  We investigate the effect of channel aging on multi-cell massive
multiple-input multiple-output (MIMO) vehicular networks in a generic
non-isotropic scattering environment. Based on the single cluster scattering
assumption and the von Mises distribution assumptions of the scatterers'
angles, an aging channel model is established to capture the joint effect of
spatial and temporal correlations resulting from different angular spread
conditions in various application scenarios. Expressions of the user uplink
transmission spectral efficiency (SE) are derived for maximum ratio (MR) and
minimum mean square error (MMSE) combining. Through numerical studies, the area
spectral efficiency (ASE) performance of the network is evaluated in freeway
and urban Manhattan road grid scenarios, and easy-to-use empirical models for
the optimal transmission block size for ASE maximization are obtained for the
evaluated scenarios.
