Beamforming and user selection in SDMA systems utilizing channel statistics and instantaneous SNR feedback
2007 (English)In: 2007 IEEE International Conference on Acoustics, Speech, and Signal Processing, IEEE , 2007, 113-116 p.Conference paper (Refereed)
Spatial division multiple access (SDMA) systems efficiently take advantage of the spatial dimensions of the channel to increase the performance of the system. A major difficulty, common to all SDMA systems, is the requirement of channel knowledge at the transmitter to enable transmission of multiple streams without catastrophic interference. Herein we show that, in wide area scenarios, statistical channel information combined with the Euclidean norm of the channel realization, fed back from the users, provide sufficient information for SDMA systems to efficiently allocate users in time and space. A joint beamforming and scheduling algorithm is proposed for the downlink, which extends the proportional fair scheduling criterion to an SDMA setting, resulting in a weighted sum rate maximization.
Place, publisher, year, edition, pages
IEEE , 2007. 113-116 p.
, International Conference on Acoustics Speech and Signal Processing (ICASSP), ISSN 1520-6149
spatial division multiple access, array signal processing, mobile communicationfeedback
IdentifiersURN: urn:nbn:se:kth:diva-34953DOI: 10.1109/ICASSP.2007.366485ISI: 000248906600029ScopusID: 2-s2.0-34547524313OAI: oai:DiVA.org:kth-34953DiVA: diva2:427403
32nd IEEE International Conference on Acoustics, Speech and Signal Processing Honolulu, HI, APR 15-20, 2007
QC 201106282011-06-282011-06-172012-01-23Bibliographically approved