Abstract:
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Spectrum models play a key role in the research of
Dynamic Spectrum Access/Cognitive Radio (DSA/CR) systems.
Models existing to date are able to characterise the statistical
properties of spectrum occupancy in only one of its dimensions
(time, frequency or space). However, to the best of the authors’
knowledge, there is no model capable to account for the properties
of spectrum occupancy in all its dimensions simultaneously. Since
the development of a single model to characterise spectrum
occupancy in such a holistic manner constitutes an extremely
challenging task, this work explores an alternative based on the
combination of existing dimension-specific models into a unified
modelling approach. In particular, a framework is proposed for
the integration of spectrum models that have been designed
independently for a specific dimension of spectrum occupancy
(time, frequency or space), thus enabling the multidimensional
modelling of spectrum occupancy. A sophisticated simulation tool
implementing state-of-the-art time, frequency and space dimension
models is developed according to the proposed framework
and used to generate synthetic spectrum data that simultaneously
accounts for the properties of spectrum occupancy in all its
dimensions. The use of such modelling framework in the contextof the simulation of DSA/CR systems is illustrated as well. |