A Low-Complexity Design of Linear Precoding for MIMO Channels with Finite-Alphabet Inputs
A Low-Complexity Design of Linear Precoding for MIMO Channels with Finite-Alphabet Inputs
复制标题
有限字母输入的 MIMO 信道线性预编码的低复杂度设计
DOI:
10.1109/wcl.2012.121411.110025
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发表时间:
2012-02
影响因子:
6.3
通讯作者:
Jianhua Lu
中科院分区:
文献类型:
--
作者:
Weiliang Zeng;Chengshan Xiao;Jianhua Lu
This paper investigates linear precoding scheme that maximizes mutual information for multiple-input multiple-output (MIMO) channels with finite-alphabet inputs. In contrast with recent studies, optimizing mutual information directly with extensive computational burden, this work proposes a low-complexity and high-performance design. It derives a lower bound that demands low computational effort and approximates, with a constant shift, the mutual information for various settings. Based on this bound, the precoding problem is solved efficiently. Numerical examples show the efficacy of this method for constant and fading MIMO channels. Compared to its conventional counterparts, the proposed method reduces the computational complexity without performance loss.
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