Optimal Joint Power and Subcarrier Allocation for MC-NOMA Systems
Optimal Joint Power and Subcarrier Allocation for MC-NOMA Systems
复制标题
DOI：
10.1109/glocom.2016.7842087
复制
发表时间：
2016-03
期刊：
影响因子：
--
通讯作者：
Yan Sun;D. W. K. Ng;Z. Ding;R. Schober
中科院分区：
文献类型：
--
作者：
Yan Sun;D. W. K. Ng;Z. Ding;R. Schober
本文研究了多载波非正交多址接入（MC-NOMA）系统的资源分配算法设计。该算法是从一个非凸优化问题的加权系统吞吐量最大化的解决方案。我们采用单调优化开发最佳的联合功率和子载波分配策略。由于其高复杂性，最优资源分配策略用作性能基准。此外，为了在计算复杂度和最优性之间取得平衡，提出了一种具有低计算复杂度的次优方案。我们的仿真结果表明，次优算法实现了接近最优的性能和MC-NOMA采用所提出的资源分配算法提供了一个显着的系统吞吐量的改善相比，传统的多载波正交多址接入（MC-OMA）。
In this paper, we investigate the resource allocation algorithm design for multicarrier non-orthogonal multiple access (MC-NOMA) systems. The proposed algorithm is obtained from the solution of a non-convex optimization problem for the maximization of the weighted system throughput. We employ monotonic optimization to develop the optimal joint power and subcarrier allocation policy. The optimal resource allocation policy serves as a performance benchmark due to its high complexity. Furthermore, to strike a balance between computational complexity and optimality, a suboptimal scheme with low computational complexity is proposed. Our simulation results reveal that the suboptimal algorithm achieves a close-to-optimal performance and MC-NOMA employing the proposed resource allocation algorithm provides a substantial system throughput improvement compared to conventional multicarrier orthogonal multiple access (MC-OMA).