基于空时聚焦传输的多源单中继超宽带网络传输性能分析Performance.PDF

第 33 卷第 3 期 通 信 学 报 Vol.33 No. 3 2012 年 3 月 Journa l on Communications March 2012 基于空时聚焦传输的多源单中继超宽带网络传输性能分析 田亚飞，杨晨阳 （北京航空航天大学 电子信息工程学院，北京100191 ） 摘 要：超宽带空时聚焦传输降低了多用户传输时的互相干扰，可以让多个源节点和多个目的节点通过一个中继 节点进行通信。研究了基于空时聚焦传输的多源单中继超宽带网络的传输性能，分别推导了多址阶段和广播阶段 的中断概率，得到了网络吞吐量与用户数目、节点距离、超宽带脉冲宽度、信号帧周期、接收信干噪比等参数之 间的解析关系，并通过最大化网络吞吐量以及优化结果分析得到了传输方案的设计准则。最后，仿真结果验证了 不同路径损耗因子下 2 个阶段的中断概率。 关键词：超宽带通信；空时聚焦；协作中继 中图分类号：TN925 文献标识码：A 文章编号：1000-436X(2012)03-0020-08 Performance of multiple-source single-relay ultra-wideband networks based on space-time focusing transmission TIAN Ya-fei, YANG Chen-yang (School of Electronics and Information Engineering, Beihang University, Beijing 100191, China) Abstract: Space-time focusing transmission can reduce multi user interference in ultra-wideband (UWB) communica- tions. Thus enable one relay forwarding the data from multiple sources to multiple destinations. Performance of relay networks with space-time focusing transmission was studied. The outage probabilities in multiple-access phase and broadcasting phase were derived, respectively. The explicit connection between the network throughput and the user number, distance between nodes, UWB pulse width, signal frame duration, and the received signal-to-interference- and-noise ratio was obtained. By maximizing the network throughput and ana zing the optimization results, some design guidelines for the transmission scheme were provided. The outage probabilities in