OFDMA中继系统下行链路公平资源分配算法研究

Study of fair resource allocation algorithm for downlink channel in OFDMA relay system

为了公平有效地在OFDMA中继系统下行链路进行资源分配,提出了基于效用函数的资源分配算法,并根据凸优化问题的原始分解理论,提出了相应的分布式求解算法,得到了相关问题的全局最优解。理论分析和数值仿真结果表明,提出的资源分配算法具有较低的系统复杂度,可以使系统效用函数最大,从而在保证用户公平性的前提下,使系统的和速率容量最大。

To allocate resource fairly and efficiently in the downlink channel in OFDMA relay system,this paper proposed a utility-based resource allocation algorithm.According to the primal decomposition methods of convex optimization theory,it developed a distributed algorithm to solve the involved problem and obtain the global optimal solution.The theoretic analysis and numerical simulation results show that the proposed algorithm has low complexity,and the system utility is maximized so that the sum-rate capacity of the system is maximized while the fairness of users in the system is guaranteed.