Low complexity energy efficient random access scheme for the asynchronous fading MAC

Kirill Andreev, Suhas S. Kowshik, Alexey Frolov, Yury Polyanskiy

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

    7 Citations (Scopus)

    Abstract

    We investigate the problem of uncoordinated massive random access in the quasi-static asynchronous Rayleigh fading channel. In the previous work [1], the authors assumed a completely synchronous scenario which is impossible in any practical implementation. This paper extends the previous work to the asynchronous case. As energy efficiency is of critical importance for massive machine-type communication (mMTC), our main goal is to minimize the energy-per-bit required to achieve the target probability of error. Another issue required for mMTC is a transmitter simplicity. As in the synchronous case, we focus on grant-free transmission and do not use preambles and other synchronization sequences. We propose a practical implementation of a transmission scheme based on synchronization error estimation and cancellation in the frequency domain. The simulation shows that the proposed transmission scheme's performance is very close to the synchronous case. The only source of E_b/N_0 loss is the need for an additional cyclic prefix that helps to solve the synchronization error cancellation problem in the frequency domain.

    Original languageEnglish
    Title of host publication2019 IEEE 90th Vehicular Technology Conference, VTC 2019 Fall - Proceedings
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    ISBN (Electronic)9781728112206
    DOIs
    Publication statusPublished - Sep 2019
    Event90th IEEE Vehicular Technology Conference, VTC 2019 Fall - Honolulu, United States
    Duration: 22 Sep 201925 Sep 2019

    Publication series

    NameIEEE Vehicular Technology Conference
    Volume2019-September
    ISSN (Print)1550-2252

    Conference

    Conference90th IEEE Vehicular Technology Conference, VTC 2019 Fall
    Country/TerritoryUnited States
    CityHonolulu
    Period22/09/1925/09/19

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