比例公平保证的MIMO-OFDM系统能效资源分配

doi:10.13190/j.jbupt.2015.04.015

北京邮电大学学报 ›› 2015, Vol. 38 ›› Issue (4): 70-75.doi: 10.13190/j.jbupt.2015.04.015

比例公平保证的MIMO-OFDM系统能效资源分配

徐桂贤¹, 马卫国², 任余维¹

1. 北京邮电大学信息与通信工程学院, 北京 100876;
2. 电信科学技术研究院无线移动通信国家重点实验室, 北京 100191

收稿日期:2014-11-24 出版日期:2015-08-28 发布日期:2015-08-28
作者简介:徐桂贤(1987-),男,博士生,E-mail:xuguixian2012@bupt.edu.cn;马卫国(1970-),男,教授,博士生导师.
基金资助:
国家"863计划"项目(2014AA01A705)

Proportional Fairness-guaranteed Energy-efficient Resource Allocation for MIMO-OFDM Systems

XU Gui-xian¹, MA Wei-guo², REN Yu-wei¹

1. School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China;
2. State Key Laboratory of Wireless Mobile Communications, China Academy of Telecommunications Technology (CATT), Beijing 100191, China

Received:2014-11-24 Online:2015-08-28 Published:2015-08-28

摘要/Abstract

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.

关键词: MIMO-OFDM系统, 资源分配, 能效, 比例公平

Abstract:

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 energy-efficient transmit power is obtained under assumption of flat fading and subcarrier sharing. The equal-power 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.

Key words: MIMO-OFDM system, resource allocation, energy efficiency, proportional fairness

中图分类号:

TN929.53

徐桂贤, 马卫国, 任余维. 比例公平保证的MIMO-OFDM系统能效资源分配[J]. 北京邮电大学学报, 2015, 38(4): 70-75.

XU Gui-xian, MA Wei-guo, REN Yu-wei. Proportional Fairness-guaranteed Energy-efficient Resource Allocation for MIMO-OFDM Systems[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2015, 38(4): 70-75.

参考文献

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比例公平保证的MIMO-OFDM系统能效资源分配

Proportional Fairness-guaranteed Energy-efficient Resource Allocation for MIMO-OFDM Systems

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