Geometric Models for Angle and Time of Arrival

Summary

This chapter dealt with a statistical description of several geometric scattering models: the elliptical scattering model, the circular scattering model, and the Gaussian density model. These models are very useful in simulation studies of wireless communication systems in a variety of scenarios. The quantities of interest in these models are the probability density functions for the angle of arrival and time of arrival. The elliptical scattering model is appropriate for microcells where both the transmitting and receiving antennas are embedded in a scattering environment. The circular scattering model is more suitable for a macrocell type of environment where one antenna (the base-station antenna) is placed well above the surrounding clutter. In such a case only scatterers in the vicinity of the low-lying mobile antenna are important. By varying the standard deviation of the Gaussian density function, the extent of significant scatterers around the mobile can be varied in a Gaussian density model, and the model finds use both in a microcell as well as in a macrocell environment.