Title :
Uplink scheduling in OFDMA systems using opportunistic beamforming
Author :
Yaacoub, Elias ; Yaacoub, Charles
Author_Institution :
Dept. of Electr. & Comput. Eng., American Univ. of Beirut, Beirut, Lebanon
Abstract :
Opportunistic beamforming is investigated in OFDMA uplink. A low complexity scheduling algorithm for utility maximization with opportunistic beamforming is presented. Scheduling with greedy and proportional fair utilities is studied. A beam is formed in a pseudorandom fashion thus leading to artificial fading variations. This allows users to opportunistically benefit from the antenna gain. Results show improved throughput and fairness in the case of opportunistic beamforming even when only a single beam is used.
Keywords :
OFDM modulation; array signal processing; frequency division multiple access; scheduling; OFDMA systems; OFDMA uplink; antenna gain; artificial fading variations; complexity scheduling algorithm; greedy fair utilities; opportunistic beamforming; proportional fair utilities; pseudorandom fashion; uplink scheduling; Antenna arrays; Array signal processing; Diversity methods; Fading; Fluctuations; Rayleigh channels; Resource management; Scheduling algorithm; Signal to noise ratio; Transmitting antennas; OFDMA; antenna arrays; opportunistic beamforming; resource allocation; scheduling; uplink;
Conference_Titel :
Wireless Days (WD), 2009 2nd IFIP
Conference_Location :
Paris
Print_ISBN :
978-1-4244-5660-4
Electronic_ISBN :
978-1-4244-5662-8
DOI :
10.1109/WD.2009.5449685
