Multi-dimensional domain satellite navigation deception jamming detection method based on beam null pointing

Abstract

The invention discloses a multi-dimensional domain satellite navigation deception jamming detection method based on beam null pointing, and belongs to the technical field of satellite navigation. The method comprises the following steps: determining a to-be-detected satellite number by judging a received satellite number; the array channel is used for independently capturing, tracking and carrying out phase discrimination on the satellite number to be detected, and interferometer direction finding of the satellite number to be detected is completed through measurement; acquiring spatial position information of a to-be-detected satellite number relative to the positioning equipment; inputting the spatial position information to a space-frequency anti-interference processing module for weight calculation, forming null in a space domain through the space-frequency anti-interference processing module, forming space domain beam null suppression on a satellite number to be detected, restarting a positioning equipment capturing process and verifying the influence on the number of captured satellites after the space domain beam null is formed, and realizing the identification and alarm output of deception signals. The method is wide in application range, and is effective for generative deception, forwarding deception, single-antenna deception, multi-antenna deception and various types of combined deception signals.

Description

technical field [0001] The invention relates to the technical field of satellite navigation, in particular to a multi-dimensional satellite navigation deception interference detection method based on beam nulling. Background technique [0002] With the development of the global satellite navigation system, satellite navigation and positioning equipment has become the mainstream application for people to find spatial position, speed measurement, and route navigation, and has a profound impact on people's daily life and national security. Satellite navigation and positioning equipment is widely used in positioning, speed measurement, navigation, and timing in various fields such as military, communication, navigation, radar, civil aviation, and transportation. With the deepening of satellite navigation applications, especially the high demand for the availability, continuity and integrity of satellite navigation in military applications, anti-jamming applications based on arra...

AI Technical Summary

Problems solved by technology

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

[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 generative spoofing of satellites

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