论文标题
上行链路自适应Noma的性能分析取决于渠道知识
Performance Analysis of Uplink Adaptive NOMA Depending on Channel Knowledge
论文作者
论文摘要
非正交多重访问（NOMA）是满足未来无线网络中大型用户密度的关键技术。但是，由于用户间干扰，与正交多重访问（OMA）相比，NOMA可能会提供较差的性能。在本文中，当没有通道状态信息（CSIT）可用时，我们获得上行链路NOMA和OMA吞吐量的封闭形式表达式，并且假设瞬时速率应大于最小阈值时，则在平均数据速率中获得了平均数据速率。 OMA和NOMA的分析比较证明，在所有情况下都没有有效的全球主导策略。基于这个结论，我们提出了一种称为NOMA自适应（NOMA-A）的新的多访问（MA）策略，该策略选择了OMA和NOMA之间的最佳MA技术。 NOMA-A旨在最大化NO CSIT情况下的总和吞吐量，以及在完整的CSIT情况下两个用户都活跃的概率。 NOMA-A被证明在总和吞吐量和速率方面胜过其他策略。
Non Orthogonal Multiple Access (NOMA) is a key technique to satisfy large users densities in future wireless networks. However, NOMA may provide poor performance compared to Orthogonal Multiple Access (OMA) due to inter-user interference. In this paper, we obtain closed-form expressions of the uplink NOMA and OMA throughputs when no Channel State Information at Transmitter (CSIT) is available, and of the average data rates assuming that instantaneous rates should be larger than a minimum threshold when full CSIT is available. Analytical comparisons of OMA and NOMA prove that there is no global dominant strategy valid in all situations. Based on this conclusion, we propose a new multiple-access (MA) strategy called NOMA-Adaptive (NOMA-A) that selects the best MA technique between OMA and NOMA. NOMA-A aims at maximizing the sum throughput in the no CSIT case, and the probability that both users are active in the full CSIT case. NOMA-A is shown to outperform the other strategies in terms of sum throughput and rate.
