Beam Management for Interference Mitigation in GEO-LEO Satellite Networks With Precoding

Spectrum scarcity can be effectively mitigated through spectrum sharing between LEO and GEO satellites. However, severe interbeam interference may be caused by the dense distribution and wide coverage of multilayer satellite systems. Furthermore, the uneven distribution of traffic demand generated by users may lead to load imbalance among satellites, by which service fairness may be degraded. In this paper, beam management and precoding design are investigated in GEO-LEO coexistence networks to mitigate interbeam interference and improve service fairness in multi-layer satellite systems. To solve the load imbalance problem, a serving satellite allocation algorithm based on game matching theory is proposed. Moreover, a heuristic-based joint beam management and precoding algorithm is proposed to mitigate interference and enhance service fairness. Simulation results show the effectiveness of the proposed algorithms.