Clustering Approach for Geometrically Based Channel Model in Urban Environments

Abstract

Advanced radio system designs have been proposed to overcome the radio channel caused by multipath effects in urban environments or even take advantage of it to achieve higher performance. In this letter, we present a clustering approach to represent the power delay angle profiles (PDAPs) of the multipath components in urban environments. A cluster in an urban area originates from scattering points such as street apertures, large buildings, roof edges, or building corners. Unlike the previous geometrical models based only on single bounce reflection, our model represents the PDAPs by clusters plus background single bounce scatter components, i.e., waves that arrive at the receiver by double bounce at least. We present a numerical example for a typical outdoor scenario using the approach proposed for urban environments and including both temporal and spatial properties regarding path delay and angle-of-arrival (AOA).