Fairness for Non-Orthogonal Multiple Access in 5G Systems
Fairness for Non-Orthogonal Multiple Access in 5G Systems
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DOI：
10.1109/lsp.2015.2417119
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发表时间：
2015-10-01
影响因子：
3.9
通讯作者：
Krikidis, Ioannis
中科院分区：
文献类型：
--
作者：
Timotheou, Stelios S;Krikidis, Ioannis
在非正交多址（NOMA）下行链路中，多个数据流在功率域中叠加，并且用户解码基于连续干扰消除。NOMA的性能高度依赖于数据流之间的功率分配和相关的功率分配（PA）问题。在这封信中，我们研究NOMA从公平的角度来看，我们调查PA技术，以确保公平性的下行链路用户下i）瞬时信道状态信息（CSI）在发射机，和ii）平均CSI。虽然制定的问题是非凸的，我们已经开发出低复杂度的多项式算法，在这两种情况下考虑产生的最佳解决方案。
In non-orthogonal multiple access (NOMA) downlink, multiple data flows are superimposed in the power domain and user decoding is based on successive interference cancellation. NOMA's performance highly depends on the power split among the data flows and the associated power allocation (PA) problem. In this letter, we study NOMA from a fairness standpoint and we investigate PA techniques that ensure fairness for the downlink users under i) instantaneous channel state information (CSI) at the transmitter, and ii) average CSI. Although the formulated problems are non-convex, we have developed low-complexity polynomial algorithms that yield the optimal solution in both cases considered.