159 search results - page 14 / 32 » Optimization of OFDMA-Based Cellular Cognitive Radio Network... |
WCNC
2008
IEEE
14 years 2 months ago
2008
IEEE
—In this paper, a wireless cognitive radio sensor network is considered, where each sensor node is equipped with cognitive radio and the network is a multi-carrier system operati...
TWC
2008
13 years 7 months ago
2008
A resource allocation framework is presented for spectrum underlay in cognitive radio networks. We consider both interference constraints for primary users and quality of service (...
MOBICOM
2009
ACM
14 years 2 months ago
2009
ACM
In cognitive radio networks (CRNs), spectrum sensing is key to opportunistic spectrum access while preventing any unacceptable interference to primary users’ communications. Alt...
INFOCOM
2008
IEEE
14 years 2 months ago
2008
IEEE
—We develop opportunistic scheduling policies for cognitive radio networks that maximize the throughput utility of the secondary (unlicensed) users subject to maximum collision c...
GLOBECOM
2009
IEEE
14 years 2 months ago
2009
IEEE
Abstract—Recent studies have been conducted to indicate the ineffective usage of licensed bands due to the static spectrum allocation. In order to improve the spectrum utilizatio...