论文标题
通过同时进行三角形的下行链路模拟物的预编码器设计和功率分配
Precoder Design and Power Allocation for Downlink MIMO-NOMA via Simultaneous Triangularization
论文作者
论文摘要
在本文中，我们考虑了两用户功率域多输入多输出（MIMO）非正交多访问（NOMA）系统的下行链路预编码器设计。所提出的预编码方案基于同时进行三角形化，并将两个用户的Mimo-Noma通道分解为多个单单输入单输出Noma通道，假设用户对用户的低复杂性自我解释取消。与基于同时对角线化（SD）的预编码方案相反，所提出的方案避免反转用户的MIMO通道，从而增强了麦迪速率的性能。此外，我们基于凸 - 凸法程序开发了功率分配算法，并利用它以获得所提出的MIMO-NOMA方案的千古可达到的速率区域。我们的结果表明，所提出的方案的表现优于基线预编码方案，基于SD和正交多重访问，用于广泛的用户速率，并且在肮脏的纸质编码上限附近执行。基于提议的MIMO-NOMA方案和点对点MIMO之间的时间共享，可以通过使用混合方案来进一步改善阵尾率区域。
In this paper, we consider the downlink precoder design for two-user power-domain multiple-input multiple-output (MIMO) non-orthogonal multiple access (NOMA) systems. The proposed precoding scheme is based on simultaneous triangularization and decomposes the MIMO-NOMA channels of the two users into multiple single-input single-output NOMA channels, assuming low-complexity self-interference cancellation at the users. In contrast to the precoding schemes based on simultaneous diagonalization (SD), the proposed scheme avoids inverting the MIMO channels of the users, thereby enhancing the ergodic rate performance. Furthermore, we develop a power allocation algorithm based on the convex-concave procedure, and exploit it to obtain the ergodic achievable rate region of the proposed MIMO-NOMA scheme. Our results illustrate that the proposed scheme outperforms baseline precoding schemes based on SD and orthogonal multiple access for a wide range of user rates and performs close to the dirty paper coding upper bound. The ergodic rate region can further be improved by utilizing a hybrid scheme based on time sharing between the proposed MIMO-NOMA scheme and point-to-point MIMO.
