A Study on the Collision Probability of Satellite-Based ADS-B Messages Based on Homogeneous Poisson Process

Automatic Dependent Surveillance-Broadcast (ADS-B) is an air traffic surveillance system in which aircraft broadcast GPS position, velocity and status on 1090 MHz. Nowadays, as a valid alternative to SSR, ADS-B is the main technology for Air Traffic Management (ATM). With the rapid growth of airspace traffic and disappearance of MH370, satellite-based ADS-B is proposed to realize aerial surveillance globally. The satellite-based ADS-B has a series of new features that Terrestrial based does not have including wider coverage, lower SNR. These new features make ADS-B signal collisions at the receiver more severe. This paper is to analyze the collision probability of satellite-based ADS-B messages based on homogeneous Poisson process. According to the theoretical derivation and simulation analysis, a conclusion can be drawn that the collisions of two and three messages dominate in all cases. It helps in guiding the design of the hardware and software of satellite-based ADS-B receiver to focus on the separation of two and/or three collision messages only, which will dramatically reduce the complexity of the system and the load of satellite.