The Impact of Fixed and Moving Scatterers on the Statistics of MIMO Vehicle-to-Vehicle Channels

In this paper, we study the impact of fixed and moving clusters of scatterers on the statistics of multiple- input multiple-output (MIMO) vehicle-to-vehicle (V2V) channels. Double-bounce scattering is assumed for fixed scatterers, while single-bounce scattering is considered for moving scatterers. Starting from the geometrical street model, an analytical expression is derived for the channel gain taking into account the contributions of fixed and moving scatterers in a multiple-cluster scattering scenario. The statistical properties of the proposed channel model are studied. Analytical solutions are provided for the three-dimensional (3D) space-time cross-correlation function (CCF), the 2D space CCF, and the temporal autocorrelation function (ACF). All theoretical results are validated by simulations.