DocumentCode
1525443
Title
Common Rate Support in Multi-Antenna Downlink Channels Using Semi-Orthogonal User Selection
Author
Yoo, Taesang ; Foschini, Gerard J. ; Valenzuela, Reinaldo A. ; Goldsmith, Andrea J.
Author_Institution
Corp. R&D, Qualcomm Inc., San Diego, CA, USA
Volume
57
Issue
6
fYear
2011
fDate
6/1/2011 12:00:00 AM
Firstpage
3449
Lastpage
3461
Abstract
We consider a flat fading multiantenna downlink system with a large number of users where the objective is to deliver equal rates to nonoutage users with a low complexity. We show that in the limit of a large number of users, a zero-forcing beamforming strategy combined with a low complexity user grouping algorithm based on a semi-orthogonal user selection achieves asymptotically optimal performance, with respect to an upper bound that can be achieved when no interference is present among users.
Keywords
computational complexity; fading channels; common rate support; flat fading multiantenna downlink system; low complexity user grouping algorithm; multiantenna downlink channels; semiorthogonal user selection; zero-forcing beamforming strategy; Array signal processing; Bandwidth; Complexity theory; Downlink; Fading; Interference; Upper bound; MIMO downlink; multi-user diversity; semi-orthogonal user selection; zero-forcing beamforming;
fLanguage
English
Journal_Title
Information Theory, IEEE Transactions on
Publisher
ieee
ISSN
0018-9448
Type
jour
DOI
10.1109/TIT.2011.2143810
Filename
5773070
Link To Document