论文标题
下行链路网络中非正交多访问的动态用户配对
Dynamic User Pairing for Non-Orthogonal Multiple Access in Downlink Networks
论文作者
论文摘要
本文考虑了一个下行链路（DL）系统，该系统非正交多访问（NOMA）光束成型和动态用户配对将共同优化，以最大程度地提高所有DL用户的最小吞吐量。由此产生的问题属于一类混合企业非凸优化。为了解决该问题，我们首先将二进制变量放松到连续的变量，然后基于内部近似方法设计一种迭代算法，该算法至少提供了局部最佳解决方案。数值结果验证了所提出的算法优于其他算法，例如传统的光束形成，Noma具有随机配对和启发式搜索策略。
This paper considers a downlink (DL) system where non-orthogonal multiple access (NOMA) beamforming and dynamic user pairing are jointly optimized to maximize the minimum throughput of all DL users. The resulting problem belongs to a class of mixed-integer non-convex optimization. To solve the problem, we first relax the binary variables to continuous ones, and then devise an iterative algorithm based on the inner approximation method which provides at least a local optimal solution. Numerical results verify that the proposed algorithm outperforms other ones, such as conventional beamforming, NOMA with random-pairing and heuristic-search strategies.
