A novel low complexity energy-efficient resource allocation for OFDM systems
A novel low complexity energy-efficient resource allocation for OFDM systems
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DOI：
10.1002/ett.2932
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发表时间：
2017-01-01
影响因子：
3.6
通讯作者：
Navaie, Keivan
中科院分区：
文献类型：
--
作者：
Kazemi, Jafar;Omidi, Mohammad Javad;Navaie, Keivan
本文在考虑系统电路功率的情况下，研究了基于功率约束和最小速率要求的正交频分复用系统的能量效率。然后将最佳无线电资源分配制定为节能最大化，其中我们提出了一种新的低复杂度解决方案来获得最优解。该方案包括最优源传输功率及其在子载波间的分配。针对以往研究中计算复杂度较高的迭代解，本文提出了一种基于求解非线性对数方程的快速收敛低复杂度方案。为了评估该方法的准确性，我们通过仿真将其与考虑和不考虑电路功率的系统的最优解的精度进行了比较。仿真研究表明，该方法在低信噪比和高信噪比情况下都能提供准确的解。仿真结果还表明，采用本文提出的方法可以显著提高计算复杂度。版权所有：John Wiley & Sons， Ltd
In this paper, we study energy efficiency of an orthogonal frequency division multiplexing based system under power constraint and minimum rate requirement with system circuit power consideration. The optimal radio resource allocation is then formulated as an energy-efficient maximisation where we propose a novel low complexity solution for obtaining the optimal solution. The solution consists of the optimal source transmission power and its distribution among subcarriers. In spite of the iterative solution with high computational complexity in previous works, we propose a quickly convergent low complexity scheme based on solving a nonlinear logarithmic equation. To evaluate the accuracy of the proposed method, we compared its accuracy through simulations with the optimal solution in systems with and without circuit power consideration. Simulation studies indicate that the proposed method provide accurate solutions in both low and high signal to noise ratio regimes. The simulation results also indicate using our proposed method results in a significant improvement in the computational complexity. Copyright (c) 2015 John Wiley & Sons, Ltd.