Backscatter Communications with NOMA (Invited Paper)

Jing Guo, Xiangyun Zhou, Salman Durrani, Halim Yanikomeroglu

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

    11 Citations (Scopus)

    Abstract

    In this paper, we study a multiple access monostatic backscatter communication (BackCom) system, where one reader talks to multiple backscatter nodes (BNs). We propose to use non- orthogonal multiple access (NOMA) to improve the efficiency of BackCom system. Specifically, the reader uses the feedback signal during the training phase to separate the multiple BNs into two groups. The reader then randomly pairs the BNs from these two groups to implement NOMA. We propose to set the reflection coefficients for these two groups differently to further distinguish the reflected signal power for the paired BNs. To characterize the network performance, we derive an analytical expression for the success rate which shows the percentage of bits that can be successfully decoded in one time slot. We also present the design guideline of the reflection coefficients for the two groups to maximize the system performance. Our numerical results show that increasing the readers transmit power has little impact on the system performance when the channel condition on the transmission link is less severe. Instead, the proper choice of the reflection coefficients for the two groups of BNs can greatly enhance the BackCom system.

    Original languageEnglish
    Title of host publication2018 15th International Symposium on Wireless Communication Systems, ISWCS 2018
    PublisherVDE VERLAG GMBH
    ISBN (Electronic)9781538650059
    DOIs
    Publication statusPublished - 12 Oct 2018
    Event15th International Symposium on Wireless Communication Systems, ISWCS 2018 - Lisbon, Portugal
    Duration: 28 Aug 201831 Aug 2018

    Publication series

    NameProceedings of the International Symposium on Wireless Communication Systems
    Volume2018-August
    ISSN (Print)2154-0217
    ISSN (Electronic)2154-0225

    Conference

    Conference15th International Symposium on Wireless Communication Systems, ISWCS 2018
    Country/TerritoryPortugal
    CityLisbon
    Period28/08/1831/08/18

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