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.