摘要
讨论和研究了高频谱效率的双向四节点无线网络中继协作策略。其系统模型为线型放置的4个节点要通过中间2个节点的中继协作来实现2组数据的交换。基于该系统模型,给出了只采用叠加编码技术的双向中继传输策略(SC-relaying)和联合网络编码与叠加编码的双向中继协作传输策略(JNSC-relaying),并对它们可获得的速率范围和吞吐量性能做了分析和讨论。数值分析结果表明,在可获得的速率范围性能方面,JNSC-relaying策略并没有明显的优势;然而在吞吐量性能方面,JNSC-relaying策略可获得明显的性能改进。
Bi-directional relaying strategies for linear four-node wireless network are discussed.The system model is that linear four nodes realize the bi-directional information exchanges of two pairs of packets through the cooperation of the intermediate two nodes.Each node is equipped with single antenna operating in half-duplex mode,and each transmission period consists of four time slots.For this cooperative bi-directional relaying model,three relaying strategies are proposed,i.e.superposition coding bi-directional relaying strategies(SC-relaying),joint network coding and superposition coding bi-directional relaying strategies(JNSC-relaying),and the bi-directional relaying strategies based on cognitive receiver(JNSC-C-relaying).The analysis of achievable rate range is provided.The results have shown that the strategy based on cognitive receiver is superior to the other two strategies in terms of the performance of achievable rate region.
出处
《南京邮电大学学报(自然科学版)》
2010年第5期26-32,共7页
Journal of Nanjing University of Posts and Telecommunications:Natural Science Edition
基金
国家重点基础研究发展计划(973计划)(2007CB310607)
国家自然科学基金(61071090)
江苏省普通高校研究生科研创新计划(CX10B-184Z)资助项目
关键词
无线通信
叠加编码
网络编码
吞吐量
wireless communications
superposition coding
network coding
throughput