智能超表面使能无人机高能效通信信道建模与传输机理分析

Channel Modeling and Characteristics Analysis for High Energy-Efficient RIS-Assisted UAV Communications

智能超表面(Reconfigurable Intelligent Surface,RIS)作为第六代(Sixth Generation,6G)移动通信中的潜在关键技术之一,具有低成本、低能耗和易于部署等特点.通过给电磁单元上的可调元件施加控制信号,可以实现对入射信号的幅度、相位、极化等调控,从而构造智能化的通信环境,为终端高能效无线通信提供了契机.本文首先基于无人机通信技术发展现状,阐明了将RIS技术引入无人机通信系统的必要性;然后,分析了RIS使能无人机高能效通信信道的传输机理,归纳了信道建模关键技术;最后针对RIS使能无人机高能效通信信道建模,总结和展望了未来的技术挑战与研究方向.

Reconfigurable intelligent surface(RIS)is one of the potential key technologies for sixth generation(6G)communications,which has the characteristics of low cost,low complexity,and easy deployment.By applying control sig⁃nals to adjustable elements on the electromagnetic unit,it has the ability to adjusting the wireless communication environ⁃ments,which provides a new opportunity to improve the high energy-efficiency performance of wireless communication systems.This paper provides a comprehensive overview of channel modeling and characteristics analysis for RIS-assisted unmanned aerial vehicle(UAV)high energy-efficiency communications.Firstly,based on the research basis of the UAV communications technologies,we clarify the necessities of introducing the RIS into UAV communications.Then,we sum⁃marize the key technologies for channel modeling and characteristics analysis for RIS-assisted UAV communications.Finally,we point out some future research directions in RIS-assisted UAV channel modeling and characteristics analysis.