Eisenstein integer based multi-dimensional coded modulation for physical-layer network coding over F4 in the two-way relay channels
Eisenstein integer based multi-dimensional coded modulation for physical-layer network coding over F4 in the two-way relay channels
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基于爱森斯坦整数的多维编码调制，用于双向中继信道中 F4 物理层网络编码
DOI：
10.1109/eucnc.2014.6882643
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Yi Wang
中科院分区：
文献类型：
--
作者：
Dong Fang;A. Burr;Yi Wang
提出了一种基于爱森斯坦整数Z[w]的新型多维编码调制，用于双向中继信道（TWRC）中有限域F4上的物理层网络编码（PNC）。双二进制 Turbo 码用于在晶格分区 F4≅ Z[w]/2Z[w] 上为所提出的 PNC 设计基于构造 A 的 Z[w] 晶格。为了提高频谱效率，采用Ungerboeck的集合划分映射（MSP）来传输所设计的基于构造A的Z[w]格的编码层和非编码层。提出了一种新颖的软解映射器和一种具有缩小搜索空间的新 ML 解码器来解码中继处的叠加网格。为所提出的软解映射器引入了一种新的映射选择标准，该标准最大化接收信号和网络编码组合之间的互信息。数值结果表明，所提出的 IF4 上的 PNC 优于使用整数强制和信道解码器的计算转发 [5, 10]。
A novel multi-dimensional coded modulation based on Eisenstein integer Z[w] is proposed for physical-layer network coding (PNC) over the finite field F4 in the two-way relay channel (TWRC). The duo-binary turbo code is used to design the Construction A-based Z[w]-lattice for the proposed PNC over the lattice partition F4≅ Z[w]/2Z[w]. In order to improve the spectral efficiency, Ungerboeck's mapping by set partitioning (MSP) is adopted for transmission of coded and uncoded layers of the designed Construction A-based Z[w]-lattice. A novel soft-demapper and a new ML decoder with size-reduced search space are proposed to decode the superimposed lattices at the relay. A new mapping selection criterion which maximizes the mutual information between the received signal and the network coded combination is introduced for the proposed soft-demapper. Numerical results show that the proposed PNC over IF4 is superior to compute-and-forward using integer-forcing and channel decoder [5, 10].