2019/09/11 by Christophe Braun, Andra M. Voicu, Braun, Christophe +5 · 2 citations
Engineering · #FOS: Computer and information sciences #FOS: Electrical engineering #Networking and Internet Architecture (cs.NI) #Satellite Communication Systems #Signal Processing (eess.SP) #Space Satellite Systems and Control #electronic engineering #information engineering
paper · pdf · doi:10.48550/arxiv.1909.05130
openalex publication_date 2019/09/11 · openalex created_date 2022/07/28 · openalex updated_date 2026/07/28
Many satellite operators are planning to deploy NGSO systems for broadband\ncommunication services in the Ku-, Ka-, and V-band, where some of them have\nalready launched. Consequently, new challenges are expected for inter-system\nsatellite coexistence due to the increased interference level and the\ncomplexity of the interactions resulting from the heterogeneity of the\nconstellations. This is especially relevant for the Ku-band, where the NGSO\nsystems are most diverse and existing GSO systems, which often support critical\nservices, must be protected from interference. It is thus imperative to\nevaluate the impact of mutual inter-system interference, the efficiency of the\nbasic interference mitigation techniques, and whether regulatory intervention\nis needed for the new systems. We conduct an extensive study of inter-satellite\ncoexistence in the Ku-band, where we consider all recently proposed NGSO and\nsome selected GSO systems. Our throughput degradation results suggest that\nexisting spectrum regulation may be insufficient to ensure GSO protection from\nNGSO interference, especially due to the high transmit power of the LEO Kepler\nsatellites. This also results in strong interference towards other NGSO\nsystems, where traditional interference mitigation techniques like look-aside\nmay perform poorly. Specifically, look-aside can be beneficial for large\nconstellations, but detrimental for small constellations. Furthermore, we\nconfirm that band-splitting among satellite operators significantly degrades\nthroughput, also for the Ku-band. Our results overall show that the complexity\nof the inter-satellite interactions for new NGSO systems is too high to be\nmanaged via simple interference mitigation techniques. This means that more\nsophisticated engineering solutions, and potentially even more strict\nregulatory requirements, will be needed to ensure coexistence in emerging,\ndense NGSO deployments.\n