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- Title
IRS 辅助的SWIPT 系统中基于能效优先的 波束成形设计与优化.
- Authors
许晓荣; 朱薇薇; 包建荣; 朱卫平; 冯维; 姚英彪
- Abstract
Intelligent reflecting surface (IRS)-assisted simultaneous wireless information and power transfer (SWIPT) system is set as research background. Joint design and optimization of energy-efficiency priority based active beamforming at multi-antenna transmitter and passive beamforming at IRS were investigated. The optimization objective was to maximize minimum energy-efficiency, which was subject to transmitter power control, energy constraint at energy harvesting (EH) receiver and IRS phase shift constraint. Alternating direction method of multipliers (ADMM) was implemented to solve this non-linear non-convex optimization problem. Firstly, the fraction objective function was transformed via Dinkelbach's approach. Singular value decomposition (SVD) and semi-definite relaxation (SDR) were applied to obtain active beam forming vector at transmitter. Simulation results indicate that, IRS assisted SWIPT could significantly reduce energy threshold at EH receiver. The achievable energy-efficiency of the proposed strategy is 300 KB/J when total circuit power consumption is -15 dBm. Maximum energy-efficiency can be achieved with the maximum numbers of passive reflecting elements and transmitter antennas.
- Publication
Telecommunications Science, 2022, Vol 38, Issue 1, p36
- ISSN
1000-0801
- Publication type
Article
- DOI
10.11959/j.issn.1000-0801.2022001