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Superposition Coding Based Wireless Network Coding Scheme for Two-Way Cooperative Relaying

Megumi KANEKO, Kazunori HAYASHI, Hideaki SAKAI

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Summary :

Recent advances in cooperative communication and wireless Network Coding (NC) may lead to huge performance gains in relay systems. In this context, we focus on the two-way relay scenario, where two nodes exchange information via a common relay. We design a practical Superposition Coding (SC) based NC scheme for Decode-and-Forward (DF) half-duplex relaying, where the goal is to increase the achievable rate. By taking advantage of the direct link and by providing a suboptimal yet efficient power division among the superposed layers, our proposed SC two-way relaying scheme outperforms the reference schemes, including the well-known 3-step DF-NC scheme and the capacity of 2-step schemes for a large set of SNRs, while approaching closely the performance bound.

Publication
IEICE TRANSACTIONS on Communications Vol.E93-B No.12 pp.3354-3361
Publication Date
2010/12/01
Publicized
Online ISSN
1745-1345
DOI
10.1587/transcom.E93.B.3354
Type of Manuscript
Special Section PAPER (Special Section on Wireless Distributed Networks)
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