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111
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INFOCOM
2012
IEEE
12 years 12 months ago
2012
IEEE
Cognitive radio (CR) techniques improve the spectrum utilization by exploiting temporarily-free frequency bands (i.e., in the time domain). The spectrum utilization can be boosted...
VTC
2010
IEEE
14 years 7 months ago
2010
IEEE
— We consider the sensing of the frequency spectrum based on energy detection for cognitive radios. It has been shown that the reliability of the sensing can be improved by using...
76
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MOBICOM
2009
ACM
15 years 4 months ago
2009
ACM
We address the connectivity of large-scale ad hoc cognitive radio networks, where secondary users exploit channels temporarily and locally unused by primary users and the existenc...
104
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GLOBECOM
2007
IEEE
15 years 3 months ago
2007
IEEE
— In this paper, we investigate the channel selection strategy for secondary users in cognitive radio networks. We claim that in order to avoid the costly channel switchings, a s...
ICASSP
2011
IEEE
14 years 1 months ago
2011
IEEE
Consider a robust downlink beamforming optimization problem for secondary multicast transmission in a multiple-input multiple-output (MIMO) spectrum sharing cognitive radio (CR) n...