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比例公平保证的MIMO-OFDM系统能效资源分配 被引量：3

Proportional Fairness-Guaranteed Energy-Efficient Resource Allocation for MIMO-OFDM Systems
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摘要 针对下行多输入多输出-正交频分复用(MIMO-OFDM)系统,提出了满足在总功率限制和用户比例公平性约束下,使系统能量效率最大化的资源分配算法.为了降低计算复杂度,提出了两步优化的次优子载波和功率分配算法.第1步由子载波共享和平坦衰落假设得到估计的能效发射功率,并采用等功率分配方法完成子载波分配;第2步在子载波分配基础上完成能效最优的功率分配.仿真结果表明,所提算法以较低的复杂度逼近最优算法的性能,并且在保证用户比例公平性的同时带来明显的能效提升. An energy efficient resource allocation algorithm for downlink multiple-input-multiple-output orthogonal frequency division multiple（ MIMO-OFDM） system was proposed to implement the energy efficiency（ EE） maximization,satisfying total power constraint as well as the proportional rate constraints.In order to reduce the computational complexity,a two-step subcarrier assignment and power allocation scheme was proposed to derive the suboptimal solution of the optimization problem. The estimated energyefficient transmit power is obtained under assumption of flat fading and subcarrier sharing. The equalpower allocation-based method was adopted to carry out subcarrier assignment. Furthermore,the optimal energy-efficient power allocation was derived according to the result of the first-step subcarrier assignment. Simulations show that the proposed algorithm brings remarkable gains on energy efficiency and guarantees proportional fairness of the users.
作者 徐桂贤 马卫国 任余维
机构地区 北京邮电大学信息与通信工程学院 电信科学技术研究院无线移动通信国家重点实验室
出处 《北京邮电大学学报》 EI CAS CSCD 北大核心 2015年第4期68-73,共6页 Journal of Beijing University of Posts and Telecommunications
基金 国家高技术研究发展计划(863计划)项目(2014AA01A705)
关键词 多输入多输出-正交频分复用系统 资源分配 能效 比例公平 multiple-input-multiple-output orthogonal frequency division multiple system resource allocation energy efficiency proportional fairness
分类号 TN929.53 [电子电信—通信与信息系统]
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参考文献12

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共引文献1

同被引文献31

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引证文献3

二级引证文献5

北京邮电大学学报
2015年 第4期

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