Analysis of fading statistics based on geometrical and statistical channel models

Introduction of antenna arrays in high speed wireless communication systems has made researchers to propose numerous scattering models like circular, elliptical and eccentro scattering models. These and their derived models provide angle of arrival distributions for macro, micro and Pico cellular environment using uniform and Gaussian distributed scatterers around BS and MS. In this paper, we analyze these scattering models using their second order statistics like level crossing rates, average fade durations, coherence distance and auto covariance. Effect of the Doppler spread on these statistics is also elaborated. The models are also compared quantatively on the basis of multipath shape factors like the angle spread, angular constriction and direction of maximum fading.