A narrowband MIMO car-to-car channel model based on the geometrical street scattering model

Abstract

In this paper, we model a narrowband multiple-input multiple-output (MIMO) car-to-car (C2C) channel model based on the geometrical street scattering model. Starting from the geometrical model, a MIMO reference channel model is derived under the assumption of single-bounce scattering in line-of-sight (LOS) and non-LOS (NLOS) propagation environments. In the proposed channel model, an infinite number of scatterers are uniformly distributed in rectangular grids located on both sides of the street. Analytical solutions are presented for the three-dimensional (3D) space-time cross-correlation function (CCF), the temporal autocorrelation function (ACF), and the two-dimensional (2D) space CCF. An efficient sum-of-cisoids (SOC) channel simulator will be derived from the reference model. It is shown that the temporal ACF of the SOC channel simulator fits very well to that of the reference model. The proposed geometry-based channel simulator allows to study the effect of nearby street scatterers on the performance of C2C communication systems.