Joint MMSE Vector Precoding Based on GMD Method for MIMO Systems

Feng LIU  Ling-ge JIANG  Chen HE  

Publication
IEICE TRANSACTIONS on Communications   Vol.E90-B   No.9   pp.2617-2620
Publication Date: 2007/09/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e90-b.9.2617
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
vector precoding,  MMSE,  GMD method,  MIMO systems,  

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Summary: 
We propose a geometric mean decomposition (GMD) based vector precoding (VP) for multiple input multiple output (MIMO) systems. Minimum mean square error (MMSE) criterion is used for the joint VP design. The application of GMD method eliminates the imbalance among subchannel gains and obtains a better perturbation vector than the conventional method. We then exploit the extended channel matrix for further performance improvement. Simulation results show the proposed schemes significantly outperform the existing VP schemes.