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Limited Feedback Precoding Scheme for Downlink Multiuser MIMO Systems
Haibo ZHENG Yongle WU Yunzhou LI Shidong ZHOU Jing WANG
Publication
IEICE TRANSACTIONS on Communications
Vol.E90-B
No.3
pp.689-692 Publication Date: 2007/03/01 Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.3.689 Print ISSN: 0916-8516 Type of Manuscript: LETTER Category: Wireless Communication Technologies Keyword: limited feedback, multiuser MIMO, grassmannian beamforming, user selection,
Full Text: PDF(157.9KB)>>
Summary:
In this letter, we propose a limited feedback precoding scheme based upon grassmannian beamforming and user selection for downlink multiuser MIMO systems. Conventional random beamforming scheme only enjoys significant performance gains with a large number of users, which limits its practical application. With proper codebook size the proposed scheme outperforms conventional random beamforming scheme when the number of users is small or moderate.
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