基于OFDM的DF中继链路能效最优资源分配策略

发布时间：2018-01-15 19:37

本文关键词：基于OFDM的DF中继链路能效最优资源分配策略　出处：《西南交通大学学报》2014年03期 　论文类型：期刊论文

【摘要】：针对DF模式的OFDM中继链路,将能效最大化资源分配问题转化为在用户最小速率需求和系统总发射功率受约束条的件下,子载波配对和功率分配的联合优化问题,提出一种低复杂度联合最优资源分配策略,并证明速率和功率约束条件下中继链路全局能效最优解的唯一性.仿真结果表明,与固定子载波配对策略相比,当中继节点位于源和目的节点连线中点位置,Rmin=1.5 Mbit/s时,排序子载波配对策略的链路可达速率和系统能效分别提高了2.3%和3.1%;与传统的等功率分配、速率最大化和功率最小化注水算法相比,本文方案能够在保证用户最小速率需求和系统功率约束的同时,自适应分配资源以实现系统能效最优.
[Abstract]:For DF mode OFDM relay link, the problem of energy efficiency maximization resource allocation is transformed into a piece with the user's minimum rate requirement and the total transmission power of the system constrained by the bar. A low complexity joint optimal resource allocation strategy is proposed for the joint optimization of subcarrier pair and power allocation. The uniqueness of the global energy efficiency optimal solution of relay link under speed and power constraints is proved. The simulation results show that the relay node is located at the midpoint of the source and destination nodes when compared with the fixed subcarrier pairing strategy. In Rmin=1.5 Mbit/s, the link reachability rate and system energy efficiency of the sorting subcarrier pairing strategy are improved by 2.3% and 3.1, respectively. Compared with the traditional equal-power allocation, rate maximization and power minimization water injection algorithms, the proposed scheme can ensure the minimum rate requirements and system power constraints at the same time. Adaptive allocation of resources to achieve optimal system energy efficiency.
【作者单位】：西南交通大学信息编码与传输省重点实验室;西南交通大学峨眉校区;
【基金】：国家自然科学基金资助项目(61071108) 中央高校基本科研业务费专项资金青年教师百人计划资助项目(SWJTU2011BR065EM)
【分类号】：TN929.5
【正文快照】： 无线多媒体业务的爆炸式增长导致无线网络吞吐量需求的快速增加,一方面,运营商需要布置更多的基站设备,增强小区覆盖,提升网络吞吐量,但这必然会导致基站设备能耗的增加,同时也增加了网络运营成本;另一方面,无线网络移动终端设备的电池技术发展远远赶不上移动终端由于高吞吐量

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