A Survey of Geometrically-Based MIMO Propagation Channel Models

The paper presents a classification of multiple-input multiple-output (MIMO) geometry-based stochastic channel models (GSCM). Based on the shape of the scatterers, the models are distinguished between regular-shaped GSCM (RS-GSCM) and irregular-shaped GSCM (IS-GSCM). The proposed models for regular shaped scattering environments, such as, one-ring, two-ring, and elliptical along with the ones for irregular shaped scattering environments, such as, streets and tunnels are reviewed extensively. The specification of each model in terms of appropriateness to be deployed for narrowband and/or wideband channels will be investigated. To give an insight into GSCM, the wideband geometric modeling of a hollow-disk scattering environment is represented. The cross-correlation function (CCF) of the mobile station (MS) and the base station (BS) antenna elements is computed and then calibrated/verified with the one achieved by the Radio-wave Propagation Simulator (RPS). Finally, the capacity of the channel calculated by RPS is compared with the one derived from the channel model matrix. The numerical results show that the capacity curves are very close.