Research Article
Energy-Efficient Optimization for Joint Design of Power Allocation and Beamforming in Downlink mmWave Communication Systems with NOMA
@INPROCEEDINGS{10.1007/978-3-030-89814-4_18, author={Jiali Cai and Xiangbin Yu and Xu Huang and Cuimin Pan}, title={Energy-Efficient Optimization for Joint Design of Power Allocation and Beamforming in Downlink mmWave Communication Systems with NOMA}, proceedings={Mobile Multimedia Communications. 14th EAI International Conference, Mobimedia 2021, Virtual Event, July 23-25, 2021, Proceedings}, proceedings_a={MOBIMEDIA}, year={2021}, month={11}, keywords={Millimeter-wave Non-orthogonal multiple access Imperfect channel state information Energy efficiency Power allocation Beamforming}, doi={10.1007/978-3-030-89814-4_18} }- Jiali Cai
Xiangbin Yu
Xu Huang
Cuimin Pan
Year: 2021
Energy-Efficient Optimization for Joint Design of Power Allocation and Beamforming in Downlink mmWave Communication Systems with NOMA
MOBIMEDIA
Springer
DOI: 10.1007/978-3-030-89814-4_18
Abstract
In this paper, we develop two energy-efficient joint power allocation (PA) and beamforming (BF) design schemes for a two-user downlink millimeter-wave system with non-orthogonal multiple access under imperfect channel state information. The optimization problem is formulated by considering the maximum power and minimum rate constraints. Specifically, by means of block coordinate descent algorithm, the problem is transformed into two sub-problems: PA problem and BF problem. First, we derive a closed-form optimal PA solution for each iteration of concave-convex procedure so as to obtain a suboptimal PA scheme for the fixed BF. With this PA scheme, two suboptimal BF schemes are proposed based on successive convex approximation and one-dimensional search method, respectively. Simulation results validate the rational of two proposed schemes and show that the former scheme can achieve higher energy efficiency while the latter has small performance loss but lower complexity .
