2012/11/26 by Dimitris Christopoulos, Symeon Chatzinotas, Christopoulos, Dimitrios +3
Computer Science · Engineering · #Advanced Wireless Network Optimization #FOS: Computer and information sciences #Information Theory (cs.IT) #Satellite Communication Systems #Wireless Communication Networks Research
paper · pdf · doi:10.48550/arxiv.1211.5888
openalex publication_date 2012/11/26 · openalex created_date 2025/10/24 · openalex updated_date 2026/07/28
The constantly increasing demand for interactive broadband satellite\ncommunications is driving current research to explore novel system\narchitectures that reuse frequency in a more aggressive manner. To this end,\nthe topic of dual satellite systems, in which satellites share spatial (i.e.\nsame coverage area) and spectral (i.e. full frequency reuse) degrees of freedom\nis introduced. In each multibeam satellite, multiuser interferences are\nmitigated by employing zero forcing precoding with realistic per antenna power\nconstraints. However, the two sets of users that the transmitters are\nseparately serving, interfere. The present contribution, proposes the partial\ncooperation, namely coordination between the two coexisting transmitters in\norder to reduce interferences and enhance the performance of the whole system,\nwhile maintaining moderate system complexity. In this direction, a heuristic,\niterative, low complexity algorithm that allocates users in the two interfering\nsets is proposed. This novel algorithm, improves the performance of each\nsatellite and of the overall system, simultaneously. The first is achieved by\nmaximizing the orthogonality between users allocated in the same set, hence\noptimizing the zero forcing performance, whilst the second by minimizing the\nlevel of interferences between the two sets. Simulation results show that the\nproposed method, compared to conventional techniques, significantly increases\nspectral efficiency.\n