Performance, Accuracy and Generalization Capability of Indoor Propagation Models in Different Types of Buildings

| In the last years different prediction models for indoor environments were developed for the frequency range between 500 MHz and 5 GHz. Each of these models has its own advantages and disadvantages. In this paper four of the most popular models are compared to one another and to measurements in different buildings. The comparison is limited to the prediction of the received power because two models are only able to predict the power. Two models are also able to predict the delay spread and one model is additionally able to predict the standard deviation of the instantaneous field strength (fast fading) related to the median field strength. For this last model a comparison of the results for the delay spread and the fast fading is also presented in this paper. Three different buildings were used for the comparison of the models. A new office building with concrete walls at the University of Stuttgart (Germany), an old office building with brick walls in Vienna (Austria) and the villa of Marconi, which is a very old building (brick and wood) in Bologna (Italy).