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OFDM系统中的子载波分配策略 预览

Subcarrier Allocation Scheme for OFDM-based Systems
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摘要 正交频分复用(OFDM)技术是未来宽带无线通信中最流行的技术之一。研究了适用于多用户(OFDM)系统中的多业务间子载波自适应资源分配机制。考虑了每个用的不同业务需求,资源根据每个用户不同的服务质量要求来分配。提出了基于OFDM系统的自适应子载波重分配算法,该算法能够最大程度地灵活分配所有子载波。仿真表明,使用此算法能在很大程度上改善OFDM系统的性能。 Orthogonal frequency division multiplex (OFDM) is currently one of the most popular techniques for future broadband wireless communications.In this paper,we study the adaptive resource allocation for OFDM-based systems in a multi-user and multi-service scenario.The different types of service models for each user are considered,and the resources are adaptively allocated according to the different quality-of-service (QoS) requirement of each user.Furthermore,we propose an adaptive subcarrier re-allocation algorithm for the OFDM-based system.The algorithm could allocate all subcarriers flexibly by the greatest extent.Simulation results show that with the proposed algorithm,the performance of the OFDM-based multi-user and multi-service systems improves greatly.
作者 郭凯 张碧 陈培彬 陈卫 GUO Kai,ZHANG Bi,CHEN Pei-bin,CHEN Wei(Artillery Academy of PLA,Hefei Anhui 230031,China)
机构地区 解放军炮兵学院
出处 《无线电工程》 2010年第8期 16-18,25,共4页 Radio Engineering of China
关键词 OFDM 子载波分配 子载波借调 自适应 OFDM subcarrier allocation subcarrier adjusting and borrowing adaptive
作者简介 郭凯 男,(1976-),解放军炮兵学院博士。主要研究方向:移动通信与无线通信中资源管理、链路传输技术。
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