The scenario of an uplink two-user non-orthogonal multiple access (NOMA) communication system is analytically studied when it operates in the short packet transmission regime. The considered users support mobility and each is equipped with a single antenna, while they directly communicate with a multi-antenna base station. Power-domain NOMA is adopted for the signal transmission as well as the successive interference cancellation approach is performed at the receiver for decoding. The packet error rate (PER) is obtained in simple closed formulae under independent Rayleigh faded channels and for arbitrary user mobility profiles. The practical time variation and correlation of the channels is also considered. Moreover, useful engineering insights are manifested in short transmission time intervals, which define a suitable setup for the forthcoming ultra-reliable and low latency communication systems. Finally, it turns out that the optimal NOMA power allocation can be computed in a straightforward cost-effective basis, capitalizing on the derived PER expressions.
翻译:在短包传输系统下运行时,正在分析研究双用户非垂直多重存取通信系统(NOMA)的上链接情景;被考虑的用户支持移动,每个用户都配有单一天线,他们与多天线基站直接通信;信号传输和连续取消干扰的接收器采用电源域NOMA,进行信号传输和连续取消干扰的方法;包错误率(PER)在独立的Rayleigh淡化频道下以简单的封闭公式获得,用户移动特征则任意获取;还考虑了频道的实际时间变化和关联性;此外,有用的工程洞见还体现在传输间隔短的时间间隔中,为即将到来的超可靠低拉特朗通信系统确定了适当的设置;最后,结果显示,最佳NOMA电力配置可以在成本有效的基础上直接计算,以衍生的PER表达方式为基础。