Method for realizing distributed ADS-B passive positioning anti-spoofing function on basis of opportunity reference sources

Abstract

The invention relates to a method for realizing a distributed ADS-B passive positioning anti-spoofing function on basis of opportunity reference sources. The method comprises the following steps of: (1) carrying out track processing by an ADS-B system and eliminating interference information and screening wrong messages; (2) carrying out relative position goodness fit verification by the ADS-B system; (3) selecting an opportunity reference source suitable for multi-site synchronization and high in local arrival time TOA measurement accuracy from a trusted group; (4) calculating a local arrivaltime TOA synchronization correction value of each station by using position information in messages of the opportunity reference source and position information of each station; (5) carrying out passive positioning on ADS-B target sources through an arrival time difference; and (6) detecting and reporting spoofing ADS-B source. By adoption of the method, the functions of spoofing ADS-B message detection and spoofing source positioning can be realized at the same time through receiving ADS-B signals by a plurality of ADS-B receivers; and the method has the characteristics of being good in detection performance and low in system and realizing spoofing source positioning.

Description

technical field [0001] The invention relates to the field of information security, in particular to the cross technical fields of aircraft security monitoring and information security, and specifically refers to a method for realizing distributed ADS-B passive positioning and anti-spoofing functions based on opportunistic reference sources. Background technique [0002] Automatic Dependent Surveillance-Broadcast (ADS-B) is to use the airborne navigation sensor system to obtain information such as the precise position and speed of the aircraft, and use the air-ground and air-air data links to automatically broadcast to the outside to complete the aircraft status monitoring and information transmission. new traffic surveillance technology. The ADS-B system adopts an open data protocol, which has the characteristics of high monitoring accuracy, fast data update rate, strong information integrity, low terminal cost, and easy maintenance. widely used. However, the system also h...

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Problems solved by technology

However, the system also has great security risks, mainly in two aspects: on the one hand, the ADS-B system uses an open data protocol to transmit on an unencrypted channel, and is very vulnerable to malicious deception interference from false ADS-B base stations ; On the other hand, the ADS-B system is highly dependent on the GNSS system for aircraft position awareness, and is relatively vulnerable to regional GNSS interference and spoofing, which will cause false aircraft position broadcasts

[0003] In order to solve the problem of anti-spoofing in the ADS-B system, the methods currently used in the industry mainly include the radar data verification method, the multi-base station time difference positioning verification method and the multi-array antenna verification method, but there are bottlenecks of complex systems and high costs; With the improvement of GNSS timing accuracy, there are also low-cost multi-base station time difference positioning equipment based on GNSS timing, but this type of equipment itself also relies heavily on the GNSS system and cannot be applied to the scene of local GNSS interference

In addition, in recent years, researchers at home and abroad have also proposed some other methods, including the Kalman tracking filter based on Kalman tracking filter proposed in paper 1 (Mueller K, Krozel J. Aircraft ADS-B intent verification based on a Kalman tracking filter. Aiaa Journal, 2013). Track verification method, Chinese patent (ADS-B autonomous anti-spoofing method based on GNSS integrity information, patent number CN201610231106.1) based on GNSS integrity information verification method, and paper 2 (Chen Lei, Wu Renbiao, Lu Dan. ADS-B spoofed interference detection method using Doppler effect. Signal processing, 2018 (6)) proposed a single-station Doppler calibration method; these methods have the characteristics of low cost and complexity, However, they are all based on the verification of data or signal waveform domain. They do not have the characteristics that position and orientation information are difficult to be deceived, and there is still the possibility of being deceived by "realistic" targets, and it is also impossible to locate the interference source, which is not convenient for countermeasures. control and enforcement measures

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