In this study, we examine an emerging Multiple-Input-Multiple-Output (MIMO) Non-Orthogonal Multiple Access (NOMA) network which combines Transmit Antenna Selection (TAS) and Simultaneous Wireless Information and Power Transfer (SWIPT) protocols. A pre-coding channels matrix was designed to aid the TAS protocol. We deployed a strong user as a relay to assist a weak user. Three cooperative MIMO-NOMA network scenarios were investigated. In the first scenario, we assumed the relay was deployed with (i) Decode-and-Forward (DF), (ii) Amplify-and-Forward (AF) with Fixed Gain (FG) and (iii) AF with a Variable Gain (VG) protocols to improve system performance over the first scenario. In scenario (iii), we investigated an amplify coefficient based on the maximum of instantaneous CSI and obtained the Outage Probability (OP) in novel closed form. The analytical results showed that although the Base Station (BS) sent information and energy at the same instant, the OP performance at the relay was sufficient due to assistance from multi-antennas and the TAS protocol. However, the OP performance at the user under cooperation with a relay using the AF-VG protocol achieved better system performance than the DF and AF-FG protocols. We proved and verified the analytical results with Monte Carlo simulations.

在这项研究中，我们研究了新兴的多输入多输出（MIMO）非正交多址（NOMA）网络，该网络结合了发射天线选择（TAS）和同时进行的无线信息和功率传输（SWIPT）协议。设计了预编码通道矩阵以辅助TAS协议。我们部署了强大的用户作为中继，以帮助弱小的用户。研究了三种协作式MIMO-NOMA网络场景。在第一种情况下，我们假设中继器部署有（i）解码转发（DF），（ii）具有固定增益（FG）的放大转发（AF）和（iii）具有可变增益的AF （VG）协议来改善第一种情况下的系统性能。在方案（iii）中，我们研究了基于瞬时CSI最大值的放大系数，并以新颖的封闭形式获得了停机概率（OP）。分析结果表明，尽管基站（BS）在同一时刻发送信息和能量，但由于多天线和TAS协议的辅助，中继站的OP性能是足够的。但是，与使用AF-VG协议的中继配合使用时，用户的OP性能比DF和AF-FG协议更好的系统性能。我们用蒙特卡洛模拟证明并验证了分析结果。