Verification method of aircraft ADS-B position by AOA and TDOA

Automatic Dependent Surveillance—Broadcast (ADS-B) is a position broadcast system for air traffic control. Although ADS-B outperforms traditional radars, positional verification—a technique used to check the validity of the position report—is necessary to detect anomaly information. A popular approach is using time difference of arrival (TDOA). However, many receiver sites are necessary to achieve higher detection performance. Therefore, performance enhancement by additional angle of arrival (AOA) measurement is proposed in this study. First, the conventional and proposed methods were mathematically modeled in a unified framework. Then, benefit of the proposed method compared with the conventional method was evaluated in numerical simulation. Finally, measurement-based analysis were conducted to consider practical implementation of the method and demonstrated its feasibility.