A modified model for multi-paths distribution under mobile environment

In mobile communication systems, objects which can reflect and scatter radio waves exist between transmitter and receiver. The relative position of these objects varies with the random movement of transmitter and receiver, making the radio waves reach the receiver via different paths. The extent of fading and distortion of the reception signals depends on the actual path distribution of the radiowave propagation. The author presents a Poisson distribution function of paths by use of two stochastic processes. The first process, which is a Poisson process, describes the paths occurring, and the second one, which is an exponential process, describes the paths standing. However, a notable error exists between the Poisson and the measurement results. The author also provides a modified Poisson model which is more consistent with the measurement model