同频干扰环境下双向AF中继性能分析及参数优化

发布时间：2018-01-24 20:59

本文关键词： 双向中继放大转发同频干扰中断概率功率分配中继位置　出处：《信号处理》2014年12期 　论文类型：期刊论文

【摘要】：双向中继(two-way relaying,TWR)作为提高中继网络频谱效率的一种有效手段,近年来受到广泛关注。本文研究同频干扰环境下三时隙TWR策略的中断概率性能,中继采用放大转发(amplify-and-forward,AF)策略。首先,理论推导了策略中断概率下界的闭合表达式和高信噪比下的渐进表达式。仿真表明,理论结果能够匹配策略的实际中断概率性能。根据理论结果,以最小化中断概率为目标对中继节点功率分配和中继位置参数进行优化。提出三种优化问题,即(1)给定中继位置,中继功率分配优化问题,(2)给定中继功率分配方案,中继位置优化问题,(3)联合优化中继功率分配和中继位置。仿真结果表明,联合优化能够实现最优的中断概率性能。
[Abstract]:Two-way relaying TWR) is an effective means to improve the spectral efficiency of relay networks. In recent years, attention has been paid to the outage probability performance of the three-slot TWR strategy in the same frequency interference environment. The relay adopts amplifying forwarding amplify-and-forward. First of all, the closed expression of the lower bound of the strategy interruption probability and the asymptotic expression under the high SNR are derived theoretically. The theoretical results can match the actual interrupt probability performance of the strategy. According to the theoretical results, the relay node power allocation and relay location parameters are optimized with the objective of minimizing the interrupt probability. Three optimization problems are proposed. That is to say, given relay position, relay power allocation optimization problem 2) given relay power allocation scheme, relay position optimization problem. Simulation results show that the joint optimization can achieve optimal outage probability performance.
【作者单位】：解放军理工大学通信工程学院;
【基金】：国家自然科学基金项目(61371123);国家自然科学基金青年项目(61301165) 江苏青年基金项目(BK2012055) 江苏基金重点专项(江苏973)项目(BK2011002)资助
【分类号】：TN929.5
【正文快照】： 1引言近年来,中继技术作为一种扩大无线网络覆盖,同时提供空间分集增益的有效手段已经被IEEE802.11s,IEEE802.16j和LTE-Advanced等多个无线通信标准采纳。但是,如文献[1]所示,中继的引入使得信源到信宿一次传输所需的信道占用翻倍,降低了网络的频偏效率。为了提高频谱效率,双

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