Characterisation of Multipath Phenomena
J. D. Parsons · 2001
Chapter 5 is concerned with characterising multipath phenomena. The concepts of slow and fast fading are introduced and this leads to a discussion of the nature of multipath propagation under static and dynamic conditions and the existence of Doppler shift. The chapter also covers: Models that have been suggested to explain the observed signal properties (with emphasis on a 3-dimensional approach based on scattering); Statistical expressions for various properties of the signal envelope and phase, including the correlation between the envelopes at spatially separated points; Rician fading; The properties of the signal received at a base station using antennas that are separated both horizontally and vertically; The magnetic field components of the electromagnetic field; Signal variability and the statistics of the mean signal and the fast and slow fading; Large-area statistics.