A spoofing jamming detection method based on location correlation among multiple receivers

Abstract

The invention discloses a deceptive interference detection method based on position correlation among multiple receivers. The method includes the following steps: the receiver antennas are distributed in a scattered manner, and the distribution interval is 2 to 4σ, where σ is the receiver positioning error; the position information is obtained through the receiver positioning solution, and the receiver position vector model is constructed; the position vector matrix is ​​used to solve The position covariance matrix is ​​used to analyze the correlation between each dimension; the eigenvalues ​​of the position covariance matrix are obtained, and the principal component analysis method is used to detect whether the position information is redundant, and the deception detector is used to detect whether there is deception interference in the receiver. The present invention improves the receiver's ability to detect spoofing interference, uses position correlation between receivers to detect spoofing interference, theoretically has no linear relationship between different positions, and can accurately detect whether a receiver is deceived by detecting the correlation between receiver positions .

Description

technical field [0001] The invention relates to the field of satellite navigation technology and satellite signal spoofing interference technology, in particular to a detection method for spoofing interference based on position correlation among multiple receivers. Background technique [0002] In recent decades, satellite navigation technology has profoundly changed people's lives and is widely used in vehicle navigation, aircraft navigation, weapon guidance and precise timing. The satellite navigation system can provide global users with all-weather real-time positioning, navigation and timing (PNT) information, so it is very important to improve the reliability of the satellite system. [0003] The basic principle of the satellite navigation system is that the receiver receives the signals transmitted by the navigation satellites in space to calculate the distance between the receiver and the satellite. When the visible satellites are greater than or equal to 4, the posit...

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Problems solved by technology

[0003] The basic principle of the satellite navigation system is that the receiver receives the signals transmitted by the navigation satellites in space to calculate the distance between the receiver and the satellite. When the visible satellites are greater than or equal to 4, the position and speed of the receiver itself can be calculated. and time information, but the energy of the signal is very weak when it is transmitted to the earth, and it is easy to be interfered; at the same time, because the signal structure and code composition of civil signals are open, it is easy to be interfered by deception. Once the receiver is deceiving and interfered, it will cause Serious consequences, such as drones can be tricked and captured; ships can be tricked and change course, etc.

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