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Researchers from the Antenas & Propagation group of IT in Leiria went on an extensive mission to Rio de Janeiro (Brazil) to conduct a two-week measurement campaign in highly populated areas of Rio, such as Gávea, Leblon, Ipanema and Rodrigo de Freitas Lagoon.
While in Brazil 5G is on hold as spectrum auction is delayed, researchers at IT in Leiria, led by Prof. Rafael Caldeirinha, teamed up last month with Prof. Luiz Silva Mello and his research team at Pontifical Catholic University of Rio de Janeiro (PUC-Rio), for a thorough measurement campaign at key 5G New Radio frequencies, i.e. 750 MHz, 2.5 and 3.5 GHz, including both narrowband and wideband measurements, under the project “Propagation 5G - Study and optimisation of propagation models for 5G”, funded by FCT/CAPES.
Under very high temperatures, with thermal sensation reaching 54 ºC at times (“only possible when powered by coconut water, despite the “thanks-God” air-conditioning of the van”), researchers from both institutions managed to drive around the busy streets and avenues of Rio to collect radio signal levels as part of their intention to create an extensive measurement database, for the development and optimisation of propagation models for 5G systems. Such huge amount of collected data is currently being processed and will be used to develop accurate and more efficient path loss propagation models, suitable for radio-climatic conditions and urbanisation characteristics observed in Brazil and Portugal.
Upcoming drive tests will take place in Portugal during 2020, including indoor measurements at 28 GHz.