物理层网络编码分组的机会中继

吕凌; 于宏毅

doi:10.3724/SP.J.1146.2008.00640

物理层网络编码分组的机会中继

doi: 10.3724/SP.J.1146.2008.00640

吕凌,
于宏毅

基金项目:

国家发改委CNGI示范工程(CNGI-04-10-1D)资助课题

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出版历程
- 收稿日期: 2008-05-22
- 修回日期: 2009-01-23
- 刊出日期: 2009-07-19

Opportunistic Relaying of the Physical-Layer Network Coding Packets

摘要

摘要: 为提升物理层网络编码方案的抗衰落性能，该文提出了一种基于物理层网络编码的机会中继方案(Opportunistic Relaying based-on Physical-layer Network Coding，PNC-OR)，该方案利用物理层网络编码的基本思想、有效提升网络吞吐的同时，通过中继节点的分布式选择，也能够使系统获得多用户分集增益，提高了系统的抗衰落性能。针对双向无线中继信道中端到端信息交换的情形，推导了准静态衰落环境下PNC-OR中多个目的节点接收信息的和容量。数值结果显示：和机会中继、传统网络编码两种方案相比，PNC-OR具有更高的频谱效率，并且随着中继节点的增多，频谱效率也越高。
- 物理层网络编码;机会中继;协作分集;中断容量;节点选择
Abstract: To combat fading in wireless channel, an Opportunistic Relaying scheme based on Physical-layer Network Coding (PNC-OR) is proposed, which not only improves the network throughput by network coding ideas, but also achieves the multi-user diversity gain through relay node selection. Focusing on the bi-directional wireless relaying channels, the sum capacity of the destination nodes in the PNC-OR scheme for the quasi-static fading environment is developed. The numerical results show that in contrast to the opportunistic relaying scheme and conventional network coding scheme, PNC-OR scheme achieves higher spectral efficiency.

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