多用户OFDM系统基于用户调度的子载波和比特分配算法  

Subcarrier and bit allocation algorithm based on user scheduling for multiuser OFDM system

作　　者：司钊[1] 张静[1] 董建萍[1] 张军[1] 

机构地区：[1]上海师范大学信息与机电工程学院,上海200234

出　　处：《上海师范大学学报（自然科学版）》2009年第6期613-618,共6页Journal of Shanghai Normal University(Natural Sciences)

基　　金：上海市教委项目(CL200516)

摘　　要：在多用户正交频分复用(OFDM)系统中,通过运用调度技术对动态资源分配的贪婪算法进行改进,增加了系统接入用户的数量.该算法中,基站的调度器根据用户的服务要求(QoS)确定用户分配资源的优先权,无线资源分配模块(RRA)根据用户调度信息,利用贪婪算法动态分配子载波和比特给用户.仿真结果表明:与原始贪婪算法相比,改进算法能满足更多用户的服务要求.In this paper, greedy algorithm used in dynamic resource allocation is improved by importing scheduling technique for muhiuser OFDM system. The number of accessed user is increased in system. In improved algorithm, the scheduler on base station will confirm user＇s priority according to user＇s quality of service （QoS）. Radio Resource Allocation （RRA） dynamically allocates subcarrier and bit to user by applying greedy algorithm. Simulation results show that the improved algorithm can provide satisfied service to more users compared with initial greedy algorithm.

关 键 词：多用户 正交频分复用 用户调度 子载波和比特分配 贪婪算法 

分 类 号：TN929.5[电子电信—通信与信息系统]