无人机毫米波信道建模及统计特性研究  

On the Modeling and Characteristics Analyze for UAV-based Millimeter Wave Channels

作　　者：程乐乐 朱秋明[1] 陆智俊 陈小敏[1] 仲伟志[1] Cheng Lele;Zhu Qiuming;Lu Zhijun;Chen Xiaomin;Zhong Weizhi(Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space,Ministry of Industry and Information Technology,Nanjing University of Aeronautics and Astronautics,Nanjing,Jiangsu 211100,China;China Aerospace System Engineering Co.Ltd,Beijing 100070,China)

机构地区：[1]南京航空航天大学,电磁频谱空间认知动态系统工业与信息化部重点实验室,江苏南京211100 [2]中国航天系统工程有限公司,北京100070

出　　处：《信号处理》2019年第8期1385-1391,共7页Journal of Signal Processing

基　　金：国家重大科学仪器设备开发专项(2013YQ200607);航空科学基金(2017ZC52021);南京航空航天大学研究生创新基地(实验室)开放基金(kfjj20180408)资助

摘　　要：针对传统移动信道模型不适用于无人机毫米波通信场景的问题,本文基于射线追踪原理构建了一个无人机毫米波三维几何信道模型,并提出了一种针对该模型的信道参数更新算法,该算法考虑了通信距离、信号角度、路径时延和功率等传播参数的随时间演进过程。在此基础上,针对南京航空航天大学校园传播场景,研究分析了时延分布、时延扩展、角度分布和角度扩展等信道统计特性。数值仿真结果表明,本文模型能够有效复现无人机信道的时变非平稳特性,输出信道统计特性与实测结果吻合,可用于无人机毫米波通信系统的方案设计、性能优化和评估验证等领域。Traditional channel models cannot be used for UAV millimeter wave(mmWave)communication scenarios directly,by using the ray tracing theory,a three-dimensional(3D)geometry-based stochastic channel(GSCM)model for UAV mmWave communications is proposed.The updating algorithm of time-variant channel parameters is also developed and it considers the time evolving process of propagation parameters,i.e.,communication distance,signal angles,path delay and power.Meanwhile,for the propagation scenario of Nanjing University of Aeronautics and Astronautics campus,we analyzes the statistical properties of our proposed model such as time delay distribution,delay spread distribution,angle distribution and angle spread by simulation method.Simulation results demonstrate that the proposed model can reproduce the non-stationarity of fading channels and the simulated statistical properties agree well with the measured ones,which indicates its usefulness of the system design,performance optimization and evaluation for UAV mmWave communication systems.

关 键 词：无人机 毫米波信道 射线追踪 几何信道模型 

分 类 号：TN92[电子电信—通信与信息系统]