Joint Transceiver Optimization for Multiuser MIMO Amplify-and-Forward Relay Broadcast Systems

Jun LIU  Xiong ZHANG  Zhengding QIU  

IEICE TRANSACTIONS on Communications   Vol.E95-B   No.4   pp.1443-1447
Publication Date: 2012/04/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E95.B.1443
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
multiuser MIMO,  relay,  transceiver,  sum-MSE,  sum-rate,  

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This letter considers a dual-hop multiuser MIMO amplify-and-forward relay broadcast system with multi-antenna nodes. A unified scheme is addressed to jointly optimize the linear transceiver based on the sum mean-square error (MSE) and the sum rate criterion. The solutions are iteratively obtained by deriving the gradients of the objective functions for a gradient descent algorithm. Simulation results demonstrate the performance improvements in terms of the BER and the sum rate.