332 search results - page 20 / 67 » Opportunistic Spectrum Access in Cognitive Radio Networks |
CORR
2007
Springer
14 years 9 months ago
2007
Springer
—Opportunistic secondary spectrum usage has the potential to dramatically increase spectral efficiency and rates of a network of secondary cognitive users. In this work we consi...
TWC
2011
14 years 4 months ago
2011
In cognitive radio networks, each cognitive transmission process typically requires two phases: the spectrum sensing phase and data transmission phase. In this paper, we investiga...
69
Voted
ICASSP
2010
IEEE
14 years 9 months ago
2010
IEEE
Vast segments of the frequency spectrum are licensed to specific users for particular applications. These legacy users, however, often under-utilize their designated spectrum seg...
ICASSP
2011
IEEE
14 years 1 months ago
2011
IEEE
Abstract—Temporal Dynamic Spectrum Access (DSA) in Cognitive Radio Networks exploits time gaps between the primary users transmissions. In this work, the fundamental performance ...
INFOCOM
2009
IEEE
15 years 4 months ago
2009
IEEE
—In cognitive wireless networks where secondary users (SUs) opportunistically access spectral white spaces of primary users (PUs), there exists an inherent tradeoff between sensi...