Distributed Precoding with Limited Interference Leakage for MU-MIMO System

Weidong WANG  Gaofeng CUI  Sixing LU  Yinghai ZHANG  

Publication
IEICE TRANSACTIONS on Communications   Vol.E94-B   No.12   pp.3391-3394
Publication Date: 2011/12/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.3391
Print ISSN: 0916-8516
Type of Manuscript: Special Section LETTER (Special Section on Cooperative Communications for Cellular Networks)
Category: 
Keyword: 
network MIMO,  max-SLNR,  distributed precoding,  

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Summary: 
The capacity of Multiple-Input Multiple-Output networks (MIMO) is seriously degraded by interference. Many solutions have been given to overcome this problem, such as network MIMO and maximum signal to leakage plus noise ratio (max-SLNR). In this letter, a downlink distributed precoding method is proposed to nullify the intra-cell interference and mitigate the negative effect on other cell users. This method can keep the merits of network MIMO and max-SLNR while overcoming their shortcomings. Numerical results show that the proposed precoding method outperforms Block Diagonalization (BD), max-SLNR and Block Diagonalization with Other Cell Interference (BD-OCI).