A new non-stationary (NS) geometry-based stochastic model (GBSM) is presented for developing and testing the communication systems of vehicle-to-vehicle (V2V) applications, which considers the three-dimensional (3D) scattering environments and allows 3D velocity as well. In this paper, the proposed GBSM for NS V2V channels allowed 3D velocity variations and was more suitable for actual V2V communications because it provided smoother transitions between the consecutive channel segments. The time-variant channel coefficient and the channel parameters, i.e., Doppler frequencies, path delay and power, angle of arrival (AoA), and angle of departure (AoD), were analyzed and derived. Likewise, the theoretical statistical properties as the probability density function (PDF), the auto-correlation function (ACF), and Doppler power spectral density (DPSD) were also analyzed and derived under the von Mises–Fisher (VMF) distribution. Finally, the theoretical and measured results were well coordinated alongside the implemented results, which confirmed the feasibility of the introduced model along with the theoretical expressions.

中文翻译：

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适用于非平稳V2V通道的新型GBSM，允许3D速度变化

提出了一种新的基于几何的非平稳（NS）随机模型（GBSM），用于开发和测试车对车（V2V）应用的通信系统，该系统考虑了三维（3D）散射环境并允许3D速度也是如此。在本文中，为NS V2V通道提议的GBSM允许3D速度变化，并且更适合实际的V2V通信，因为它在连续的通道段之间提供了更平滑的过渡。分析并推导了时变信道系数和信道参数，即多普勒频率，路径延迟和功率，到达角（AoA）和离开角（AoD）。同样，理论上的统计特性包括概率密度函数（PDF），自相关函数（ACF），还根据冯·米塞斯·费舍尔（VMF）分布对多普勒功率谱密度（DPSD）和多普勒功率谱密度（DPSD）进行了分析和推导。最后，理论和测量结果与实施结果很好地协调，这证实了引入模型以及理论表达式的可行性。