On The Vehicle-Vehicle Network Propagation Channel Modeling And Spatial-Temporal Correlation Properties

With the rapid increase of road traffic density,issues of road safety and traffic flow management need to be resolved.The vehicular networking communication system can effectively improve the safety and convenience of road traffic.It has become one of the key technologies of the fifth generation(5G)mobile communication system.The propagation channel of vehicular networking is significantly different from the traditional mobile channel due to the rapid movement of vehicles and the limited mobile area.Therefore,the channel characteristics obtained by the cellular system cannot be directly applied in the vehicular networking communication scenario.The wireless channel measurement,modeling and simulation for the vehicular networking communication system has become one of the hotspots in the field of vehicular networking communication research.In this paper,different vehicleto-vehicle(V2V)non-stationary propagation channel models are proposed for uniform motion and arbitrary three dimensional(3D)motion scenarios,respectively.The corresponding time-variant channel parameter evolution algorithm and the spatial-temporal correlation characteristics of the V2 V channel including the spatial correlation function(SCF)and the temporal correlation function(TCF)are derived in detail.On this basis,a simulation application software for the vehicular networking propagation channel is designed and implemented.The main work of this paper is as follows:(1)The theoretical basis of V2 V multiple-input multiple-output(MIMO)channel model is briefly introduced.We present several typical V2 V channel models,including deterministic channel models and stochastical channel models.Meanwhile,the SCF and TCF of V2 V channel are analyzed.(2)Different novel Geometry-Based Stochastic Models(GBSM)for V2 V non-stationary channels are proposed for uniform motion and arbitrary 3D motion scenarios,respectively.Meanwhile,the extended time evolving algorithms of channel parameters,i.e.,the path number,path delays,path powers,and angles of arrival and departure,are given and analyzed.Under 3-D non-isotropic von Mises-Fisher(VMF)scattering scenarios,the closed-form and approximate expressions of time-variant SCF and TCF are also derived and analyzed.Simulation results show that the theoretical SCFs of proposed model match well with simulated and measured results.(3)A simulation application software for the vehicular networking propagation channel is designed and implemented.This software has several abilities such as configuration interface,real-time simulation of vehicular networking propagation channel,and statistical characteristics analysis.On this basis,we verify the software by comparing the simulation results with the measured ones.The results show that the system performance of the software is consistent with the measurements.Therefore,the software can be applied for real-time simulation and analysis of the vehicular networking communication system.