Asynchronous Designs for Multiuser MIMO Wireless Powered Communication Networks

Hoon Lee, Hanjin Kim, Kyoung Jae Lee, Inkyu Lee

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

This paper considers multiuser multiple-input multiple-output (MIMO) wireless powered communication networks (WPCNs). In this system, a multiantenna power beacon (PB) transfers wireless energy to several multiantenna users, and then the users transmit data to a multiantenna base station. Time durations for the energy harvesting (EH) operations at each user can be differently set based on the users' channel conditions, which results in an asynchronous protocol on the EH and the information transmission. We maximize the sum rate performance of the asynchronous WPCN by jointly optimizing the energy precoding matrices at the PB, the information precoding matrices, and the EH time durations at the users. By using convex optimization techniques, the optimal algorithm for the sum rate maximization problem is provided with analytical expressions of the optimal precoding matrices. Simulation results verify that the proposed optimal algorithm outperforms conventional schemes.

Original languageEnglish
Article number8357530
Pages (from-to)2420-2430
Number of pages11
JournalIEEE Systems Journal
Volume13
Issue number3
DOIs
Publication statusPublished - 2019 Sept

Bibliographical note

Funding Information:
Manuscript received January 12, 2018; revised March 21, 2018; accepted April 8, 2018. Date of publication May 10, 2018; date of current version August 23, 2019. This work was supported by the National Research Foundation through the Ministry of Science, ICT, and Future Planning (MSIP), Korean Government under Grant 2017R1A2B3012316. The work of K.-J. Lee was supported by Korea Evaluation Institute of Industrial Technology grant funded by the Korean Government (MOTIE) (No. 10079984, Development of nonbinding multimodal wireless power transfer technology for wearable device). (Corresponding author: Inkyu Lee.) H. Lee was with the School of Electrical Engineering, Korea University, Seoul 02841, South Korea. He is now with the Information Systems Technology and Design Pillar, Singapore University of Technology and Design, Singapore 487372 (e-mail:,hoon_lee@sutd.edu.sg).

Funding Information:
This work was supported by the National Research Foundation through the Ministry of Science, ICT, and Future Planning (MSIP), Korean Government under Grant 2017R1A2B3012316.

Publisher Copyright:
© 2007-2012 IEEE.

Keywords

  • Multiple-input multiple-output (MIMO)
  • wireless energy transfer (WET)
  • wireless powered communication networks (WPCNs)

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Information Systems
  • Computer Science Applications
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'Asynchronous Designs for Multiuser MIMO Wireless Powered Communication Networks'. Together they form a unique fingerprint.

Cite this