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A Novel Geometry-Based MIMO Channel Model for Vehicle-to-Vehicle Communication Systems

In this paper, we propose a novel three-dimensional (3D) geometry-based massive multiple-input multiple-output (MIMO) channel model for vehicle-to-vehicle (V2V) communication systems. Combining with the two-ring model and the semi-ellipsoid model, our proposed model can capture the non-stationary property of channel caused by both static and mobile scatterers in street environments. Based on the assumption of spherical wavefront, we use uniform planar array (UPA) at mobile transmitter and mobile receiver, and we derive the expression of Doppler shift due to the relative motion of the channel. We also develop a simulation model using countable scatterers. Moreover, we study the impact of rotation angles, the number of scatterers, the range of offset angles and the velocity of moving scatterers on statistical properties of the channel, and analyze the space-time correlation function. Finally, the simulation results show that the proposed model can well capture the characteristics of MIMO V2V channels.