169 search results - page 25 / 34 » Opportunistic spectrum access for mobile cognitive radios |
GLOBECOM
2010
IEEE
13 years 5 months ago
2010
IEEE
Abstract--Wireless networks, especially mobile ad hoc networks (MANET) and cognitive radio networks (CRN), are facing two new challenges beyond traditional random network model: op...
ICASSP
2011
IEEE
12 years 11 months ago
2011
IEEE
In Cognitive Radio (CR) systems, spectrum sensing plays a key role to determine the free frequency bands. However, when the primaryuser (PU) signal spectrum exhibits localized fad...
VTC
2006
IEEE
14 years 1 months ago
2006
IEEE
— In this paper, we evaluate a cognitive radio transceiver employing both non-contiguous multicarrier modulation (NC-MCM) and adaptive bit allocation. Although NCMCM and bit allo...
ICASSP
2011
IEEE
12 years 11 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
2006
IEEE
14 years 1 months ago
2006
IEEE
— Opportunistic spectrum access and adaptive power management are effective techniques to improve throughput, delay performance, and energy efficiency for wireless networks. In ...