Modeling and analysis of self-interference impaired two-user cooperative MIMO-NOMA system
Modeling and analysis of self-interference impaired two-user cooperative MIMO-NOMA system
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DOI：
10.1016/j.phycom.2021.101441
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发表时间：
2021-08-24
影响因子：
2.2
通讯作者：
Abbas, Ghulam
中科院分区：
文献类型：
--
作者：
Ghous, Mujtaba;Hassan, Ahmad Kamal;Abbas, Ghulam
在这项工作中，我们处理与预编码器和均衡器的设计在两个用户的合作多输入多输出非正交多址（MIMO-NOMA）系统的小区边缘用户的性能分析。在MIMO-NOMA系统中，数据速率公平性和小区边缘用户的中断性能是至关重要的问题。为此，功率分配的系数更新的波束形成器的帮助下，通过利用同时无线信息和功率传输（SWIPT）协议。特别地，在小区中心的用户扮演中继的角色以帮助小区边缘用户，并且中继操作由混合时间切换/功率分配SWIPT协议供电。为此，首先，我们制定的信号与干扰加噪声比的下行MIMO-NOMA系统，考虑不同的相关矩阵的不定特征值，利用二次制定存在自干扰和多用户干扰。接下来，中断概率的封闭形式的表达式推导出基于在发射机侧的接收和发送相关矩阵的知识。通过仿真验证了解析表达式的正确性。我们展示的程度，通过使用天线分集在近端和远端终端的MIMO-NOMA系统的小区边缘用户的中断性能得到改善。(C)2021爱思唯尔有限公司版权所有。
In this work we deal with the performance analysis of a cell-edge user with the precoder and equalizer design in a two-user cooperative multiple-input multiple-output non-orthogonal multiple access (MIMO-NOMA) system. Since the data rate fairness and outage performance of cell-edge user are crucial issues in MIMO-NOMA systems, we emphasize on how to sort out these issues. To this end, the coefficients of power allocation are updated with the help of beamformers by utilizing the simultaneous wireless information and power transfer (SWIPT) protocol. Particularly, a user at the cell-center plays the role of a relay to help the cell-edge user and the relaying operation is powered by a hybrid time switching/power splitting SWIPT protocol. For this purpose, first we formulate the signal to-interference-plus noise ratio of downlink MIMO-NOMA system by considering distinct correlation matrices in term of indefinite eigenvalues by utilizing a quadratic formulation in the presence of both self-interference and multi-user interference. Next, a closed-form expression of the outage probability is derived based on the knowledge of receive and transmit correlation matrices at the transmitter side. The analytical expressions are validated through simulations to affirm the accuracy of our analysis. We showcase the extent by which the cell-edge user's outage performance is improved by using the antenna diversity at near and far end terminals of the MIMO-NOMA system. (C) 2021 Elsevier B.V. All rights reserved.