369 search results - page 6 / 74 » A Distributed Opportunistic Access Scheme for OFDMA Systems |
104
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NTMS
2009
IEEE
15 years 4 months ago
2009
IEEE
—Inter-cell interference (ICI) mitigation is always a big challenge issue in cellular systems. In this work we propose an Enhanced Fractional Frequency Reuse (EFFR) scheme combin...
ICASSP
2011
IEEE
14 years 1 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
2007
IEEE
15 years 3 months ago
2007
IEEE
— We address the problem of radio resource allocation in the Downlink (DL) of a cellular system with Relay Stations (RS), based on Orthogonal Frequency Division Multiple Access (...
VTC
2007
IEEE
15 years 3 months ago
2007
IEEE
The currently emerging 802.16e (WiMax) and 3GPP Long Term Evolution (LTE) cellular systems are based on Orthogonal Frequency Division Multiple Access (OFDMA). As OFDMA is basicall...
67
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IWCMC
2006
ACM
15 years 3 months ago
2006
ACM
The employment of the OFDMA transmission technique in broadband radio systems shows several benefits. Especially the exploitation of multi-user diversity with the help of sophisti...