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Enhanced Lattice-Reduction Precoding Using List Quantizer for Multi-Antenna Multi-User Communication
Sooyoung HUR Namshik KIM Hyuncheol PARK Joonhyuk KANG
IEICE TRANSACTIONS on Communications
Publication Date: 2008/01/01
Online ISSN: 1745-1345
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
broadcast precoding, lattice-reduction, multiuser MIMO,
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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 . 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.