This paper develops new suboptimal antenna selection (AS) schemes, majority based transmit antenna selection/maximal ratio combining (TAS-maj/MRC) and joint transmit and receive antenna selection (JTRAS-maj), in a multiple-input multiple-output non-orthogonal multiple access (MIMO-NOMA) network. The impact of the channel estimation errors (CEEs) and feedback delay (FD) on the performance of the network is studied in Nakagami-m fading channels. First, the outage behavior of the network is investigated in a unified manner for the proposed AS schemes by deriving the closed-form expression of the exact outage probability (OP). Next, in the presence of the CEEs and FD, the corresponding upper bound of the OP is obtained. The OP expression in high signal-to-noise ratio region is then provided to illustrate an error floor value in the presence of the CEEs and FD as well as diversity and array gains in the absence of the CEEs and FD. Finally, the analytical results in the presence and absence of the CEEs and FD are verified by the Monte Carlo simulations. The numerical results show that the proposed majority based AS schemes are superior to both max-max-max and max-min-max based AS schemes and the system performance is more sensitive to the CEE than FD.

中文翻译：

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具有信道估计误差和反馈延迟的下行NOMA网络中基于多数的天线选择方案

本文开发了一种新的次优天线选择（AS）方案，基于多数的发射天线选择/最大比率组合（TAS-maj / MRC）以及联合发送和接收天线选择（JTRAS-maj），用于多输入多输出非正交多址（MIMO-NOMA）网络。在Nakagami-m衰落信道中研究了信道估计误差（CEE）和反馈延迟（FD）对网络性能的影响。首先，通过推导精确中断概率（OP）的闭式表达式，以统一的方式针对建议的AS方案研究网络的中断行为。接下来，在存在CEE和FD的情况下，获得OP的相应上限。然后提供高信噪比区域中的OP表达式，以说明存在CEE和FD时的底限误差值，以及不存在CEE和FD时的分集和阵列增益。最后，通过蒙特卡洛模拟验证了存在和不存在CEE和FD的分析结果。数值结果表明，所提出的基于多数的AS方案优于基于max-max-max和基于max-min-max的AS方案，并且系统性能对CEE的敏感性高于FD。