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Limited Feedback Precoding Scheme for Downlink Multiuser MIMO Systems
Haibo ZHENG Yongle WU Yunzhou LI Shidong ZHOU Jing WANG
IEICE TRANSACTIONS on Communications
Publication Date: 2007/03/01
Online ISSN: 1745-1345
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
limited feedback, multiuser MIMO, grassmannian beamforming, user selection,
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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.