Research On Channel Modeling And Simulation Of 5G/B5G-based Vehicular Communication

In recent years,the research of fifth-generation(5G)-based and beyond 5G(B5G)-based vehicular communication technology has become a hot topic.An important part of analyzing and optimizing each new generation of communication technology and system design is to study the corresponding propagation characteristics and channel models.Considering the introduction of new technologies in the 5G and B5 G network and the special characteristics of the vehicular communication environment,such as the distribution of moving and static scatterers/clusters in vehicular communication,the impact of vehicle traffic density(VTD)and vehicle movement direction,and the channel non-stationarity in the time domain and array domain,it is significant to establish a vehicular communication model based on 5G/B5 G networks,and explore the corresponding channel statistical characteristics.This paper analyzes the shortcomings of the existing vehicle channel models,and proposes three channel models.They are 1)a 2D regular shaped geometry-based stochastic model(RS-GBSM)based on vehicle-to-vehicle(V2V)channels,2)a 3D RS-GBSM based on unmanned aerial vehicle(UAV)aided vehicular communication channels,and 3)a 3D irregular shaped geometry-based stochastic model(IS-GBSM)based on V2 V channels.Based on the proposed model,the corresponding statistical characteristics are derived,including space-time-frequency correlation function(STF-CF),Doppler power spectral density(DPSD),level crossing rate(LCR),and average fading duration(AFD).In addition,the three proposed models distinguish between moving and static scatterers/clusters in the vehicle environment,and they have the ability to investigate the effects of different VTDs on channel statistics.Based on the reference models of Model 1 and Model 2,corresponding simulation models with limited complexity are developed in this paper.The simulation results of statistical characteristics between the reference models and simulationmodels show high consistency,which proves the accuracy of the theoretical derivation and the practicability of the proposed simulation model.In order to simulate the actual vehicular communication scenario more effectively,Model 3 realizes the establishment of the channel non-stationarity in the time domain and the array domain through cluster evolution and the update of the model geometric relationship.By adjusting model-related and environment-related parameters,the proposed model can be applied to different communication scenarios.This paper explores the impact of some important parameters on the channel statistical characteristics,including VTD,vehicle movement direction,antenna spacing,the direction and height of the UAV and so on.The numerical simulation results of the model provide some important conclusions and general rules to help us maintain a stable communication channel,which can be regarded as an effective guide for the design of future 5G/B5 B vehicular communication systems.At the same time,the proposed model in this paper further enriches the V2 V and UAV channel model libraries.Finally,this paper summarizes and contrasts the characteristics of the proposed model,and analyzes the defects in the existing vehicle channel modeling and channel measurement work,and provides a new research direction for the modeling of next-generation vehicular communication channels.