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

2 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
CountryKorea, 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

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    Abebe, A. T., & Kang, C. G. (2018). Iterative Decoders for FTN-based NOMA Scheme to Multiplex Sporadic and Broadband Transmission. In 9th International Conference on Information and Communication Technology Convergence: ICT Convergence Powered by Smart Intelligence, ICTC 2018 (pp. 813-817). [8539454] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICTC.2018.8539454