Diversity property of millimeter wave wireless networks against localized rain

Macroscopic behaviors of rain and link availability together with diversity effects are evaluated in the previous studies on the intensive propagation. These studies focus on the long distance radio links such as terrestrial and satellite communications, where relatively weak rain events are the main interest. In this paper, evaluation of behavior of rain and its effect on link attenuation in Tokyo Tech millimeter-wave model mesh network are presented. The unique effects due to highly localized behaviors of the strong rain have become clear and are characterized in terms of variogram instead of correlation coefficients. Spatial separation even in the small network consisting of the links less than 1 km provides effective diversity branches for better diversity gain.