An ergodic wideband MIMO channel simulator based on the geometrical T-junction scattering model for vehicle-to-vehicle communications

In this paper, a wideband multiple-input multiple-output (MIMO) simulation model for vehicle-to-vehicle (V2V) channels in T-junction propagation environments is proposed. This simulation model takes the exact relationship between the angle-of-arrival (AOA) and the angle-of-departure (AOD) into account. In order to determine the parameters of the simulation model, the Riemann sum method (RSM) is applied. Furthermore, the statistical and ergodic properties of the simulation model are studied. Closed-form solutions are derived for the space-time-frequency cross-correlation function (STF-CCF), the two-dimensional (2D) spatial cross-correlation function (CCF), the temporal autocorrelation function (ACF), and the frequency correlation function (FCF). The excellent correspondence between the correlation properties of the simulation model and those of the underlying reference model are demonstrated. Owing to its simplicity and high accuracy, the proposed channel simulator is recommended as an efficient simulation tool for system designers to test and verify MIMO V2V transmission schemes under realistic T-junction scattering conditions.