148 search results - page 20 / 30 » Spectrum Sensing in Wideband OFDM Cognitive Radios |
PIMRC
2008
IEEE
14 years 2 months ago
2008
IEEE
— One of the main task to be done by a cognitive receiver is to sense its spectral environment in order to distinguish surrounding systems from each others. Actually most systems...
ICASSP
2011
IEEE
13 years 5 days ago
2011
IEEE
Successful spectrum sharing in a cognitive radio network depends on the correct and quick detection of primary activity. Cooperative spectrum sensing is therefore suggested to enh...
INFOCOM
2011
IEEE
12 years 12 months ago
2011
IEEE
Abstract—Market-based mechanisms offer promising approaches for spectrum access in cognitive radio networks. In this paper, we focus on two market models, one with a monopoly pri...
GLOBECOM
2009
IEEE
14 years 3 months ago
2009
IEEE
—In this paper, we model and analyze the interactions between secondary users in a spectrum overlay cognitive system as a cognitive MAC game. In this game, each secondary user ca...
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...