156 search results - page 23 / 32 » Opportunistic Spectrum Access for Energy-Constrained Cogniti... |
DSD
2010
IEEE
14 years 7 months ago
2010
IEEE
Orthogonal Frequency Division Multiplexing (OFDM) can provide a flexible usage of the spectrum by controlling individual subcarriers. Sets of subcarriers can be zero-modulated to a...
74
Voted
GLOBECOM
2008
IEEE
15 years 4 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...
MASS
2010
14 years 7 months ago
2010
Cognitive radio, which enables dynamic access of under-utilized licensed spectrums, is a promising technology for more efficient spectrum utilization. Since cognitive radio enables...
MOBICOM
2009
ACM
15 years 4 months ago
2009
ACM
Cognitive relays form a special cooperation relationship among users in cognitive radio networks, and help increase the transmission rates of both primary users and secondary user...
CISS
2008
IEEE
15 years 4 months ago
2008
IEEE
Abstract— According to the cognitive radio paradigm, a terminal or subsystem will opportunistically select a frequency band for data transmission. Because the spectrum is shared,...