Real-time ray-based channel generation and emulation for UAV communications

作     者：Yang YANG Tingpeng LI Xiaomin CHEN Manxi WANG Qiuming ZHU Ruirui FENG Fuqiao DUAN Taotao ZHANG Yang YANG;Tingpeng LI;Xiaomin CHEN;Manxi WANG;Qiuming ZHU;Ruirui FENG;Fuqiao DUAN;Taotao ZHANG

作者机构：State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System(CEMEE)Luoyang 471003China College of Electronic and Information EngineeringNanjing University of Aeronautics and AstronauticsNanjing 211106China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2022年第35卷第9期

页      面：106-116页

核心收录：

学科分类：08[工学] 082503[工学-航空宇航制造工程] 0825[工学-航空宇航科学与技术] 

基　　金：supported in part by CEMEE State Key Laboratory Fund(No.2020Z0207B) in part by the National Key Scientific Instrument and Equipment Development Project,China(No.61827801) in part by the State Key Laboratory of Integrated Services Networks Fund,China(No.ISN22-11) in part by the Fundamental Research Funds for the Central Universities,China(Nos.NS2020026 and NS2020063) 

主　　题：Unmanned aerial vehicle Channel model Ray-based channel emulation Ray tracing Software defined radio Ray coefficient 

摘      要：A real-time ray-based hardware emulator for Unmanned Aerial Vehicle(UAV) communication channels which suits for the Three-Dimensional(3D) dynamic scenarios and considers the movements of both terminals is developed in this paper. The time-variant channel parameters, i.e.,ray delay, ray gain, and ray Doppler frequency are precalculated in the host by using the Ray Tracing(RT) method. Meanwhile, RT simulation dramatically increases the number of valid rays. To address the problem of resource limitation and huge computational burden in the implementation,an efficient ray coefficients generation method based on iteration is proposed and *** the advantages of low cost and high flexibility, a Software Defined Radio(SDR) hardware platform is used to emulate the ray-based UAV channels by utilizing the compact architecture including the Time-Division(TD) scheme and Tapped-Delay Line(TDL) for channel ***, hardware measurement results demonstrate that the properties of emulated channel, i.e.,Power Delay Profile(PDP) and Doppler Power Spectrum Density(DPSD) consist with the simulated ones, which verifies the correctness of hardware implementation. The proposed channel emulator provides an efficient way for optimization, verification, and evaluation of UAV communication systems.