Browsing by Author "Angueira, P."
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Item Hidden node margin and man-made noise measurements in the UHF broadcasting bands(2012) Fadda, M.; Murroni, M.; Popescu, V.; Angueira, P.; Morgade, J.; Sanchez, M.; GENERALThis paper presents an extended study of the spectrum occupancy in the UHF frequency band (470-870MHz) in Spain and in Italy. The objective of the study is to establish by signal power measuring if cognitive devices are able to detect and distinguish in a Hidden Node scenario between empty and occupied TV channels. The study has been performed, for each of these two countries, at three different sites and at different heights over the ground for assessing the hidden node margin. The measurements in Spain were carried out in urban, suburban and rural environments close to the city of Bilbao while the measurements in Italy were carried out in Sardinia, in different urban areas of the city of Cagliari, surrounding suburban spots and a rural location 50 km west. The measurement methodology was the same in both scenarios. The results from the spectrum measurements performed in the various scenarios have been analyzed and conclusions have been drawn.Item MIMO performance of the next generation DVB-T(2009) Atanes, P.; Arrinda, A.; Prieto, G.; Angueira, P.; Vélez, M. M.; Prieto, P.; POWERTRAINThis paper analyses the performance of a DTT (Digital Terrestrial Television) broadcasting system that includes MIMO-OFDM techniques. The benefits of these techniques are studied comparing the results for different MIMO 2×2 (Multiple Input Multiple Output), MISO 2×1 (Multiple Input Single Output) and SISO (Single Input Single Output) system configurations. Different propagation channel models and configurations are considered for each diversity scheme. This study has been carried out in the context of development of the next generation DVB-T, called DVB-T2.