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This 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...
Updated reference indoor radio noise values in the medium wave band are provided. The results are based on an extensive trial: 339 locations in buildings located in two cities in the north of Spain gathering data at frequencies of 630, 675, 1035, 1242, and 1620 kHz. The increase in absolute noise levels as well as location variability values has been found significant if they are compared to values...
This paper presents a comparison study between carrier to noise (C/N) values measured outdoors and indoors in five office buildings of a city in Spain, related to radio broadcasted signals. Measurements were carried out in Bilbao at three frequencies in the medium wave band: 639 kHz, 990 kHz and 1305 kHz. Results show that outdoor mean C/N results are 7.5 dB higher than indoors for 639 kHz and 6.5...
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