OFDM系统Femtocell网络下行联合资源分配  

Joint Resource Allocation for Femtocell Networks in Downlink OFDM Systems

作　　者：李鑫滨[1] 宋兴芳[1] 韩松[1] 

机构地区：[1]燕山大学工业计算机控制工程河北省重点实验室,秦皇岛066004

出　　处：《信号处理》2015年第5期544-550,共7页Journal of Signal Processing

基　　金：国家自然科学基金资助项目(61172095);河北省自然科学基金资助项目(F2012203138)

摘　　要：为进一步提高家庭基站(Femtocell)网络中频谱利用率并优化功率分配,在基于正交频分复用技术(OFDM)系统网络中,提出一种子载波联合优化的多用户资源分配算法,即以最大化频谱利用率作为目标函数,加入基站选择因子对家庭基站进行待机模式选择优化,再对用户的子载波资源进行公平分配,最后利用线性封顶注水算法对小区基站用户功率进行优化分配。仿真结果表明,多用户资源分配算法不仅使频谱和功率利用率都得到显著增长,而且提高了系统吞吐量和用户公平性。该家庭基站资源寻优模型有效地改善了频谱紧缺和功率浪费现状,降低了家庭基站之间的干扰。In order to further improve the Femtocell network spectrum utilization and optimize power allocation,in orthogonal frequency division multiplexing（ OFDM） system networks,a subcarrier joint optimization of the multi-users＇ resource allocation algorithm is proposed. This algorithm is to maximize the system spectrum efficiency,which is considered as the objective function,jointing the Femtocell selection factor to optimize the standby mode selection of the Femtocell. Furthermore,the algorithm is to allocate the subcarrier equally and finally use a linear capped water-filling algorithm to optimize the allocation of the Femtocell users＇ power. The simulation results show that multi-users＇ resource allocation algorithm not only improves the spectrum and power utilization significantly,but also increases the system throughput and users＇ fairness. The Femtocell resource optimization model can effectively improve the shortage of spectrum and the waste of power,and reduce the interference of Femtocell.

关 键 词：家庭基站 正交频分复用技术 下行频谱共享 资源分配 

分 类 号：TN929.531[电子电信—通信与信息系统]