摘要
针对电力线通信自适应OFDM系统的限制条件,探讨在每OFDM符号内各RT用户要求的约束下,研究系统总功率地窖注水分配后多子载波上的速率自适应子载波分配模型,提出一种新的动态子载波组分配算法。在典型电力线信道环境下对其仿真,并与另外两种分配算法进行比较,结果表明,本文动态子载波组分配算法的复杂度大大减小,能满足多用户资源分配的多目标要求。
An adaptive subcarrier allocation model for adaptive muhiuser orthogonal frequency division multiplex （OFDM） power-line communication systems is researched after allocation of the system＇s total power by cellar water-filling under the restrictions for each subcarrier in each OFDM symbol. A new subearrier-group dynamic allocation algorithm was proposed. In typical power-line channel scenarios, the proposed algorithm was compared to the subearrier-group allocation algorithm with only one subcarrier in the group and to the subcarrier by subcarrier allocation algorithm without determinist＇s preferential information. Form the simulation results, it shows that the performance of the proposed subcarrier-group dynamic allocation algorithm is better. So the proposed algorithm can satisfy the dynamic multi-objective requirements of multiuser resource allocation.
出处
《电子技术应用》
北大核心
2010年第10期84-88,共5页
Application of Electronic Technique
基金
国家自然科学基金资助项目(60402004)
湖南省教育厅资助项目(07C643)
