新型基于几何的3D非平稳V2V MIMO信道模型

针对具有多种通信场景和收发端快速移动的V2V通信系统,提出一种基于几何的3D V2V MIMO信道模型.该模型首次结合双球模型和半椭球体模型,分别使用双球和半椭球体模型表征动态和静止散射体;考虑到收发端的运动状态,引入时变的出发角、到达角以及路径长度用于研究V2 V信道的非平稳特性;对所提出的信道模型,推导了空间互相关、时间自相关和多普勒功率谱密度等统计特性函数,分析了不同场景和参数下的V2 V信道统计特性.结果表明,不同场景下V2 V信道各统计特性有较大差异,信道相关性与时间变化和散射体分布密切相关.仿真结果与理论值的高度拟合验证了模型的正确性,为V2 V通信链路的设计提供了理论依据,拓展了基于几何的V2 V信道建模领域的研究.

Novel geometry-based 3D non-stationary model for vehicle-to-vehicle MIMO channel

This paper proposed a novel geometry-based 3D model for multiple-inputs and multiple-outputs(MIMO) vehicle-to-vehicle(V2V) communication system, which had the characteristics of multiple communication scenarios and moving transporter and receiver. This model combined the double sphere model and the semi-ellipsoid model for the first time and used the double sphere model and semi-ellipsoid model to represent dynamic and static scatterers respectively. Taking into account the movement state of the transporter and receiver, it introduced both time-varying angles and path lengths to study the non-stationary properties of V2V channel. For the proposed channel model, this paper derived the statistical characteristic functions such as spatial cross-correlation, temporal autocorrelation and Doppler power spectral density, and analyzed the statistical characteristics of the channel in different scenarios and parameters in depth. The observations and conclusions show that the various statistical properties of the V2V channel vary considerably in different scenarios, and the channel correlation is closely related to time variation and scatterer distribution. The height fitting between simulation results and the theoretical values verifies the correctness of the model, provides a theoretical basis for the design of V2V communication links, and expands the research in the field of geometry-based V2V channel modeling.