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Energy-Efficient Configuration of Power Resource for OFDM-Based Opportunistic Regenerative Relay Links

机译：基于OFDM的机会性再生中继链路的能源高效配置

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摘要

In this paper, adaptive Power allocation (PA) on the source and relay is investigated to maximize Energy efficiency (EE) for OFDM-based Opportunistic regenerative relay links (O2RL). We derive EE function from O2RL model by appropriate definition of variables to represent source/relay PA, Subcarrier transmission mode selection (STMS), and circuit power consumptions elegantly. Theoretical analysis demonstrates that EE function for O2RL is strictly quasi-concave with respect to the overall transmit power. Exploiting the quasi-concavity property of the EE function, an EE-oriented optimal PA iterative method for O2RL is proposed which used the bisection method to speed up the search of the optimum. Simulation results demonstrate that the O2RL is more energy-efficient than Traditional cooperative relaying strategies (TCRS), and the proposed method as compared to the Sum throughput maximization PA (STMPA) method is able to significantly improve performance in terms of system EE.
机译：本文研究了源和中继上的自适应功率分配（PA），以最大程度地提高基于OFDM的机会再生中继链路（O2RL）的能效（EE）。我们通过适当定义变量来从O2RL模型中导出EE函数，以优雅地表示源/中继PA，子载波传输模式选择（STMS）和电路功耗。理论分析表明，对于O2RL的EE函数相对于总发射功率严格是准凹的。利用EE函数的拟凹性质，提出了一种基于EE的O2RL最优PA迭代方法，该方法采用二等分法加快了最优解的搜索速度。仿真结果表明，O2RL比传统的协作中继策略（TCRS）更节能，并且与总吞吐量最大化PA（STMPA）方法相比，该方法可以显着提高系统EE的性能。

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