369 search results - page 4 / 74 » A Distributed Opportunistic Access Scheme for OFDMA Systems |
ICC
2007
IEEE
14 years 4 months ago
2007
IEEE
—Opportunistic scheduling in random beamforming maximizes the sum-rate by allocating resources to the users with the best channel condition, thus leveraging on multiuser diversit...
ICC
2007
IEEE
14 years 4 months ago
2007
IEEE
— In orthogonal frequency-division multiplex access (OFDMA) systems, including uplink and downlink, the carrierfrequency offset (CFO) between the multiple transceivers introduces...
CORR
2010
Springer
13 years 10 months ago
2010
Springer
Adaptive orthogonal frequency division multiple access (OFDMA) has recently been recognized as a promising technique for providing high spectral efficiency in future broadband wire...
TON
2012
12 years 7 days ago
2012
—Cognitive Radio (CR) technology has great potential to alleviate spectrum scarcity in wireless communications. It allows secondary users (SUs) to opportunistically access spectr...
SIGCOMM
2010
ACM
13 years 10 months ago
2010
ACM
We describe an opportunistic channel access scheme for cognitive radio-enabled secondary nodes (SNs). The proposed scheme uses the residual channel idle time distribution to estim...