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

2021 Fiscal Year Final Research Report

• Project/Area Number: 20K22410
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0302:Electrical and electronic engineering and related fields
• Research Institution: The 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
• Keywords: FTN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

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.

Free Research Field

通信工学

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。