标题： 多用户多天线系统在空地通信中非正交多址接入的中断概率 显示英文标题

标题： On the Outage Probability of Multiuser Multiple Antenna Systems with Non-Orthogonal Multiple Access for Air-Ground Communications

摘要： 本文探讨了多用户多天线系统作为一种提高航空通信系统频谱效率的方法。 为此，在一个现实的基于几何的随机空地（AG）信道模型中研究了多用户多天线系统的中断区域。 在此应用中，用户（飞机）以预定义的目标速率将空中交通管理数据传输到地面站。 由于AG传播的特性，我们认为在此背景下相关的性能指标是信息中断概率。 我们考虑了三种解码方法下的中断概率。 第一种基于逐次干扰消除（SIC）。 第二种通过考虑联合组解码扩展了第一种方法。 第三种是第二种的一个版本，它限制了联合解码用户组的大小，以降低解码复杂度。 结果表明，即使在仅两个用户的组中，联合组解码也能显著提高AG信道的频谱效率，允许大量飞机在一个非正交信道上以非常低的中断概率进行传输。 显示英文摘要

摘要： This paper explores multiuser multiple antenna systems as a means to enhance the spectral efficiency of aeronautical communications systems. To this end, the outage regime for a multiuser multiple antenna system is studied within a realistic geometry-based stochastic air-ground (AG) channel model. In this application, users (aircraft) transmit air traffic management data to the ground station at a predefined target rate. Due to the nature of the AG propagation, we argue that the relevant performance metric in this context is the information outage probability. We consider the outage probability under three decoding approaches. The first is based on successive interference cancellation (SIC). The second extends the first approach by considering joint group decoding. The third is a version of the second that limits the size of the jointly decoded user groups in order to lower the decoding complexity. The results show that joint group decoding, even in groups of only two, can significantly increase the spectral efficiency in the AG channel by allowing a large number of aircraft to transmit over a non-orthogonal channel with very low outage probabilities.