Open AccessMETHOD OF DETECTING FALSE INTENTIONALLY GENERATED ADS-B SIGNALS
Author(s) -
Andrey S. Kalintsev,
Evgeniy Rubtsov
Publication year - 2020
Publication title -
t-comm
Language(s) - English
Resource type - Journals
eISSN - 2072-8743
pISSN - 2072-8735
DOI - 10.36724/2072-8735-2020-14-11-4-13
Subject(s) - computer science , secondary surveillance radar , real time computing , antenna (radio) , civil aviation , transponder (aeronautics) , transmitter , encryption , computer security , telecommunications , aviation , engineering , radar , channel (broadcasting) , aerospace engineering
The International Civil Aviation Organization recommends to use advanced surveillance systems: multi-sensor surveillance system and automatic dependent surveillance broadcast. Ground stations for automatic dependent surveillance have a relatively low cost and can partially replace secondary surveillance radars in the future. Currently, the development of automatic dependent surveillance has slowed down, because the system has vulnerabilities: the complete openness of the 1090ES data link, the lack of encryption and protection against false intentionally generated signals. There are a large number of equipment on the market for receiving and processing on-board transponder signals; for specialists it's not difficult to assemble transmitting equipment that generates such signals. This poses a serious threat to information security and flight safety. The article proposes a method that allows, through a comprehensive analysis of the aircraft trajectory and the nature of the level of received signals, identify false signals generated intentionally. The proposed technique is based on identification of abnormal characteristics of false signals. To search and identify anomalous characteristics, the Mahalanobis distance is estimated. To increase the distinguishability of data and to detect intentional interference, it is necessary to modernize the antenna system of the ground station by introducing an additional antenna with a different radiation pattern. The false signal generated by the ground source is detected by a constant value of the antenna directivity ratio. The developed technique was implemented in the MATLAB software and applied to evaluate real data received from the ground-based automatic dependent surveillance station located in the Arkhangelsk air traffic management center. The power levels of the received messages of automatic dependent observation received from L-410 aircraft operating in the area of local air lines were used as reference values.