Dual Polarization User Mapping in 2D Multibeam GEO Satellite Considering Unintentional Interferences

ABSTRACT

In this paper, the optimal user allocation is considered in a multibeam GEO satellite to match non‐uniform traffic demand while considering unintentional interference, including adjacent channel, co‐channel, and cross‐polarization interference. Moreover, user mapping to non‐dominant beams is employed in this optimal allocation scheme, which can improve the unmet capacity, especially in a hotspot scenario. The simulation results depict that interference modeling increases unmet capacity by 35%, highlighting the importance of interference consideration. To reduce unmet capacity, the ability to switch user polarization is proposed. The results demonstrate that user polarization switching enables a more balanced distribution and decreases unmet capacity by approximately 18.52% in the hotspot scenario. It also increases the minimum user rate by a factor of six. This significant network capacity improvement is achieved through the combined effect of intelligent user mapping in resource allocation and dual polarization capability in user terminals. In fact, user mapping to appropriate beams with suitable polarization selection reduces unintentional interference and leads to significantly lower unmet system capacity in hotspot scenario than the state‐of‐the‐art references.