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Faster-than-Nyquist signaling with power allocation in frequency-selective fading channel

Research Project

Project/Area Number 20K22410
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 0302:Electrical and electronic engineering and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Ishihara Takumi  東京大学, 生産技術研究所, 特任研究員 (60881513)

Project Period (FY) 2020-09-11 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
KeywordsFTN伝送 / ナイキスト基準 / 電力配分 / 広帯域フェージング伝搬路 / 無線通信 / faster-than-Nyquist信号伝送 / FTN / 情報理論 / Faster-than-Nyquist / FTN signaling / FTN信号伝送 / power allocation / 広帯域通信
Outline of Research at the Start

ナイキスト基準に基づいた既存の多くの無線通信システムに対して高い周波数利用効率を実現しうる技術として、faster-than-Nyquist (FTN) 信号伝送が知られている。しかしながら、FTN伝送では特有の信号間干渉が性能向上を阻害するため、従来のFTN伝送方式では大幅な通信高速化は困難であることがわかっている。これに対して本研究では、受信信号レベルが変動するフェージング伝搬路において既存方式を上回る高速なFTN伝送システムを確立することを目指す。特に、大容量FTN伝送を実現するためには、従来研究で重視されてきた受信機設計に加えて、適切な送信機設計が不可欠であることを示す。

Outline of Final Research Achievements

In this study, we proposed a novel faster-than-Nyquist (FTN) signaling transceiver, where FTN signaling is a non-orthogonal information transmission scheme that is capable of achieving a higher spectral efficiency than conventional Nyquist signaling when the same root-raised cosine (RRC) shaping filter is employed. More specifically, we proposed FTN signaling with power allocation in a frequency-selective fading channel. Our proposed FTN signaling transceiver employing an RRC shaping filter is capable of achieving a spectral efficiency close to the ideal rectangular-filter-based upper bound.

Academic Significance and Societal Importance of the Research Achievements

本研究は、faster-than-Nyquist (FTN) 信号のシンボル電力係数を適切に制御することにより、広帯域フェージング伝搬路において、実用的なroot raised cosine (RRC) 帯域制限フィルタを用いながら、理想的な矩形の帯域制限フィルタを用いた場合に迫る周波数利用効率を達成可能になることを初めて理論解析および数値解析の両面から示すものである。FTN伝送は原理上多様な通信シナリオに適用可能であるため、情報通信分野の様々な領域に本研究成果を応用することが可能である。

Report

(3 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • Research Products

    (12 results)

All 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 3 results) Presentation (6 results) (of which Int'l Joint Research: 3 results) Remarks (2 results)

  • [Int'l Joint Research] University of Southampton(英国)

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Reduced-Complexity FFT-Spread Multicarrier Faster-Than-Nyquist Signaling in Frequency-Selective Fading Channel2022

    • Author(s)
      Ishihara Takumi、Sugiura Shinya
    • Journal Title

      IEEE Open Journal of the Communications Society

      Volume: 3 Pages: 530-542

    • DOI

      10.1109/ojcoms.2022.3160721

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Eigendecomposition-Precoded Faster-Than-Nyquist Signaling With Optimal Power Allocation in Frequency-Selective Fading Channels2022

    • Author(s)
      Ishihara Takumi、Sugiura Shinya
    • Journal Title

      IEEE Transactions on Wireless Communications

      Volume: 21 Issue: 3 Pages: 1681-1693

    • DOI

      10.1109/twc.2021.3106098

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] The Evolution of Faster-Than-Nyquist Signaling2021

    • Author(s)
      Ishihara Takumi、Sugiura Shinya、Hanzo Lajos
    • Journal Title

      IEEE Access

      Volume: 9 Pages: 86535-86564

    • DOI

      10.1109/access.2021.3088997

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] FFT-spread faster-than-Nyquist signaling in frequency-selective fading channel2022

    • Author(s)
      Ishihara Takumi、Sugiura Shinya
    • Organizer
      IEEE International Conference on Communications
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] FFTに基づく低演算事前符号化FTNに関する一検討2022

    • Author(s)
      石原拓実、杉浦慎哉
    • Organizer
      電子情報通信学会総合大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Precoded faster-than-Nyquist signaling with optimal power allocation in frequency-selective channel2021

    • Author(s)
      Ishihara Takumi、Sugiura Shinya
    • Organizer
      IEEE International Conference on Communications Workshops (ICC Workshops)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 周波数選択性フェージング伝搬路におけるFTN信号伝送の最適電力配分2021

    • Author(s)
      石原拓実、杉浦慎哉
    • Organizer
      電子情報通信学会ソサイエティ大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 固有値分解を利用したFTN伝送のプリコーディングと相互情報量の最大化2021

    • Author(s)
      石原拓実、杉浦慎哉
    • Organizer
      電子情報通信学会総合大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Precoded faster-than-Nyquist signaling with optimal power allocation in frequency-selective channel2021

    • Author(s)
      Takumi Ishihara
    • Organizer
      IEEE International Conference on Communications Workshops
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Remarks] 石原拓実個人webページ

    • URL

      https://sites.google.com/view/t-ishihara

    • Related Report
      2021 Annual Research Report
  • [Remarks] 東京大学杉浦慎哉研究室webページ

    • URL

      http://sgurlab.iis.u-tokyo.ac.jp/index.html

    • Related Report
      2021 Annual Research Report

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Published: 2020-09-29   Modified: 2023-01-30  

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