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)


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
Issue number3
Publication statusPublished - 2019 Sept


  • 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


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