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- Characterization of WiMAX propagation in microcellular and picocellular environmentsPublication . Barbiroli, Marina; Carciofi, Claudia; Degli-Esposti, Vittorio; Fuschini, Franco; Grazioso, Paolo; Guiducci, Doriana; Robalo, Daniel Luís Silveira; Velez, FernandoIn this paper different propagation models for coverage prediction of WiMAX microcellular and picocellular urban environments and for WiMAX indoor femtocells at 3.5 GHz are compared with experimental data. Results obtained for different urban and indoor environments show that statistical models are quite far from good agreement with experimental data while deterministic ray-tracing models provide appropriate prediction in all different complex analyzed environments.
- Experimental characterisation of WiMAX propagation in different environmentsPublication . Robalo, Daniel Luís Silveira; Oliveira, João; Velez, Fernando; Petrini, Valeria; Barbiroli, Marina; Carciofi, Claudia; Grazioso, Paolo; Fuschini, FrancoThe aim of this work is to continue the cooperation on Fixed WiMAX experimental propagation characterization between Instituto de Telecomunicações - DEM of University of Beira Interior, Portugal, Fondazione Ugo Bordoni and the Department of Electronics and Information Systems of the University of Bologna, both from Italy. The field trials addressed different environments, i.e., suburban and open areas in a hilly terrain for the study of the propagation characteristics of WiMAX systems. The IEEE 802.16-2004 equipment operates at 3.5 GHz with a bandwidth of 3.5 MHz. Different antenna heights are considered. The measurements have been performed in outdoor, indoor and mixed environments, with omnidirectional and 120° sectored antennas. In the outdoor environment, results show an adequacy between the trend-curve for the experimental results with the modified Friis equation with propagation exponent 2.71.