부산대학교 도서관

Co-frequency interference (CFI) has plagued giant non-geostationary orbit (NGSO) constellation systems. Due to the large number of available communication satellites and interfering satellites within the visual range of a ground station (GS), the potential interference suffered by a GS selecting different communication satellites to establish a communication link is different. In this paper, we propose a communication satellite selection criterion based on maximizing the expected signal-to-noise ratio (MESINR), which determines the selected communication satellites based on the maximum value of the average signal-to-noise ratio (SINR) during the available time of the visible communication satellites. Simulation results show that the MESINR-based method proposed in this paper can improve the communication quality of the interfered NGSO system and reduce the probability of CFI among NGSO systems to a certain extent, compared with the three satellite selection principles, namely, maximum communication duration, minimum communication distance and maximum communication elevation angle.