A study of geometric channel modeling methods in wideband directional mobile radio channels

Conventional geometric channel models (GCMs) were applied to narrowband nondirectional modeling. The main purpose of this paper is to provide a unified analysis on the spatial pattern of scatterer distributions in the E-space for wideband directional channels (WDCs). One advantage of this approach is the availability of analytical expressions relating signal properties in the respective domains to channel properties. A further virtue of this method is to exploit the geometric distribution of scatterers from a physical wave-propagation viewpoint. The analysis is based on the recently proposed semi-geometrically based statistical (SGBS) model and four heuristic rules, which are so formulated as to provide the underlying relationship between the canonical model and the physical channel it represents. Finally, a layered multiple-input-multiple-output channel model is proposed by applying the generic methodology.