基于公平度门限的多用户OFDM系统自适应资源分配算法

在传统的子载波分配过程中,具有优先权的用户将优先选择最好的载波,这将导致载波利用效率下降.许多改进算法通过牺牲一定的公平性来提升容量并降低复杂度,但是这可能会使用户间无法达到所要求的公平性.针对这些问题,提出了一种基于公平度门限的载波和功率自适应分配算法.在载波分配过程中,通过公平度门限来决定载波分配优先级,从而实现容量和公平度的粗略折中.载波分配后利用粒子群(PSO)算法进行功率分配来达到所要求的公平度门限.实验结果表明,该算法在满足所要求公平度门限的同时提升了系统容量.

Adaptive resource allocation in multiuser OFDM system based on fairness threshold

In traditional sub-carrier allocation process,user with the highest priority can choose best sub-carrier,which will result in low utilization of sub-carriers.Current improved algorithms can im-prove system capacity and reduce algorithm complexity by sacrificing certain fairness,but they may not achieve fairness requirement among users.In order to solve this problem,a new adaptive resource allo-cation algorithm based on fairness threshold was proposed,in which the priority of the sub-carrier allo-cation was ...