文章基本信息

标题：Fairness-Aware and Energy Efficiency Resource Allocation in Multiuser OFDM Relaying System
本地全文：下载
作者：Guangjun Liang ; Qi Zhu ; An Yan 等
期刊名称：Mobile Information Systems
印刷版ISSN：1574-017X
出版年度：2016
卷号：2016
DOI：10.1155/2016/7364154
出版社：Hindawi Publishing Corporation
摘要：A fairness-aware resource allocation scheme in a cooperative orthogonal frequency division multiple (OFDM) network is proposed based on jointly optimizing the subcarrier pairing, power allocation, and channel-user assignment. Compared with traditional OFDM relaying networks, the source is permitted to retransfer the same data transmitted by it in the first time slot, further improving the system capacity performance. The problem which maximizes the energy efficiency (EE) of the system with total power constraint and minimal spectral efficiency constraint is formulated into a mixed-integer nonlinear programming (MINLP) problem which has an intractable complexity in general. The optimization model is simplified into a typical fractional programming problem which is testified to be quasiconcave. Thus we can adopt Dinkelbach method to deal with MINLP problem proposed to achieve the optimal solution. The simulation results show that the joint resource allocation method proposed can achieve an optimal EE performance under the minimum system service rate requirement with a good global convergence.