1600 search results - page 20 / 320 » Clustering for opportunistic communication |
VTC
2008
IEEE
15 years 3 months 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...
ICC
2007
IEEE
15 years 3 months 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...
AICT
2005
IEEE
15 years 3 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...
84
Voted
INFOCOM
2003
IEEE
15 years 2 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...
GLOBECOM
2007
IEEE
15 years 1 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...