1600 search results - page 20 / 320 » Clustering for opportunistic communication |
134
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VTC
2008
IEEE
16 years 12 days ago
2008
IEEE
—In this paper we present a study on pilot aided time and frequency synchronization for Opportunistic Radio (OR) OFDM systems which apply adaptive subcarrier allocation technique...
137
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ICC
2007
IEEE
16 years 11 days ago
2007
IEEE
Abstract— This paper proposes the opportunistic power allocation (OPA) scheme for random beamforming with a limited feedback rate. Without the channel state information, the prop...
147
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AICT
2005
IEEE
15 years 11 months ago
2005
IEEE
Integration of different radio access networks will become a reality in a near future. Our interworking architecture assumes a ubiquitous primary network (the cellular one) and se...
182
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INFOCOM
2003
IEEE
15 years 11 months ago
2003
IEEE
Abstract— Emerging spread spectrum high-speed data networks utilize multiple channels via orthogonal codes or frequency-hopping patterns such that multiple users can transmit con...
177
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GLOBECOM
2007
IEEE
15 years 10 months ago
2007
IEEE
We design opportunistic spectrum access strategies for improving spectrum efficiency. In each slot, a secondary user chooses a subset of channels to sense and decides whether to ac...