Optimal beam subset and user selection for orthogonal random beamforming

The throughput performance of orthogonal random beamforming (ORBF) with a finite number of users is limited due to the increasing amount of residual interference. In this letter, we find the optimal beam subset, the optimal user set, and the optimal number of random beams to maximize the sum throughput of the ORBF. The proposed scheme provides the best trade-off between the multiplexing gain and the multiuser interference by the determination of the optimal number of random beams as well as the beam selection diversity gain due to the selection of the optimal beam subset. In addition, two efficient suboptimal schemes are presented to reduce the computational complexity and the feedback overhead of the optimal method.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2008-09
Language
ENG
Citation

IEEE COMMUNICATIONS LETTERS, v.12, pp.636 - 638

ISSN
1089-7798
DOI
10.1109/LCOMM.2008.080648
URI
http://hdl.handle.net/10203/12310
Appears in Collection
EE-Journal Papers(저널논문)
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