基于蚁群算法的OFDM系统子载波分配研究
胡山锋;李洪烈;林成浴;宋高俊
【期刊名称】《计算机仿真》 【年(卷),期】2013(030)002
【摘要】The OFDM systems should support more higher information rate and more flexible quality of services because of insufficient wireless resource. As for resource allocation of multiuser OFDM system with proportional rate constrains, the spectrum efficiency of the traditional algorithms is rather low. With the condition of equal power assignment for all subcarriers, an Ant colony algorithm was used in solving Multiuser OFDM system subcarrier allocation with proportional rate constrains in the paper. The algorithm maximizes the sum capacity of multiuser orthogonal frequency division multiplexing systems in downlink transmissions while maintaining proportional fairness. Due to the unique heuristic searching mechanism of Ant Colony algorithm, spectrum efficiency is guaranteed to converge quickly to an approximately optional solution. Simulation results show that the proposed algorithm can guarantee the fairness of proportional rate and improve the frequency spectrum efficiency approximately forty - five percents compared with traditional algorithms.%针对无线资源要求OFDM系统能够支持更高的信息速率,在比例速率约束的多用户OFDM系统资源分配中,传统算法的频谱效率较低.在子载波等功率分配条件下,用蚁群算法解
基于蚁群算法的OFDM系统子载波分配研究
