ANGULAR SIGNAL DISTRIBUTION AND CROSS-POLARIZATION POWER RATIO SEEN BY A MOBILE RECEIVER AT 2.15 GHz

In mobile radio reception, signals typically arrive at the receiver antenna from a wide range of directions due to multipath propagation. This can be described by a direction-of-arrival (DoA) distribution of the propagation environment. If the DoA distribution is known, the Doppler spectrum and the autocorrelation function can be directly computed [1]. Furthermore, handset antenna performance can be evaluated by the concept of mean effective gain (MEG) [2], which is the ratio of the mean power received by the antenna to the total mean incident power. The DoA distributions for both vertically polarized (VP) and horizontally polarized (HP) waves and the cross-polarization power ratio (XPR) are needed in the evaluation of the MEG. Also the evaluation of pattern and polarization diversity techniques require the knowledge of DoA distributions of both polarizations. Therefore it is useful to know the form of the DoA distributions in different mobile communication environments.