Paper Info
Title
Variable-rate adaptive modulation in MIMO systems exploiting multiuser diversity
Abstract
An adaptive modulation technique for multiuser MIMO systems with multiuser diversity is proposed. This technique maximizes the sum of the instantaneous bit rate under a target BER constraint by feeding back sub-channel SNRs only. By generating a random transmit beamforming matrix with a water-filling configuration, each user estimates and feeds back the effective SNRs for its sub-channels. With each user's sub-channel SNRs, the transmitter then schedules the transmission to a particular one selected by a proportional fair scheduling algorithm. Finally, adaptive modulation is applied to each sub-channel of the selected user based on the BER constraint. Simulation results show that the throughput of the proposed method converges to that of eigen-beamforming when the number of users in a cell is large.
Year
DOI
Venue
2004
10.1109/ICASSP.2004.1326921
ICASSP (4)
Keywords
Field
DocType
random transmit beamforming matrix,optimisation,multiuser channels,diversity reception,ber constraint,subchannel snr,scheduling,eigen-beamforming,parameter estimation,matrix algebra,instantaneous bit rate,proportional fair scheduling,multiuser diversity,variable-rate adaptive modulation,adaptive modulation,water-filling configuration,throughput,error statistics,mimo systems,bit error rate,mimo,transmitters,bandwidth,fading,scattering,base stations,constellation diagram,variable rate
Link adaptation,Transmitter,Beamforming,Mathematical optimization,Computer science,Scheduling (computing),Algorithm,Real-time computing,Schedule,Throughput,Estimation theory,Proportionally fair
Conference
Volume
ISSN
ISBN
4
1520-6149
0-7803-8484-9
Citations 
PageRank 
References 
0
0.34
6
Authors
3
Name
Order
Citations
PageRank
Lan Tang11510.66
Shuxun Wang2318.61
Liang Ying-Chang310007593.03