Visibility of far clusters in directional mobile radio channels

We describe a new approach to determine the visibility of far clusters as seen from the receiver at a certain location in a directional radio channel. The probability density functions of visibility regions and invisibility regions are proposed based on the statistical description of the terrain and the specular properties of far clusters. The Neyman-Pearson approach is then applied to detect the visibility of an exiting far cluster in a multi-cluster scattering environment. We further discuss the application of the detection technique in the context of average-received-power maximization in a multiple antenna beam system.