In this paper, we propose a novel successive sub-array activation (SSAA) diversity scheme for a massive multiple-input multiple-output (MIMO) system in combination with non-orthogonal multiple access (NOMA). Considering a single-cell multi-cluster downlink scenario, where the base station (BS) sends redundant symbols through multiple transmit sub-arrays to multi-antenna receivers, a low-complexity two-stage beamformer, that is constructed based only on the long-term channel statistical information, is proposed. An in-depth analytical analysis is carried out, in which an exact closed-form expression for the outage probability is derived. A high signal-to-noise ratio (SNR) outage approximation is obtained and the system diversity order is determined. The ergodic sum-rate is also investigated, in which a closed-form solution is evaluated considering a particular case. Numerical and simulation results are provided to validate the analytical analysis and to demonstrate the performance superiority of the proposed SSAA scheme. For example, our results show that the proposed system operating with SSAA outperforms conventional full array massive MIMO setups.

中文翻译：

---

具有连续子阵列激活的大规模 MIMO-NOMA 网络

在本文中，我们提出了一种新的连续子阵列激活 (SSAA) 分集方案，用于结合非正交多址 (NOMA) 的大规模多输入多输出 (MIMO) 系统。考虑到单小区多集群下行链路场景，基站 (BS) 通过多个发射子阵列向多天线接收器发送冗余符号，这是一种低复杂度的两级波束形成器，仅基于长-term 信道统计信息，建议。进行了深入的分析分析，其中推导出了停电概率的精确闭式表达式。获得高信噪比 (SNR) 中断近似值并确定系统分集阶数。也研究了遍历总和率，其中考虑特定情况来评估封闭形式的解决方案。提供了数值和模拟结果来验证分析分析并证明所提出的 SSAA 方案的性能优越性。例如，我们的结果表明，使用 SSAA 运行的建议系统优于传统的全阵列大规模 MIMO 设置。