170 search results - page 17 / 34 » Cognitive Transmissions with Multiple Relays in Cognitive Ra... |
PIMRC
2010
IEEE
14 years 7 months ago
2010
IEEE
We propose an opportunistic channel access scheme for cognitive radio-enabled secondary networks. In our work, we model the channel occupancy due to Primary User (PU) activity as a...
GLOBECOM
2010
IEEE
14 years 7 months ago
2010
IEEE
With the employment of cognitive radio technology, dynamic spectrum management has the potential to solve the underused spectrum problem. In this paper, we introduce and compare tw...
TWC
2010
14 years 4 months ago
2010
In this paper, cooperative transmission protocols are proposed for wireless broadcast channels, a fundamental building block of wireless communication networks. The concepts of co...
JSAC
2011
14 years 4 months ago
2011
—We analyze the multihop delay of ad hoc cognitive radio networks, where the transmission delay of each hop consists of the propagation delay and the waiting time for the availab...
WCNC
2008
IEEE
15 years 3 months ago
2008
IEEE
—We study a cognitive network consisting of multiple cognitive users communicating in the presence of a single primary user. The primary user is located at the center of the netw...