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Robust Transceiver Design for Multiuser MIMO Downlink with Channel Uncertainties
Wei MIAO Yunzhou LI Xiang CHEN Shidong ZHOU Jing WANG
Publication
IEICE TRANSACTIONS on Communications
Vol.E91-B
No.10
pp.3351-3354 Publication Date: 2008/10/01 Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e91-b.10.3351 Print ISSN: 0916-8516 Type of Manuscript: LETTER Category: Wireless Communication Technologies Keyword: multiuser MIMO, downlink, transceiver, robust design,
Full Text: PDF>>
Summary:
This letter addresses the problem of robust transceiver design for the multiuser multiple-input-multiple-output (MIMO) downlink where the channel state information at the base station (BS) is imperfect. A stochastic approach which minimizes the expectation of the total mean square error (MSE) of the downlink conditioned on the channel estimates under a total transmit power constraint is adopted. The iterative algorithm reported in [2] is improved to handle the proposed robust optimization problem. Simulation results show that our proposed robust scheme effectively reduces the performance loss due to channel uncertainties and outperforms existing methods, especially when the channel errors of the users are different.
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