基于进化策略和公平竞争的多用户OFDM系统资源分配

提出了一种用于多用户OFDM系统的资源分配算法(ESFC),能以低复杂度完成用户间的子载波、比特及功率分配,达到快速优化系统发射功率的目的。该算法同时考虑到动态业务的实时性和用户间的公平竞争性,将系统资源分配问题转化为数学模型的多约束优化求解问题。资源分配过程分为两个步骤,包括基于进化策略进行子载波分配和使用注水算法进行比特及功率分配。仿真结果表明:与现有算法相比,该算法能有效降低复杂度,在优化OFDM系统性能的同时兼顾了实时性需求,明显减少了运算量,能快速收敛到优化解。

Multiuser OFDM Resource Allocation Algorithm Based on Evolution Strategy and Fairness Competition

This paper proposes a resource allocation algorithm(ESFC) for multiuser OFDM system,which can allocate the sub-carrier,bit and power among users with low complexity and achieve the fast optimization of system transmitting power.By considering the real-time dynamic service and fair competition among users,the resource allocation problem is changed into a multi-constrained optimization problem.The proposed algorithm is composed of two steps,i.e.,the allocation of sub-carrier based on evolution strategy,and the allocation of bits and power based on water-filling algorithm.The simulation results show that,compared with the existing algorithms,the present algorithm can attain a better real-time requirement while optimizing the performance of OFDM system.Moreover,it can effectively reduce the amount of computation and quicken the convergence to the optimal solution.