摘要
As an important part of sixth generation(6G)integrated space-air-ground-sea networks,unmanned aerial vehicle(UAV)communications have aroused great attention and one of its typical application scenarios is the hilly environments.The related UAV air-ground(AG)channel characteristics analysis is crucial for system design and network evaluation of future UAV communications in hilly scenarios.In this paper,a recently conducted channel measurements campaign in a hilly scenario is presented,which is conducted at the center frequencies of 2.585 GHz and 3.5 GHz for different flight trajectories.Based on the measurement data,some key channel characteristics are analyzed,including path loss(PL),shadow fading(SF),Rician K-factor,root mean square(RMS)delay spread(DS),and temporal auto-correlation function(ACF).Finally,the comparison of typical channel characteristics under circular and straight trajectories is given.The related results can provide a theoretical reference for constructing future UAV communication system in hilly scenarios.
基金
supported by the National Key R&D Program of China under Grant 2021YFB1407001
the National Natural Science Foundation of China(NSFC)under Grants 62001269 and 61960206006
the Fundamental Research Funds of Shandong University under Grant 2020GN032
the Future Plan Program for Young Scholars of Shandong University
the State Key Laboratory of Rail Traffic Control and Safety(Contract No.RCS2022K009)
Beijing Jiaotong University,the Taishan Scholar Program of Shandong Province,the Key Technologies R&D Program of Jiangsu(Prospective and Key Technologies for Industry)under Grants BE2022067,BE2022067-1,and BE2022067-3
the High Level Innovation and Entrepreneurial Talent Introduction Program in Jiangsu
the EU H2020 RISE TESTBED2 project under Grant 872172.
