Sciweavers

Share
GLOBECOM
2007
IEEE

Cooperative Spectrum Sensing and Detection for Cognitive Radio

9 years 16 days ago
Cooperative Spectrum Sensing and Detection for Cognitive Radio
—One of the main requirements of cognitive radio systems is the ability to reliably detect the presence of licensed primary transmissions. Previous works on the problem of detection for cognitive radio have suggested the necessity of user cooperation in order to be able to detect at the really low signalto-noise ratios experienced in practical situations. We consider a system of cognitive radio users who cooperate with each other in trying to detect licensed transmissions. Assuming that the cooperating nodes use identical energy detectors, we model the received signals as correlated log-normal random variables and study the problem of fusing the decisions made by the individual nodes. We design a linear-quadratic (LQ) fusion strategy based on a deflection criterion for this problem, that takes into account the correlation between the nodes. Our simulation results show that the LQ detector significantly outperforms the counting rule, which is the fusion rule that is obtained by igno...
Jayakrishnan Unnikrishnan, Venugopal V. Veeravalli
Added 02 Jun 2010
Updated 02 Jun 2010
Type Conference
Year 2007
Where GLOBECOM
Authors Jayakrishnan Unnikrishnan, Venugopal V. Veeravalli
Comments (0)
books