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108
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GLOBECOM
2007
IEEE
15 years 6 months ago
2007
IEEE
We consider a cognitive radio system where the secondary transmitter varies its transmit power based on all the information available from the spectrum sensor. The operation of th...
126
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INFOCOM
2011
IEEE
14 years 3 months ago
2011
IEEE
—Cognitive radios (CRs) can mitigate the impending spectrum scarcity problem by utilizing their capability of accessing licensed spectrum bands opportunistically. While most exis...
CDC
2008
IEEE
15 years 6 months ago
2008
IEEE
—We study the problem of dynamic spectrum sensing and access in cognitive radio systems as a partially observed Markov decision process (POMDP). A group of cognitive users cooper...
CISS
2008
IEEE
15 years 6 months ago
2008
IEEE
—One of the major concerns of cognitive radios when used for secondary spectrum access is the potential of interfering primary users, considering especially that cognitive radios...
106
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ICASSP
2008
IEEE
15 years 6 months ago
2008
IEEE
A parallel structure to do spectrum sensing in Cognitive Radio (CR) at sub-Nyquist rate is proposed. The structure is based on Compressed Sensing (CS) that exploits the sparsity o...