Channel modeling for the stationary UE scenario

It has herein been shown that the stationary UE scenario is radically different from the moving UE scenario. The main difference is that the temporal fading for a stationary UE, in a rich scattering environment, is typically very small having Ricean statistics with large K values (K>10dB). This is in contrast to the traditional channel modeling scenario in which the UE is moving and the temporal fading exhibits Rayleigh statistics. Further, simple and straightforward temporal channel modeling, which conveniently may be added to standard ray based channel models, is presented and also successfully validated by measurements. The proposed modeling is simple and has thus some limitations. Firstly the model assumes that the scattered waves originate from a single point at the centre of the scatterer. Moreover, it is not taken into account that the scattered waves themselves are reflected off objects in the environment. This might have some negative impact if e.g. beamforming techniques are used to null out the temporal varying contribution. Secondly, the model has only been evaluated based on a few measured scenarios. In order to assess if the model is generally valid more measurements in different scenarios such as macrocell, outdoor, shopping mall etc. have to be performed.