Most of the spectrum occupancy measurement campaigns
performed to the date in the context of cognitive radio
are based on measurements in outdoor high points such as building
roofs, balconies and towers. Although these measurement
scenarios enable a more accurate estimation of the primary
transmitters’ spectral activity, they may not be representative
of the spectrum occupancy perceived by a cognitive radio user
in many other interesting practical situations where users are not
placed in a static high point. In this context, this work presents
the results obtained in a spectrum measurement campaign
performed over a rich diversity of measurement scenarios of
practical interest. The considered scenarios include not only high
points but also indoor environments as well as outdoor locations
at the ground level in open areas and between buildings. The
variety of considered measurement scenarios provides a broader
view and understanding of dynamic spectrum occupancy under
different practical scenarios of interest. The impact of considering
various locations on the spectral activity perceived by a cognitive
radio user is determined, analyzed and quantified. Moreover, a
theoretical model for the occupancy levels observed at different
locations is developed and verified with the obtained results.
CitationLópez, M.; Casadevall, F. Spectrum occupancy in realistic scenarios and duty cycle model for cognitive radio. "Advances in Electronics and Telecommunications, Special Issue on Radio Communication Series: Recent Advances and Future Trends in Wireless Communication", Abril 2010, vol. 1, núm. 1, p. 1-9.
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