Polarization Dispersion Characteristics of Propagation Paths in Urban Mobile Communication Environment

In order to employ MIMO techniques the number of antenna branches must be increased and as a consequence the installation space requirements are increased. Since the installation space is limited, much attention is now focused on the utilization of polarization characteristics for MIMO configuration in order to relax the requirements. This is called Polarization-MIMO in this paper. In accurately evaluating the performance of Polarization-MIMO, a channel model that can handle the polarization dispersion characteristics of propagation paths is essential. Up to now, the spatial-temporal dispersion characteristics of the paths have been investigated in detail. However, there are few reports on the polarization dispersion characteristics. In this paper, we propose a new power profile for the linear polarized direction as an evaluation model for polarization dispersion, and clarify the analyzed power profile from measurement data in an urban macrocell environment.