Enhanced Lattice-Reduction Precoding Using List Quantizer for Multi-Antenna Multi-User Communication

Sooyoung HUR  Namshik KIM  Hyuncheol PARK  Joonhyuk KANG  

Publication
IEICE TRANSACTIONS on Communications   Vol.E91-B    No.1    pp.351-354
Publication Date: 2008/01/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e91-b.1.351
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
Keyword: 
broadcast precoding,  lattice-reduction,  multiuser MIMO,  

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Summary: 
Based on an analysis of the error patterns in lattice-reduction (LR) precoding in a multiple-antenna broadcast channel, this paper proposes a simple precoding technique that can reduce the quantization error. The proposed scheme establishes a lattice list to provide more candidates for transmission power reduction based on the analysis of the patterns of the error in the LR precoding method [9]. Simulation results show that the proposed scheme matches the BER performance of more complex precedents (such as the vector perturbation using sphere encoding) with significant saving in complexity.