A spatial channel model for multiple-antenna systems

Conventional multi-input multi-output (MIMO) models are not efficient in assessing the benefits of multiple-antenna systems with area limitation on antenna arrays in realistic propagation environments. Physical models, though capturing these factors, are too complex for tractable analysis. The paper presents a spatial channel model that takes into account these factors without sacrificing analytical tractability. In the model, Green's function for radiation is adapted to account for the array area limitation, and the clustering of propagation paths observed in recent spatial channel measurements is exploited to obtain a concise description of channel scattering.