Applicability of Walfisch-type urban propagation models

The applicability of different propagation models based on the Walfisch-Bertoni or the Walfisch-Ikegami formulations is studied. When this type of model is applied to real urban cells, large areas with errors often appear. The origin of some errors and a proposal to improve the applicability of Walfisch-type models, based on a measurement campaign, are described.