INS assistance-based satellite navigation spoofing-type interference resisting method

Abstract

An INS assistance-based satellite navigation spoofing-type interference resisting method is disclosed. According to the invention, by employing position and speed information provided by INS, spoofing-type interferences are eliminated in two steps. Firstly, invisible satellites are eliminated based on satellite elevation angles; and then, by using satellite ephemeris information and the position and speed information provided by the INS, the pseudo range and pseudo range change rate curve of a real visible satellite and a corresponding receiver are calculated and compared with the satellite resolving pseudo range and pseudo range rate received in a channel, thereby effectively eliminating satellite signals which mismatch conditions. The method of the invention overcomes the defect that conventional satellite navigation spoofing-type interference resisting needs the foreknowledge of signal types and adopts different interference resisting methods for spoofing-type interference signals of different types; and the method of the invention expands the algorithmic applicability and reduces the algorithmic complexity, thereby being more applicable to complex spoofing-type interference environments.

Description

technical field [0001] The invention relates to an INS-assisted satellite navigation anti-spoofing interference method, which mainly aims at the problem that the satellite navigation receiver cannot be positioned normally or is positioned incorrectly when it works in a complex deceptive interference environment, and solves the anti-spoofing interference method of the satellite navigation receiver problems and difficulties, and improve the anti-jamming performance and application range of satellite navigation receivers. Background technique [0002] The jamming of the satellite navigation system mainly includes suppression jamming and deceptive jamming. Deceptive jamming is aimed at the working characteristics of the satellite navigation receiver and its weak links, giving false navigation information or increasing the signal propagation delay, and jamming the satellite navigation system in a more concealed way. There are multiple variations of deceptive jamming, and current...

AI Technical Summary

Problems solved by technology

If more than 1 pseudolite is generated, it is difficult to eliminate it by this method

[0006] In practical applications, the deceptive interference environment is complex, the types of interference are not single, and it is difficult to know the characteristics of the interference signal in advance, so the traditional single method is difficult to completely eliminate the deceptive interference signal

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