A semi-deterministic propagation model for predicting short-term fading statistics in urban environments based on the Nakagami- m distribution

In this paper, a semi-deterministic propagation model for predicting short-term fading statistics in urban environments is presented. An approach to include surface scattering into deterministic ray-optical propagation models in urban scenarios is derived. This approach considers the coherent and incoherent components of the scattered signal. A statistical characterisation of the received signal at the received position permits to model the short-term fading for a local area around the mobile position using the Nakagami- m distribution. The parameters of the Nakagami- m distribution are obtained taking into account the real environment from a digital map information of the urban area. Computer simulation results and experimental data are compared.