Research Article
Energy Efficiency Optimization for Plane Spiral OAM Mode-Group Based MIMO-NOMA Systems
@INPROCEEDINGS{10.1007/978-3-030-90196-7_16, author={Jie Tang and Yan Song and Chuting Lin and Wanmei Feng and Zhen Chen and Xiuying Zhang and Kai-kit Wong}, title={Energy Efficiency Optimization for Plane Spiral OAM Mode-Group Based MIMO-NOMA Systems}, proceedings={Artificial Intelligence for Communications and Networks. Third EAI International Conference, AICON 2021, Xining, China, October 23--24, 2021, Proceedings, Part I}, proceedings_a={AICON}, year={2021}, month={11}, keywords={Energy efficiency (EE) Plane spiral orbital angular momentum (PSOAM) Non-orthogonal multiple access (NOMA)}, doi={10.1007/978-3-030-90196-7_16} }- Jie Tang
Yan Song
Chuting Lin
Wanmei Feng
Zhen Chen
Xiuying Zhang
Kai-kit Wong
Year: 2021
Energy Efficiency Optimization for Plane Spiral OAM Mode-Group Based MIMO-NOMA Systems
AICON
Springer
DOI: 10.1007/978-3-030-90196-7_16
Abstract
In this paper, a plane spiral orbital angular momentum (PS-OAM) mode-groups (MGs) based multi-user multiple-input-multiple-out-put (MIMO) non-orthogonal multiple access (NOMA) system is studied, where a base station (BS) transmits date to multiple users by utilizing the generated PSOAM beams. For such scenario, the interference between users in different PSOAM-mode groups can be avoided, which leads to a significant performance enhancement. We aim to maximize the energy efficiency (EE) of the system subject to the total transmission power constraint and the minimum rate constraint. This design problem is non-convex by optimizing the power allocation, and thus is quite difficult to tackle directly. To solve this issue, we present a bisection-based power allocation algorithm where the bisection method is exploited in the outer layer to obtain the optimal EE and a power distributed iterative algorithm is exploited in the inner layer to optimize the transmit power. Simulation results validate the theoretical findings and demonstrate the proposed system can achieve better performance than the traditional multi-user MIMO system in terms of EE.
