Open AccessNetwork‐coded rateless coding scheme in erasure multiple‐access relay enable communications
Author(s) -
Gu Shushi,
Jiao Jian,
Zhang Qinyu,
Yang Zhihua,
Xiang Wei,
Cao Bin
Publication year - 2014
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2013.0488
Subject(s) - relay , computer science , linear network coding , erasure , computer network , degree distribution , relay channel , coding (social sciences) , online codes , binary erasure channel , channel (broadcasting) , decoding methods , topology (electrical circuits) , algorithm , channel capacity , network packet , mathematics , block code , complex network , linear code , world wide web , power (physics) , quantum mechanics , programming language , statistics , physics , combinatorics
This study proposes a novel adaptive network‐coded rateless coding scheme for an erasure multiple‐access relay system with two distributed sources and an asymmetric network topology. To increase transmission efficiency, a two‐dimensional degree distribution, as part of network‐coded relay protocol, is designed based on the AND–OR tree analysis technique. The degree distributions of rateless coding at the sources and network coding at the relay are optimised by the linear programming approach under asymmetric channel conditions. Simulation results demonstrate that the proposed scheme outperforms existing classical relay protocols under time‐varying channel conditions, and achieves a significantly better performance.