In this paper, we intend to study the energy efficiency (EE) optimization for a simultaneous wireless information and power transfer (SWIPT)-based distributed antenna system (DAS). Firstly, a DAS-SWIPT model is formulated, whose goal is to maximize the EE of the system. Next, we propose an optimal resource allocation method by means of the Karush-Kuhn-Tucker condition as well as an ergodic method. Considering the complexity of the ergodic method, a suboptimal scheme with lower complexity is proposed by using an antenna selection scheme. Numerical results illustrate that our suboptimal method is able to achieve satisfactory performance of EE similar to an optimal one while reducing the calculation complexity.
|Number of pages||22|
|Journal||KSII Transactions on Internet and Information Systems|
|Publication status||Published - 28 Feb 2021|
Bibliographical noteFunding Information:
This work is supported in part by Natural Science Research Projects in Jiangsu Higher Education Institutions (18KJB510018), On-Job Training Doctoral Research Fund of Nanjing Institute of Technology (ZKJ201904), and National Natural Science Foundation of China (61571225).
Copyright © 2021 KSII
Copyright 2021 Elsevier B.V., All rights reserved.
- Antenna Selection
- Distributed Antenna System
- Energy Efficiency
- Low Complexity
- Power Transfer
- Simultaneous Wireless Information
ASJC Scopus subject areas
- Information Systems
- Computer Networks and Communications