Abstract
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].
| Original language | English |
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| Title of host publication | EuCNC 2014 |
| Subtitle of host publication | European Conference on Networks and Communications |
| Publisher | IEEE Computer Society |
| Number of pages | 5 |
| ISBN (Print) | 9781479952809 |
| DOIs | |
| Publication status | Published - 1 Jan 2014 |
| Event | 2014 European Conference on Networks and Communications, EuCNC 2014 - Bologna, United Kingdom Duration: 23 Jun 2014 → 26 Jun 2014 |
Conference
| Conference | 2014 European Conference on Networks and Communications, EuCNC 2014 |
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| Country/Territory | United Kingdom |
| City | Bologna |
| Period | 23/06/14 → 26/06/14 |