基于几何街道散射场景的车载移动信道模型

摘要

为了研究室外视距(line of sight,LoS)和非视距(non-LoS,NLoS)传输场景中车辆与车辆(vehicle-to-vehicle,V2V)之间的无线通信系统,提出一种基于几何街道散射场景的统计信道模型,其发射端和接收端都处于移动状态.先假设有无穷多的散射体随机分布在街道两侧;并且在发射端和接收端都采用多天线技术,然后模型定量给出了几何街道散射场景下到发射角(angle of arrival,AOD)和到达角(angle of arrival,AOA)之间的几何关系.同时研究了信号在几何散射信道模型中的空间互相关函数、时间自相关函数(autocorrelation function,ACF)、频率互相关函数以及多普勒功率谱密度(power spectral density,PSD)的影响.理论分析和仿真结果表明提出的V2V通信系统的无线信道的统计特性符合理论和经验,拓展了多输入多输出宽带V2V通信系统的研究.%In order to research the vehicle to vehicle (V2V) communication systems under line of sight (LoS) and non-LoS (NLoS) propagation scenario,a statistical channel model based on a geometric street scattering channel model is proposed,in which both the transmitter and the receiver are moving.Assuming that there is an infinite number of scatterers randomly distributed on the two sides of the street,and both the mobile transmitter and receiver are adopted multi antenna technology.The proposed model quantitatively analyzes the relationship between the angle of departure (AOD) and the angle of arrival (AOA) and then analytical expressions of the signal in geometrical scattering channel model of the space cross-correlation functon,temporal autocorrelation function (ACF),frequency cross-correlation function and Doppler power spectral density (PSD) are also presented.Theoretical analysis and simulation results show that the statistical characteristics of the proposed V2V communication system are consistent with the theory and experience,and expand the research of multi input and multi (MIMO) output broadband V2V communication system.