Joint wireless information and energy transfer in a K-user MIMO interference channel

Jaehyun Park, Bruno Clerckx

    Research output: Contribution to journalArticlepeer-review

    117 Citations (Scopus)

    Abstract

    Recently, joint wireless information and energy transfer (JWIET) methods have been proposed to relieve the battery limitation of wireless devices. However, the JWIET in a general K-user MIMO interference channel (IFC) has been unexplored so far. In this paper, we investigate for the first time the JWIET in K-user MIMO IFC, in which receivers either decode the incoming information data (information decoding, ID) or harvest the RF energy (energy harvesting, EH). In the K-user IFC, we consider three different scenarios according to the receiver mode: i) multiple EH receivers and a single ID receiver, ii) multiple IDs and a single EH, and iii) multiple IDs and multiple EHs. For all scenarios, we have found a common necessary condition of the optimal transmission strategy and, accordingly, developed the transmission strategy that satisfies the common necessary condition, in which all the transmitters transferring energy exploit a rank-one energy beamforming. Furthermore, we have also proposed an iterative algorithm to optimize the covariance matrices of the transmitters that transfer information and the powers of the energy beamforming transmitters simultaneously, and identified the corresponding achievable rate-energy tradeoff region. Finally, we have shown that by selecting EH receivers according to their signal-to-leakage-and-harvested energy-ratio (SLER), we can improve the achievable rate-energy region further.

    Original languageEnglish
    Article number2341233
    Pages (from-to)5781-5796
    Number of pages16
    JournalIEEE Transactions on Wireless Communications
    Volume13
    Issue number10
    DOIs
    Publication statusPublished - 2014 Oct 1

    Bibliographical note

    Publisher Copyright:
    © 2014 IEEE.

    Keywords

    • Joint wireless information and energy transfer
    • K-user MIMO interference channel
    • Rank-one beamforming

    ASJC Scopus subject areas

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

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