Test Equipment for TDOA-based ADS-B Position Verification

Abstract

Time difference of arrival (TDOA) measurement is a proficient technique for enhancing the security of automatic dependent surveillance―broadcast (ADS-B). The method assesses the credibility of a reported position by measuring its TDOA across receivers, subsequently validating the coherence between the position and TDOA. For testing a spe-cific implementation of the method in research-and-development process, factory acceptance test, and site acceptance test, dedicated testing equipment is necessary. However, such testing equipment have not been discussed in the open literature. Therefore, this paper presents the testing equipment developed by the authors, which is capable of generating ADS-B signals with an adjustable TDOA.