21 search results - page 3 / 5 » Beacon-assisted spectrum access with cooperative cognitive t... |
WIOPT
2010
IEEE
13 years 6 months ago
2010
IEEE
Abstract—Development of dynamic spectrum access and allocation techniques recently have made feasible the vision of cognitive radio systems. However, a fundamental question arise...
INFOCOM
2010
IEEE
13 years 6 months ago
2010
IEEE
—We venture beyond the “listen-before-talk” strategy that is common in many traditional cognitive radio access schemes. We exploit the bi-directional nature of most primary c...
CDC
2008
IEEE
14 years 2 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...
JSAC
2011
13 years 2 months ago
2011
This work on cognitive radio access ventures beyond the more traditional “listen-before-talk” paradigm that underlies many cognitive radio access proposals. We exploit the bi-...
MOBICOM
2009
ACM
14 years 2 months ago
2009
ACM
Cognitive relays form a special cooperation relationship among users in cognitive radio networks, and help increase the transmission rates of both primary users and secondary user...