Iterative Decoders for FTN-based NOMA Scheme to Multiplex Sporadic and Broadband Transmission

Ameha T. Abebe, Chung Gu Kang

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    3 Citations (Scopus)

    Abstract

    The concept of faster-than Nyquist transmission (FTN) is employed in [1] as a non-orthogonal multiple access scheme to multiplex a sporadic and broadband uplink transmissions so that radio resources can be efficiently shared beyond the Nyquist rate by both traffic types. A broadband user, transmitting in multiple-input multiple-output (MIMO) mode, turns off some of the transmit antennas on few subcarriers to allow sporadic traffic users to use the radio resources. Turning off some transmit antennas on a set of subcarriers from a broadband transmission marginally penalize the broadband transmission in terms of bit-error rate (BER). Frequency-domain linear minimum mean squared error (LMMSE) turbo equalization is shown to have a decent performance in terms of BER. In this paper, we investigate a belief propagation algorithm namely the generalized approximate message passing (GAMP) algorithm and its performance in the FTN-based NOMA setting. For example, we have shown that while employing GAMP-based equalization, turning-off 2 out of 8 antennas from 32 subcarriers of a 256 block length broadband transmission costs only 0.1dB transmit power per bit as compared to 0.3dB for linear MMSE-based equalizer.

    Original languageEnglish
    Title of host publication9th International Conference on Information and Communication Technology Convergence
    Subtitle of host publicationICT Convergence Powered by Smart Intelligence, ICTC 2018
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages813-817
    Number of pages5
    ISBN (Electronic)9781538650400
    DOIs
    Publication statusPublished - 2018 Nov 16
    Event9th International Conference on Information and Communication Technology Convergence, ICTC 2018 - Jeju Island, Korea, Republic of
    Duration: 2018 Oct 172018 Oct 19

    Other

    Other9th International Conference on Information and Communication Technology Convergence, ICTC 2018
    Country/TerritoryKorea, Republic of
    CityJeju Island
    Period18/10/1718/10/19

    Keywords

    • Coexistance
    • Faster-than-nyquist
    • Machine-type Communication
    • MIMO
    • NOMA
    • Single Carrier (SC)

    ASJC Scopus subject areas

    • Computer Networks and Communications
    • Computer Science Applications
    • Information Systems
    • Information Systems and Management
    • Artificial Intelligence

    Fingerprint

    Dive into the research topics of 'Iterative Decoders for FTN-based NOMA Scheme to Multiplex Sporadic and Broadband Transmission'. Together they form a unique fingerprint.

    Cite this