Joint Linear MMSE Processing for Closed-Loop Multi-User Non-regenerative MIMO-Relay Systems

Gen LI  Ying WANG  Tong WU  Ping ZHANG  

IEICE TRANSACTIONS on Communications   Vol.E94-B   No.3   pp.838-840
Publication Date: 2011/03/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.838
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
MIMO relay,  linear processing,  multiuser,  MSE,  

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This letter addresses linear processing issues for the downlink of closed-loop multi-user non-regenerative MIMO-relay systems with arbitrary number of antennas at each node. First three precoding design schemes at BS are presented. Then given the fixed BS linear processing matrix, we propose a joint iterative linear processing scheme for the relay station and mobile stations, aiming to minimize the total mean squared error (MSE). Finally Simulation results are provided to show the performance gain of joint linear processing at the multi-antenna nodes.