论文标题
具有不完美SIC的NOMA系统的自适应多用户聚类和功率分配
Adaptive Multi-User Clustering and Power Allocation for NOMA Systems with Imperfect SIC
论文作者
论文摘要
非正交多访问（NOMA）被认为是下一代无线系统的有前途的无线电访问技术。我们考虑一个实用的下行链路NOMA系统，具有不完美的连续干扰取消，并为每个群集中给定数量的用户的功率分配因子得出界限。我们建议在一组用户中，两个连续的NOMA用户之间的最小信噪比加上噪声比率差异标准，以比等效的正交多访问（OMA）系统获得更高的速率。然后，我们建议对下行链路NOMA系统的自适应多用户聚类和功率分配算法。通过广泛的模拟，我们表明所提出的算法获得的速率高于最先进的算法。
Non-orthogonal multiple access (NOMA) is recognized as a promising radio access technique for the next generation wireless systems. We consider a practical downlink NOMA system with imperfect successive interference cancellation and derive bounds on the power allocation factors for a given number of users in each cluster. We propose a minimum signal-to-interference-plus-noise ratio difference criterion between two successive NOMA users in a cluster of users to achieve higher rates than an equivalent orthogonal multiple access (OMA) system. We then propose adaptive multi-user clustering and power allocation algorithms for downlink NOMA systems. Through extensive simulations, we show that the proposed algorithms achieve higher rates than the state-of-the-art algorithms.
