Capacity studies of MIMO channel models based on the geometrical one-ring scattering model

摘要

Simulation results for the capacity of multiple-input multiple-output (MIMO) mobile radio channels are presented in this paper. Our MIMO channel simulation model is based on the so-called one-ring scattering model with two antennas at both the base station (BS) and the mobile station (MS) side. For the capacity study, we have investigated the influence of various model parameters, such as the angle spread at the MS, the mean angle of arrival (AOA), and the orientation of the antenna elements. The Doppler effect is also taken into account. Nonisotropic scattering around the MS is modelled by the von Mises distribution. The presented simulation results show an excellent correspondence between the statistical and the time average of the capacity. Furthermore, it turned out that a large distance between the antenna elements is not a guarantee for high capacity. Simulation results are also provided for the level crossing rate (LCR) and the average duration of fades (ADF) of the MIMO channel capacity.