Research And Implementation Of ADS-B Anti-Fraud Technology Based On TDOA And TSOA

Because of ADS-B data with the secondary radar S model is similar to the data content,with a high update rate,the completeness of the information rich,precision higher characteristic,system maintenance and convenient,cost is low,air transportation and air traffic control in the countries all over the world has been widely applied in the ATC.use of its high precision monitoring data,fast update rate,rich information and strong integrity and the characteristics of low cost,easy to maintain,air transport system in the countries all over the world,especially the air traffic control has been widely applied in the ATC.The effectiveness and reliability of ADS-B system data is increasingly important with the extensive installation and use of ADS-B(Automaic Dpendent Surveillance-Broadcast)of the new civil aviation auxiliary surveillance system.In this paper,based on TDOA and TSOA ADS-B anti cheat technology as the research subject,research is mainly focused on the composition of ADS-B system,ADS-B data characteristics and reliability analysis,and TDOA and TSOA algorithm and simulation,etc.Timely,complete and accurate mastery of target position and intention and target state is the core of ATM concept in the future.ADS-B intergrated air wireless data link communications technology,GNSS satellite navigation technology,the airborne terminal equipment,ground terminal equipment and so on.Similar with secondary radar,provides a fairly air traffic monitoring means,to reduce the cost of equipment installation,at the same time can effectively help controllers and pilots to control of aircraft operation situation,can effectively improve the level of air traffic safety,airspace,and the capacity of the route and the running efficiency of each department at the airport.Installed the ADS-B in ground equipment in the user can easily receive from other aircraft and ground infrastructure(position of the base station,vehicles,etc.)and other information(such as TIS-B/FIS-B,etc.),shows the cooperative autonomous monitoring technology widespread application prospect in the future.The working frequency,working mode and signal format/protocol of ADS-B system with bi-directional architecture are all open to the industry.Due to its characteristics of openness,the lack of the key data encryption and authentication,the communication between air and ground is clear,and does not need to transfer the source authentication,vulnerable to interference and malicious deception.Therefore,it is urgent and important to study the anti-cheating technology of ADS-B.Of ADS-B hardware system and the analysis of the data security,we can make use of ADS-B out radio signals to ADS-B ground equipment in the difference of time,research explored a localization algorithm is better than TODA algorithm,namely TDOA and coordinate TSOA three-dimensional positioning of target localization algorithm for calculating..TDOA is the time difference localization algorithm,TSOA is the time sum localization algorithm.Integrated TDOA and TSOA synergistic technology to achieve the goal of three-dimensional positioning of the target,thereby determining the authenticity and effectiveness of the target.Through MATLAB simulation model,to establish a set of TDOA and TSOA algorithm under the condition of a variety of embattling mode,a variety of error analysis and simulation,simulation of different site layout of positioning error of the current airspace.The simulation results show that the proposed algorithm is feasible.