Title :
Performance of a Reduced Feedback OFDMA System Employing Joint Scheduling and Diversity
Author :
Hur, Seong-Ho Paul ; Rao, Bhaskar D.
Author_Institution :
Dept. of ECE, U.C. San Diego, La Jolla, CA, USA
Abstract :
We consider joint scheduling and diversity to enhance the benefits of multiuser diversity in a multiuser OFDMA scheduling system. The OFDMA spectrum is assumed to consist of NRB resource blocks and the reduced feedback scheme consists of each user feeding back only the best- NFB signal to noise ratios. Assuming maximum SNR scheduling, we develop a framework to analyze the performance of both adaptive and non-adaptive rate schemes for a general value of NFB. Based on this framework, we provide closed-form expressions for the sum rate and the bit error probability when transmit antenna selection is employed at the transmitter and maximal ratio combining is utilized at the receivers.
Keywords :
OFDM modulation; diversity reception; error statistics; feedback; frequency division multiple access; probability; radio receivers; radio transmitters; scheduling; transmitting antennas; OFDMA spectrum; SNR scheduling; adaptive rate scheme; bit error probability; closed-form expression; feedback scheme reduction; feeding back; maximal ratio combining; multiuser OFDMA scheduling system; multiuser diversity; nonadaptive rate scheme; radio receiver; radio transmitter; resource block; signal to noise ratio scheduling; transmit antenna selection; Diversity reception; Feedback amplifier; Joints; Receiving antennas; Signal to noise ratio; Transmitting antennas;
Conference_Titel :
Vehicular Technology Conference (VTC Spring), 2011 IEEE 73rd
Conference_Location :
Yokohama
Print_ISBN :
978-1-4244-8332-7
DOI :
10.1109/VETECS.2011.5956464
