Effect of Mobile Motion on the Temporal Characteristics of the Channel

Propagation models are low-cost and handy means to accurately predict radio wave propagation behavior. In this paper we discuss the change in temporal statistics of the multipath signals when a mobile station (MS) traverses a distance inside the coverage area. The paper emphasizes the delay spread of the multipath signals received at each instant of time during MS motion. We identify two different cases for the change in the scattering environment regarding the terrain and clutter surrounding MS as it moves. The derived formulae, in closed form, can easily be used to simulate time variability of temporal spread as a result of MS motion. Proposed theoretical results can therefore be extended to design efficient equalizers to combat intersymbol interference (ISI) in time varying frequency selective fading channels