system
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A satellite navigation system, anti-spoofing technology, applied in the field of satellite navigation, can solve the problem of unable to identify the real signal and so on
Active Publication Date: 2014-11-19
TSINGHUA UNIV
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Abstract
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is that the existing anti-spoofing attack method can only judge whether there is a spoofed signal in the received signal, and cannot identify which is a spoofed signal and which is a real signal
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Embodiment 1
[0053] This embodiment discloses a method for anti-spoofing attacks applied to satellite navigation systems, such as figure 1 As shown, the method includes:
[0054] S1. Capture and process satellite signals, and obtain code Doppler information and carrier Doppler information of the satellite signals;
[0055] S2. Perform consistency detection on the code Doppler information and carrier Doppler information to obtain a consistency comparison result;
[0056] S3. According to the consistency comparison result, judge whether the satellite signal is a fraudulent signal, if so, send an alarm message, if not, send the current code phase and carrier frequency information into the preset tracking loop.
[0057] Said step S1 comprises:
[0058] S11. Capture and process the satellite signal, compare the processed correlation value with the preset capture threshold, and record all the code phase parameters and carrier Doppler parameters corresponding to the correlation values greater...
Embodiment 2
[0104] This embodiment discloses a system for anti-spoofing attacks applied to satellite navigation systems, such as Figure 5 As shown, the system may include:
[0105] An information acquisition module, configured to capture and process satellite signals, and acquire code Doppler information and carrier Doppler information of the satellite signals;
[0106] A consistency detection module, configured to perform consistency detection on the code Doppler information and carrier Doppler information to obtain a consistency comparison result;
[0107] Judging module, used to judge whether the satellite signal is a fraudulent signal according to the consistency comparison result, if so, send an alarm message, if not, send the current code phase and carrier frequency information into the preset tracking loop road.
[0108] In a specific application, the information acquisition module may include Figure 5 The following units not shown in:
[0109] The signal processing unit is u...
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Abstract
The invention discloses an anti-spoofing-attack method and system applied to a satellite navigation system. The method comprises the following steps: S1) capturing and processing satellite signals, and obtaining code Doppler information and carrier wave Doppler information of the satellite signals; S2) carrying out consistency detection on the code Doppler information and the carrier wave Doppler information to obtain a consistency comparison result; and S3) judging whether the satellite signals are spoofing signals, sending alarm information if the satellite signals are spoofing signals, and sending current code phase position and carrier wave frequency information to a preset tracking loop if the satellite signals are not spoofing signals. The method and system in the invention not only can judge whether the spoofing signals exist in the received signals, but also can judge which signals are the spoofing signals and which signals are real signals, that is, the second layer can be reached; and the method and system have spoofing signal suppression function and also have strong anti-spoofing capability.
Description
technical field [0001] The invention relates to the technical field of satellite navigation, in particular to an anti-spoofing attack method applied to a satellite navigation system. Background technique [0002] Satellite navigation systems, including GPS, GLONASS, Galileo, Beidou, etc., have been widely used in transportation, communication, electric power, aviation, aerospace and other fields because they can provide accurate time and location information. However, due to factors such as the weak power of navigation signals broadcast by satellites, the complexity of wireless channels, and the disclosure of signal structures, satellite navigation systems are extremely vulnerable to interference and spoofing attacks. Spoofing attacks can cause the target receiving device to output wrong location and time information without being noticed, so spoofing attacks pose a huge threat to the safe use of satellite navigation systems. [0003] The methods of anti-spoofing attacks ca...
Claims
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