Statistical Channel Modeling And Simulation Analysis Of Wireless Communication In The Internet Of Vehicles

The more advanced communication technologies employed in the fifth generation(5G)communication systems put higher requirements for 5G channel modeling.The biggest challenge in the research area of wireless channel modeling is to develop efficient and accurate channel models which can mimic all the propagation characteristics affecting the performance analysis of wireless communication systems.The vehicle-to-vehicle(V2V)channel modeling,as one of the hottest topics in 5G channel modeling,has drawn increasing attention from researchers.In V2 V communication scenarios,both the transmitter(Tx)and receiver(Rx)are in a fast-changing propagation environment.The multi-mobility characteristics make V2 V channels distinctly different from conventional cellular channels which significantly increase the channel model complexity.In addition,wireless communication multiple input multiple output(MIMO)system is based on multiple transmit and receiving antennas.Using multiple antennas offers channel capacity gain under uncorrelated multipath fading propagation,so as to satisfy the increasing demand for high data rate for V2 V communication.This article is mainly based on spatial link channel modeling,focusing on MIMO system and vehicle networking wireless communication analysis,in-depth study of MIMO system antenna array,spatial fading correlation(SFC),time-space-frequency correlation function and Doppler power spectral density(PSD),etc.,analysis the relevant statistical characteristics of the channel and provide help for the design of the vehicle networking wireless communication system.The research work of this article is as follows.Firstly,in order to establish a stable and efficient vehicle-mounted mobile communication system,a broadband MIMO V2 V channel model suitable for urban oblique T-junction street intersection scenes is proposed.Based on the geometric channel model,the distribution of scatterer is described,and single-bounce and double-bounce paths are considered.The double reflection path and the introduction of street angles make the model more versatile and flexible.Under non-isotropic scattering conditions,the relevant parameters of the model are determined according to the precise relationship between the angle of departure(Ao D)and the angle of arrival(Ao A).The spatial-time-frequency correlation function of the channel and the MIMO channel capacity are derived and analyzed.Numerical simulation results indicate that the model can be used to simulate V2 V communication at an oblique T-junction intersection,supplementing the vacancy of the channel model for such street scenes,and expanding the research and application of the MIMO V2 V channel model.Secondly,in order to study and analyze the performance of the V2 V communication system in the ring tunnel scenario under 5G communication,a three-dimension(3D)broadband non-stationary twin-cluster channel model was established.In this model,the mobile transmitter(MT)and the mobile receiver(MR)move along the road of the ring tunnel,respectively,and the direction of their movement is related to the speed of MT nd MR and the parameters of the ring tunnel.The received signal consists of line of sight(Lo S)propagation components and non-line of sight(NLo S)propagation components scattered by the twin-cluster.The birth-death algorithm is introduced to model the appearance and disappearance process of scattering clusters on the time array and axis,which makes the channel model non-stationary in nature.The spatial and temporal correlation functions of the channel and the Doppler power spectral density are derived.By comparing the theoretical and simulation results,it is proved that the model can correctly describe the MIMO V2 V communication in the 5G ring tunnel environment.Finally,in view of the characteristics of time-varying speed and motion trajectory of mobile terminals,a multi-mobility 3D non-stationary wideband MIMO channel model for future V2 V communication is proposed.In order to describe the non-stationary of the multi-mobility V2 V channel,the proposed model uses a time-varying acceleration model to describe the motion process of the mobile terminal.The evolution process of the model parameters over time and the random characteristics of the phase shift caused by the time-varying Doppler frequency are deduced.This model has high versatility and can be used to describe the dynamic change of mobile terminal V2 V communication scenarios.The important statistical characteristics of the model are derived and studied under non-isotropic scattering conditions,such as time-varying spatial-temporal correlation,time-varying Doppler power spectral density,etc.The simulation results are consistent with the theoretical results,verifying the accuracy of the model.The proposed modeling solution can provide a comprehensive and accurate description of the physical propagation characteristics of the real V2V channel.