SWIPT with practical modulation and RF energy harvesting sensitivity

Wanchun Liu, Xiangyun Zhou, Salman Durrani, Petar Popovski

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    43 Citations (Scopus)

    Abstract

    In this paper, we investigate the performance of simultaneous wireless information and power transfer (SWIPT) in a point-to-point system, adopting practical M-ary modulation. We take into account the fact that the receiver's radio-frequency (RF) energy harvesting circuit can only harvest energy when the received signal power is greater than a certain sensitivity level. For both power-splitting (PS) and time-switching (TS) schemes, we derive the energy harvesting performance as well as the information decoding performance for the Nakagami-m fading channel. We also analyze the performance tradeoff between energy harvesting and information decoding by studying an optimization problem, which maximizes the information decoding performance and satisfies a constraint on the minimum harvested energy. Our analysis shows that (i) for the PS scheme, modulations with high peak-to-average power ratio achieve better energy harvesting performance, (ii) for the TS scheme, it is desirable to concentrate the power for wireless power transfer in order to minimize the non-harvested energy caused by the RF energy harvesting sensitivity level, and (iii) channel fading is beneficial for energy harvesting in both PS and TS schemes.

    Original languageEnglish
    Title of host publication2016 IEEE International Conference on Communications, ICC 2016
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    ISBN (Electronic)9781479966646
    DOIs
    Publication statusPublished - 12 Jul 2016
    Event2016 IEEE International Conference on Communications, ICC 2016 - Kuala Lumpur, Malaysia
    Duration: 22 May 201627 May 2016

    Publication series

    Name2016 IEEE International Conference on Communications, ICC 2016

    Conference

    Conference2016 IEEE International Conference on Communications, ICC 2016
    Country/TerritoryMalaysia
    CityKuala Lumpur
    Period22/05/1627/05/16

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