星地混合系统的动态频谱共享

Dynamic Spectrum Sharing in Hybrid Satellite-Terrestrial Systems

下一代通信技术的目标是实现全面移动和智能互联。为了实现这一愿景,需要将卫星和地面等异构网络进行无缝集成,构建星地混合系统。针对星地混合系统用频特点和存在的问题,为了提高频谱使用效率,对适用于星地混合系统的动态频谱共享技术进行了分析讨论,重点分析了频谱数据库、频率和功率分配、波束赋形及跳波束等一些适用于星地混合系统且非常有发展前景的技术,讨论了它们在不同场景下的适用性以及面临的挑战。

The next generation of mobile communications technology will enable a fully mobile and smartly connected society.To materialize this vision,the integration of heterogeneous networks such as terrestrial and satellite is required to support and exploit hybrid satellite-terrestrial systems.In view of the frequency features and problems of hybrid satellite-ground systems,in order to improve the spectrum utilization,some very promising dynamic spectrum sharing techniques suitable for the hybrid satellite-ground system are analyzed,such as spectrum database,frequency and power allocation,beamforming,and beam hopping.Their applicability and challenge in different scenarios are also presented.