无人机系统地空信道建模与仿真  

The Simulation and Modeling of Air-Ground Channel for UAVs Systems

作　　者：高猛 屠佳 纪雅峻 吴世凯 GAO Meng;TU Jia;JI Ya-jun;WU Shi-kai(Air Force Communication Sergeant School,Dalian Liaoning 116600,China;College of International Studies,National University of Defense Technology,Nanjing Jiangsu 210039,China)

机构地区：[1]空军通信士官学校,辽宁大连116600 [2]国防科技大学国际关系学院,江苏南京210039

出　　处：《计算机仿真》2023年第8期41-47,109,共8页Computer Simulation

基　　金：空军通信士官学校科研学术基金预先研究基金项目(19KXYY2F1-04);军事理论创新研究基金计划课题(20KXJL3C1-12)。

摘　　要：无人机广泛应用于军事和民用领域,而无人机通信更是未来移动通信发展的方向之一。区别于有人机通信,无人机通信的应用环境复杂多样,这也就是决定其地空信道更为复杂多变。在分析无人机无线链路特性的基础上,归纳了无人机水面、山地、城市和近郊地区等典型应用场景下的地空信道衰落特性,构建了信道大尺度和小尺度衰落的数学模型,并且给出了莱斯因子、信道阶数、最大时延扩展等关键信道参数,并仿真分析不同应用环境下OFDM和HMCT两种调制方式的无人机通信系统性能。经仿真验证,两种调制方式都表现出较好的误符号率性能,而HMCT调制的抗无线信道衰落损伤能力更优。Unmanned aerial vehicles(UAVs)are being used increasingly in military and civilian applications.Differing from conventional piloted aircraft,the application scenarios of UAVs are various,which implies that the air-ground channels for UAV-aided wireless communication systems are complicated.Firstly,based on the features of the wireless communication link,the air-ground channel characteristics were analyzed.Secondly,the mathematical models of large-scale fading and small-scale fading were described,while the key channel parameters of Rician factor,channel orders and maximum delay spread were provided,concerned with over-water settings,hilly and mountainous settings,and suburban and near-urban settings.Finally,the simulation performances of OFDM and hexagonal multi-carrier transmission(HMCT)modulation for UAV-aided communication systems in different environments were compared.The simulation results confirm that both modulations have good symbol error rate performance,and HMCT modulation performs better in combatting the fading of wireless channels.

关 键 词：无人机 地空信道 六边形多载波系统 链路特性 

分 类 号：TP945.12[自动化与计算机技术]