Physical modeling of line-of-sight wideband propagation in a city street for microcellular communication

This paper proposes a three-dimensional (3D) spatial variant wideband multi -ray model for line-of-sight radio wave propagation in a city street. An an alytical expression of the spatial variant channel transfer function is der ived. The model provides 3D propagation information for both the base and m obile stations, e.g., direction of arrival, which makes it useful in antenn a array applications. The developed model can be used to predict both wideb and, e.g., angle and delay spread, and narrowband, e.g., path loss, propaga tion characteristics in a city street with any number of crossing streets o f different widths. The proposed 3D wideband model is compared with an expe rimentally verified two-ray wideband model described in [18]. The model is easy to implement and fast to compute since there is no searching for coupl ing rays.