193 search results - page 34 / 39 » Dynamic spectrum access policies for cognitive radio |
JSAC
2008
13 years 7 months ago
2008
A cognitive radio can sense its environment and adapt some of its features, such as carrier frequency, transmission bandwidth, transmission power, and modulation, thus allowing dyn...
VTC
2010
IEEE
13 years 5 months ago
2010
IEEE
Cognitive radios are devices capable of sensing a large range of frequencies in order to detect the presence of primary networks and reuse their bands when they are not occupied. D...
TSP
2008
13 years 7 months ago
2008
The problem of opportunistic access of parallel channels occupied by primary users is considered. Under a continuous-time Markov chain modeling of the channel occupancy by the prim...
TWC
2008
13 years 7 months ago
2008
We consider a multi-channel opportunistic communication system where the states of these channels evolve as independent and statistically identical Markov chains (the Gilbert-Elli...
TMC
2011
13 years 2 months ago
2011
We consider the problem of optimal channel access to provide quality of service (QoS) for data transmission in cognitive vehicular networks. In such a network the vehicular nodes ...