@article{Ramos_Vargas_da Silva Mello_Pereira_Vieira_Gonçalves_Rego_2021, title={Measurement and Prediction of Short-Range Path Loss between 27 and 40 GHz in University Campus Scenarios}, volume={36}, url={https://jcis.sbrt.org.br/jcis/article/view/790}, DOI={10.14209/jcis.2021.20}, abstractNote={<pre style="-qt-block-indent: 0; text-indent: 0px; margin: 0px;"><span style="color: #000000;">In this paper, we present the results of short-range path loss measurement in the microwave and millimetre wave bands, at frequencies between 27 and 40 GHz, obtained in a campaign inside a university campus in Rio de Janeiro, Brazil. Existing empirical path loss prediction models, including the alpha-beta-gamma (</span><span style="text-decoration: underline; color: #000000;">ABG</span><span style="color: #000000;">) model and the close-in free space reference distance with frequency-dependent path loss exponent (</span><span style="text-decoration: underline; color: #000000;">CIF</span><span style="color: #000000;">) model, are tested against the measured data, and an improved prediction method that includes the path loss dependence on the height difference between transmitter and receiver is proposed. The main contribution of this paper is the use of the Fuzzy technique to perform path loss predictions for short links in the millimetre wave range, from 27 to 40 GHz, providing lower errors when compared to the traditional </span><span style="text-decoration: underline; color: #000000;">ABG</span><span style="color: #000000;"> and </span><span style="text-decoration: underline; color: #000000;">CIF</span><span style="color: #000000;"> models. However, it should be noted that the Fuzzy technique uses a set of equations to perform the prediction and the attenuation coefficient is not explicit as in the classical models. Also, a non-negligible correlation between the difference in height between transmitter and receiver positions and the path loss in such short links (i.e., the path inclination) has been observed and requires further investigation. If confirmed, it could provide an additional parameter to improve the accuracy of the traditional </span><span style="text-decoration: underline; color: #000000;">ABG</span><span style="color: #000000;"> model.</span></pre>}, number={1}, journal={Journal of Communication and Information Systems}, author={Ramos, Glaucio Lopes and Vargas, Carlos and da Silva Mello, Luiz and Pereira, Paulo and Vieira, Robson and Gonçalves, Sandro and Rego, Cássio}, year={2021}, month={Nov.}, pages={184–191} }