SHERP

Enhanced Unitary Beamforming Scheme for Limited-Feedback Multiuser MIMO Systems

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Authors
Lee, Wonmu; Sohn, Illsoo; Lee, Byong Ok; Lee, Kwang Bok
Issue Date
2008-10
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
IEEE Commun. Lett., vol. 12, no. 10, pp. 758-760, Oct. 2008
Keywords
MIMOdownlinkbroadcast channelunitarylimited feedback
Description
Manuscript received July 1, 2008. The associate editor coordinating the
review of this letter and approving it for publication was R. Blum.

The authors are with the School of Electrical Engineering and INMC, Seoul
National University (SNU), Seoul, Korea (e-mail: sohnis@mobile.snu.ac.kr).
Abstract
In this letter, we consider practical downlink multiuser
multiple-input multiple-output systems where each user
has multiple antennas and codebook-based limited channel feedback
is available at base station. We propose a preprocessing
scheme for downlink transmission where a unitary beamforming
matrix is used. Firstly, we propose how to construct the
unitary matrix that maximizes sum rate. Secondly, we propose
a codebook-based channel feedback method for the proposed
beamforming method. Numerical results show that the proposed
scheme outperforms conventional zero-forcing beamforming
scheme in terms of sum rate.
ISSN
1089-7798
Language
English
URI
http://hdl.handle.net/10371/7484
DOI
https://doi.org/10.1109/LCOMM.2008.081019
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Computer Science and Engineering (컴퓨터공학부)Journal Papers (저널논문_컴퓨터공학부)
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