Robust beamforming for SWIPT systems with non-linear energy harvesting model

Elena Boshkovska, Alexander Koelpin, Derrick Wing Kwan Ng, Nikola Zlatanov, Robert Schober

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31 Citations (Scopus)

Abstract

This paper investigates resource allocation for simultaneous wireless information and power transfer (SWIPT) downlink systems based on a non-linear energy harvesting model. The resource allocation algorithm design is formulated as a non-convex optimization problem for the maximization of the total harvested power. The proposed problem formulation not only takes into account imperfect channel state information (CSI) but also guarantees the quality-of-service (QoS) of information transfer. A novel iterative algorithm is proposed to obtain the globally optimal solution of the considered non-convex optimization problem. In each iteration, a rank-constrained semidefinite program (SDP) is solved optimally by SDP relaxation. Simulation results demonstrate the significant gains in harvested power and the robustness against CSI imperfection for the proposed optimal resource allocation, compared to a baseline scheme designed for perfect CSI and the conventional linear energy harvesting model.

Original languageEnglish
Title of host publicationSPAWC 2016 - 17th IEEE International Workshop on Signal Processing Advances in Wireless Communications
Subtitle of host publicationJuly 3rd - July 6th, Edinburgh, UK
EditorsTharm Ratnarajah, Constantinos Papadias
PublisherIEEE, Institute of Electrical and Electronics Engineers
Number of pages5
ISBN (Electronic)9781509017492
ISBN (Print)9781509017508
DOIs
Publication statusPublished - 9 Aug 2016
EventIEEE International Workshop on Signal Processing Advances in Wireless Communications 2016 - Edinburgh, United Kingdom
Duration: 3 Jul 20166 Jul 2016
Conference number: 17th
https://ieeexplore.ieee.org/xpl/conhome/7530389/proceeding (Proceedings)

Conference

ConferenceIEEE International Workshop on Signal Processing Advances in Wireless Communications 2016
Abbreviated titleSPAWC 2016
Country/TerritoryUnited Kingdom
CityEdinburgh
Period3/07/166/07/16
Internet address

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