70 search results - page 6 / 14 » Energy-aware adaptive OFDM systems |
TWC
2008
13 years 7 months ago
2008
Orthogonal frequency division multiplexing based wireless systems are spectrally efficient, but they are vulnerable to inter carrier interference (ICI). In a wide area scenario, us...
ICC
2007
IEEE
14 years 1 months ago
2007
IEEE
—OFDM-FDMA/SDMA is currently considered as the leading transmission strategy for the downlink of beyond 3G mobile radio systems. When channel state information is available at th...
ICC
2009
IEEE
13 years 5 months ago
2009
IEEE
In this paper, we propose a cross-layer design (CLD) scheme combining rate adaptation and four types of hybrid automatic repeat request (HARQ) for multiband orthogonal frequency di...
GLOBECOM
2008
IEEE
14 years 1 months ago
2008
IEEE
— An opportunistic radio is a radio able to detect the spectrum unused bands, and to adapt its transmission parameters in order to transmit within these free bands. An opportunis...
ICC
2007
IEEE
14 years 1 months ago
2007
IEEE