Propagation modelling of cellular mobile communication on non-Rayleigh and non-Rician fading channels

If a signal is transmitted between a base station and a mobile unit that is moving through a multipath environment, wave interference among the multipath components results in severe fading of the received signal. Amplitude fluctuations in signals received over mobile radio channels are typically modelled by a Rayleigh distribution. The Rician distribution applies to the case when there is a direct line-of-sight (LOS) component which contributes to the received signal. If there is a signal steady component and a large number of the multipath signals, the propagation environment of the mobile radio is modelled by Rician distribution. These models are theoretically predicted if a large number of random multipath signals exist in the channel with all signal contributions on the same order of magnitude (i.e. no dominate components). When the effective number of scatterers (N) is small, significant deviations from the both Rayleigh and Rician distributions can be expected. In this paper, we tried to examine same statistical characteristics in non-Rayleigh and non-Rician communications channels. Results indicates that, except for the 2 scatterer channel, the computed variations are well fitted to those of theoretically predicted Rayleigh and Rician models