Low-Complexity Beam Selection Technique for Multi-Beam LEO Satellite Communications

Multi-beam satellite communication systems have been studied to overcome the spectrum scarcity in 6G non-terrestrial networks (NTNs). The multi-beam allows a single satellite to configure multiple spot beams toward multiple ground areas over the same time-frequency radio resources. However, this may also lead to inter-beam interference, hindering spec-tral efficiency (SE) improvements. This paper proposes a low-complexity spot-beam selection technique for low-earth orbit (LEO) satellite communication systems that maximize the SE by activating some of the multiple spot beams based on each spot beam's signal-to-interference ratio (SIR). Simulation results reveal that the proposed algorithm effectively ameliorates the SE of multi-beam LEO satellite networks.