36 search results - page 7 / 8 » Optimal beamforming in cognitive two-way relay networks |
INFOCOM
2010
IEEE
13 years 3 months ago
2010
IEEE
—Cognitive Radio Networks (CRNs) have recently emerged as a promising technology to improve spectrum utilization by allowing secondary users to dynamically access idle primary ch...
GLOBECOM
2009
IEEE
14 years 2 days ago
2009
IEEE
Abstract— Two driving goals for cognitive radio (CR) technique are maximizing spectrum utilization and avoiding interference to primary users. In this paper, we deal with the CR ...
TWC
2008
13 years 5 months ago
2008
Node cooperation is an emerging and powerful solution that can overcome the limitation of wireless systems as well as improve the capacity of the next generation wireless networks....
TWC
2010
13 years 15 hour ago
2010
In cognitive radio networks, a cognitive source node requires two essential phases to complete a cognitive transmission process: the phase of spectrum sensing with a certain time d...
INFOCOM
2010
IEEE
13 years 3 months ago
2010
IEEE
—Much research has been devoted to maximize the life time of mobile ad-hoc networks. Life time has often been defined as the time elapsed until the first node is out of battery...