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Some of the future wireless networks are related to the provision of higher data rates and lower energy consumption. In contrast to the clear increasing spectrum demand, bandwidth is a limited resource. Cooperative diversity allows to increase the spectral efficiency and the reliability of the communication. However, in scenarios with high node density and high mobile data traffic volume the collaboration...
Cognitive radio systems can coexist with a primary network in a scanning-free region, which can be dimensioned by location awareness. This coexistence of networks improves the system throughput and increases the efficient use of radio spectrum. However, the accuracy of traditional positioning systems affects the correct dimensioning of the concurrent transmission region. In this paper the impact of...
Polarization diversity techniques have not received as much attention as others due to the significant difference in mean signal level between copolarized and cross-polarized branches when one polarization is transmitted. However, multiple-input-multiple-output (MIMO) systems where the multipath fading is only partially correlated could use polarization diversity to provide a high diversity gain....
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