Deception jamming detection method based on position correlations between multiple receivers

Abstract

The invention discloses a deception jamming detection method based on position correlations between multiple receivers. The method includes the following steps that: the antennas of the receivers aredistributed in a scattered manner with the distribution spacing ranging from 2 to 4sigma, wherein sigma is receiver positioning error; position information is obtained by means of receiver positioningsolution, and a receiver position vector model is constructed; a position covariance matrix is solved through the position vector matrix, and correlations between various dimensions are analyzed; andthe eigenvalue of the position covariance matrix is obtained, and a principal component analysis method is used to detect whether the position information is redundant, and a deception detector is used to detect whether the receivers are subject to deception interference. With the method of the invention adopted, the deception interference detection capacity of the receivers can be improved; thedeception interference is detected through the position correlations between the receivers, and different positions are linearly unrelated theoretically; and whether the receivers are deceived can beaccurately detected through the position correlations between the receivers.

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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