2354 search results - page 34 / 471 » Radio number for trees |
ICC
2009
IEEE
15 years 4 months ago
2009
IEEE
Abstract—Based on information theoretic tools, a new spectrum sensing method is proposed in this paper to detect vacant sub-bands in the radio spectrum1 . Specifically, based on...
MOBICOM
2009
ACM
15 years 4 months ago
2009
ACM
We address the connectivity of large-scale ad hoc cognitive radio networks, where secondary users exploit channels temporarily and locally unused by primary users and the existenc...
CDC
2008
IEEE
15 years 4 months ago
2008
IEEE
— We study the problem of pricing uplink power in wide-band cognitive radio networks under the objective of revenue maximization for the service provider and while ensuring incen...
ICC
2007
IEEE
15 years 4 months ago
2007
IEEE
— This paper describes a combined modulation scheme for time hopping ultra wideband (TH-UWB) radio systems using on-off keying (OOK) and pulse shape modulation (PSM). For this sc...
ICC
2007
IEEE
15 years 4 months ago
2007
IEEE
— We consider a cognitive radio system like the future 802.22 networks where license-exempt service providers (SPs) will share a fixed spectrum in a non-interference basis to ea...