中继OFDMA系统的自适应资源分配策略研究

为解决中继OFDMA系统的资源分配问题，本文提出一种基于对偶分解的资源分配算法，该算法能够将一个复杂的问题分解成若干个子问题进行求解，降低了计算的复杂度。通过对各子问题的求解，可以获得最优的中继节点的选择方案以及功率、子载波的分配方案。仿真结果表明，该算法能够在保障不同用户的速率需求的条件下，有效地提高系统的容量。

Adaptive Resource Allocation in Relay OFDMA Systems

This paper studies the problem of resource allocation strategy in relay OFDMA systems, a dual decomposition based resource allocation algorithm is proposed. The problem is decomposed into subproblem at each subcarrier, by solving the subproblems, we can obtain the optimal relay selection scheme, power allocation and subcarrier assignment. Simulation results show that the proposed algorithm can efficiently improve the capacity of the system, and guarantee each user’s QoS requiremnet at the same time.