75 search results - page 3 / 15 » A Cognitive Transmission Scheme with the Best Relay Selectio... |
ICASSP
2009
IEEE
14 years 29 days ago
2009
IEEE
One of the major challenges to cognitive radios is the synchronization of distributed radios onto the same spectrum white spaces which vary in time and space. In this paper, we pr...
ICC
2009
IEEE
14 years 29 days ago
2009
IEEE
— Spectrum handoff occurs when the primary users appear in the licensed band occupied by the secondary users. Spectrum handoff procedures aim to help the secondary users to vacat...
ICIP
2008
IEEE
14 years 8 months ago
2008
IEEE
Due to the dynamic nature of cognitive radio networks, multi-user video streaming (with various video traffic characteristics and QoS requirements) requires efficient dynamic chan...
JSAC
2011
13 years 1 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...
ICC
2007
IEEE
14 years 17 days ago
2007
IEEE
Abstract— Cooperation is increasingly regarded as a key technology for tackling the challenges of a practical implementation of cognitive radio. In this paper, we first give a b...