Network-coded rateless coding scheme in erasure multiple-access relay enable communications
Network-coded rateless coding scheme in erasure multiple-access relay enable communications
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DOI：
10.1049/iet-com.2013.0488
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发表时间：
2014-03
期刊：
影响因子：
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通讯作者：
Shushi Gu;J. Jiao;Qinyu Zhang;Zhihua Yang;W. Xiang;Bin Cao
中科院分区：
文献类型：
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作者：
Shushi Gu;J. Jiao;Qinyu Zhang;Zhihua Yang;W. Xiang;Bin Cao
本研究提出了一种新颖的自适应网络编码无速率编码方案，用于具有两个分布式源和不对称网络拓扑的擦除多址中继系统。为了提高传输效率，作为网络编码中继协议的一部分，基于与或树分析技术设计了二维度分布。在非对称信道条件下，通过线性规划方法优化了源端无速率编码和中继端网络编码的度分布。仿真结果表明，该方案在时变信道条件下优于现有的经典中继协议，并取得了明显更好的性能。
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.