A multi-dimensional domain satellite navigation deception jamming detection method based on dual-frequency fusion

Abstract

The invention proposes a multi-dimensional domain satellite navigation deception interference detection method based on dual-frequency fusion, which belongs to the technical field of satellite navigation. Based on the traditional design architecture of satellite navigation receivers, this method normally completes the capture, tracking and positioning of space-visible satellite signals; identification of deception jamming; using the dual-frequency ionospheric error fitting value to detect deception jamming signals; the dual-frequency ionospheric error fitting value and the ionospheric error value of the ionospheric model in the message analyzed by the receiver positioning Then, the spoofing interference signal is detected again by using the fitting error. This method is not limited to a single type of spoofing interference, and is effective for all spoofing signals such as generating spoofing, forwarding spoofing, single-antenna spoofing, multi-antenna spoofing and combinations of various types.

Description

technical field [0001] The invention relates to the technical field of satellite navigation, in particular to a multi-dimensional domain satellite navigation deception interference detection method based on dual-frequency fusion. Background technique [0002] With the development of global satellite navigation systems, satellite navigation receivers have become the mainstream applications for people to find spatial positions, speed measurements, and route navigation, and have a profound impact on people's daily life and national security. Satellite navigation receivers are widely used in positioning, speed measurement, navigation, and timing in various fields such as communication, navigation, radar, civil aviation, and transportation. With the extensive and in-depth application of satellite navigation, the safety and reliability of satellite navigation applications have increasingly become the focus of attention. However, since the satellite navigation signal reaching the ...

AI Technical Summary

Problems solved by technology

In practical engineering applications, the spoofing jamming pattern is complex and changeable, and the jamming type is not single. Traditional spoofing jamming detection methods such as power detection, Doppler detection, and autonomous integrity detection are all effective for a certain spoofing jamming pattern. There are great limitations in the face of complex and diverse spoofing interference; the equipment complexity and platform requirements of the array antenna spoofing interference detection method based on the direction of arrival estimation are too harsh:

[0004] 1. A deceptive interference detection method based on signal power. This method detects the existence of deceptive signals through the power intensity and changes of deceptive signals. However, due to the influence of factors such as antenna type, antenna pattern, antenna attitude, and multipath effects, there are large The false alarm detection probability of ;

[0005] 2. The detection method of spoofing interference based on signal Doppler. This method uses the dynamic difference between the satellite navigation receiver and the carrier of spoofing interference to detect spoofing interference. When the dynamics of the satellite receiver is small, or the transmission method is multi-antenna The deception of this method has great application limitations;

[0006] 3. The detection method of spoofing interference based on the autonomous integrity of the receiver. This method uses the estimation of the residual error in the positioning solution to realize the identification of spoofing interference. This method is only effective when there is spoofing on 1 or 2 satellites. When there are multiple satellites This method is powerless when the generative spoofing of the satellite is used;

[0007] 4. The spoofing interference detection method based on the direction-of-arrival estimation of array antennas. This method uses the principle of spatial beamforming and direction-of-arrival estimation of array antennas to realize real-time detection of spoofing signals. However, due to the need for complex array antenna equipment, the equipment platform requirements are very demanding

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