148 search results - page 14 / 30 » Spectrum Sensing in Wideband OFDM Cognitive Radios |
VTC
2008
IEEE
14 years 2 months ago
2008
IEEE
This paper considers a scenario in which a secondary user makes opportunistic use of a channel allocated to some primary network. The primary network operates in a time-slotted ma...
JSAC
2011
13 years 3 months ago
2011
—We consider a wireless cognitive radio network in which a set of secondary users (SUs) opportunistically utilize the wireless spectrum licensed to the primary users (PUs) to tra...
GLOBECOM
2010
IEEE
13 years 6 months ago
2010
IEEE
This paper investigates how to characterize the effect of multiple spectrum handoff delay on the extended data delivery time of the secondary users' connections in cognitive r...
ICC
2008
IEEE
14 years 2 months ago
2008
IEEE
—Cognitive radio (CR) dynamically accessing inactive radio spectrum of the primary system (PS) at link level has attracted a lot of research interests. The cognitive radio networ...
VTC
2010
IEEE
13 years 6 months ago
2010
IEEE
— We consider the sensing of the frequency spectrum based on energy detection for cognitive radios. It has been shown that the reliability of the sensing can be improved by using...