Finite Dimension Wyner-Ziv Lattice Coding for Two-Way Relay Channel

Sinda Smirani (1) , Mohamed Kamoun (1) , M. Sarkis (1) , Abdellatif Zaidi (2) , Pierre Duhamel (3)

1 DIASI - Département Intelligence Ambiante et Systèmes Interactifs
2 LIGM - Laboratoire d'Informatique Gaspard-Monge
3 L2S - Laboratoire des signaux et systèmes

Two-way relay channel (TWRC) models a cooperative communication situation performing duplex transmission via a relay station. For this channel, we have shown previously that a lattice-based physical layer network coding strategy achieves, at the limit of arbitrarily large dimension, the same rate as that offered by the random coding-based regular compress-and-forward. In this paper, we investigate a practical coding scheme using finite dimension lattices and offering a reasonable performance-complexity trade-off. The algorithm relies on lattice based quantization for Wyner-Ziv coding. We characterize the rate region allowed by our coding scheme, discuss the design criteria, and illustrate our results with some numerical examples.

Keywords: TWRC; compress and forward; Wyner-Ziv; lattice codes; finite dimension

Domains: Networking and Internet Architecture [cs.NI]; Signal and Image processing; Signal and Image Processing

Sinda Smirani, Mohamed Kamoun, M. Sarkis, Abdellatif Zaidi, Pierre Duhamel. Finite Dimension Wyner-Ziv Lattice Coding for Two-Way Relay Channel. IEEE 14th Workshop on Signal Processing Advances in Wireless Communications (SPAWC 2013), Jun 2013, Darmstadt, Germany. pp.1-5, ⟨10.1109/spawc.2013.6612114⟩. ⟨hal-00816670⟩