基于速率约束的OFDM中继链路能效最优资源分配策略

发布时间：2018-03-11 14:36

本文选题：无线通信　切入点：能效　出处：《电子与信息学报》2014年09期 　论文类型：期刊论文

【摘要】：该文研究解码转发(DF)模式的OFDM中继链路的能效最大化资源分配问题。与现有典型的固定速率最小化发射功率或无约束最大化能效算法不同,该文考虑电路功率消耗的前提下,将问题建模为以最大化系统能效为目标,同时考虑用户最小速率需求、源节点S和中继节点R各自总发射功率约束下的联合子载波配对和最优功率分配问题。证明了速率和功率联合约束条件下中继链路全局能效最优解的唯一性,在此基础上提出一种低复杂度联合最优资源分配策略。仿真结果表明,该文所提方案能够在最小速率和S/R节点最大发射功率约束下自适应分配功率资源,实现系统能效最优,并能够降低链路的中断概率。
[Abstract]:In this paper, the problem of energy efficiency maximization resource allocation for OFDM relay link in decoded forwarding (DFF) mode is studied. Different from the typical fixed rate minimization of transmit power or unconstrained maximization of energy efficiency, this paper considers the power consumption of the circuit. The problem is modeled as the goal of maximizing system energy efficiency, taking into account the minimum rate requirements of the user. The joint subcarrier pairing and optimal power allocation problem of source node S and relay node R under the constraints of total transmit power respectively are discussed. The uniqueness of the global energy efficiency optimal solution of relay link under the condition of combined rate and power constraints is proved. On this basis, a joint optimal resource allocation strategy with low complexity is proposed. Simulation results show that the proposed scheme can allocate power resources adaptively under the constraints of minimum rate and maximum transmit power of S / R nodes, and achieve optimal system energy efficiency. And can reduce the link interruption probability.
【作者单位】：西南交通大学信息编码与传输省重点实验室;
【基金】：国家自然科学基金(61071108) 中央高校基本科研业务费专项资金青年教师百人计划(SWJTU2011BR065EM)资助课题
【分类号】：TN929.5

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