Joint Beamforming design for multi-user wireless information and power transfer

Hyukmin Son, Bruno Clercks

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

In this paper, we propose a joint beamforming algorithm for a multiuser wireless information and power transfer (MU-WIPT) system that is compatible with the conventional multiuser multiple input multiple output (MU-MIMO) system. The proposed joint beamforming vectors are initialized using the well established MU-MIMO zero-forcing beamforming (ZFBF) and are further updated to maximize the total harvested energy of energy harvesting (EH) users and guarantee the signal to interference plus noise ratio (SINR) constraints of the co-scheduled information decoding (ID) users. When ID and EH users are simultaneously served by joint beamforming vectors, the harvested energy can be increased at the cost of an SINR loss for ID users. To characterize the SINR loss, the target SINR ratio \mu is introduced as the target SINR (i.e., SINR constraint) normalized by the received SINR achievable with ZFBF. Based on that ratio, the sum rate and harvested energy obtained from the proposed algorithm are analyzed under perfect/imperfect channel state information at the transmitter (CSIT). Through simulations and numerical results, we validate the derived analyses and demonstrate the EH and ID performance compared to both state of the art and conventional schemes.

Original languageEnglish
Article number6880422
Pages (from-to)6397-6409
Number of pages13
JournalIEEE Transactions on Wireless Communications
Volume13
Issue number11
DOIs
Publication statusPublished - 2014 Nov 1

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Beamforming
Decoding
Energy harvesting
Interference
Energy Harvesting
Zero-forcing
Channel state information
Transmitters
Energy
Signal to noise ratio
Design
Target
Multiple-input multiple-output (MIMO) Systems
Channel State Information
Multiple-input multiple-output (MIMO)
Imperfect
Transmitter
Maximise
Numerical Results

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Applied Mathematics

Cite this

Joint Beamforming design for multi-user wireless information and power transfer. / Son, Hyukmin; Clercks, Bruno.

In: IEEE Transactions on Wireless Communications, Vol. 13, No. 11, 6880422, 01.11.2014, p. 6397-6409.

Research output: Contribution to journalArticle

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