ISHIKAWA Naoki 石川直樹

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Ishikawa Naoki 石川直樹

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Researcher Number	00801713
Other IDs
Affiliation (Current)	2025: 横浜国立大学, 大学院工学研究院, 准教授
Affiliation (based on the past Project Information) *help	2020 – 2024: 横浜国立大学, 大学院工学研究院, 准教授 2023: 横浜国立大学, 工学(系)研究科(研究院), 准教授 2017 – 2019: 広島市立大学, 情報科学研究科, 助教
Review Section/Research Field	Principal Investigator Basic Section 21020:Communication and network engineering-related / Communication/Network engineering Except Principal Investigator Basic Section 21060:Electron device and electronic equipment-related
Keywords	Principal Investigator 無線通信 / 量子計算 / インデックス変調 / 空間変調 / 非同期検出 / 差動符号化 / 情報理論 / 大規模アンテナアレイ / 二次加速 / 量子回路 … More / 最尤検出 / 周波数ホッピング / 無線秘匿通信 / オープンデータ / 遅延検波 / 秘密容量 / カオス理論 / 物理層セキュリティ / 情報通信工学 / 移動体通信 / 広帯域通信 / 非正方射影 / 順列変調 … More Except Principal Investigator 乱数生成 / 無線信号処理 / 単一磁束量子回路 / 超伝導回路 / ストカスティック演算 / 確率的演算 Less

無線誤り訂正を加速する量子最適化技術の開発Principal Investigator
- Principal Investigator
  
  石川直樹
- Project Period (FY)
  2024 – 2026
- Research Category
  
  Fund for the Promotion of Joint International Research (Fostering Joint International Research)
- Review Section
  
  Basic Section 21020:Communication and network engineering-related
- Research Institution
  Yokohama National University
無線通信の高速大容量化を加速する量子最適化Principal Investigator
- Principal Investigator
  
  石川直樹
- Project Period (FY)
  2022 – 2025
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Review Section
  
  Basic Section 21020:Communication and network engineering-related
- Research Institution
  Yokohama National University
Study on superconductor circuits with ultra-high power efficiency by introducing stochastic operation
- Principal Investigator
  
  山梨裕希
- Project Period (FY)
  2022 – 2024
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Review Section
  
  Basic Section 21060:Electron device and electronic equipment-related
- Research Institution
  Yokohama National University
Differential-encoding aided physical-layer securityPrincipal Investigator
- Principal Investigator
  
  Ishikawa Naoki
- Project Period (FY)
  2019 – 2021
- Research Category
  
  Grant-in-Aid for Early-Career Scientists
- Review Section
  
  Basic Section 21020:Communication and network engineering-related
- Research Institution
  Yokohama National University
  Hiroshima City University
A study on nonsquare differential space-time coding for massive MIMO-OFDM communicationsPrincipal Investigator
- Principal Investigator
  
  Ishikawa Naoki
- Project Period (FY)
  2017 – 2018
- Research Category
  
  Grant-in-Aid for Research Activity Start-up
- Research Field
  
  Communication/Network engineering
- Research Institution
  Hiroshima City University

All 2024 2023 2022 2021 2020 2019 2018 2017

All Journal Article Presentation

[Journal Article] Accelerating Grover adaptive search: Qubit and gate count reduction strategies with higher-order formulations2024
- Author(s)
  Yuki Sano, Kosuke Mitarai, Naoki Yamamoto, Naoki Ishikawa
- Journal Title
  
  IEEE Transactions on Quantum Engineering, in press
  
  Volume: -
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-23K22755
[Journal Article] Qubit reduction and quantum speedup for wireless channel assignment problem2023
- Author(s)
  Yuki Sano, Masaya Norimoto, Naoki Ishikawa
- Journal Title
  
  IEEE Transactions on Quantum Engineering
  
  Volume: 4 Pages: 1-12
- DOI
  10.1109/tqe.2023.3293452
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-23K22755
[Journal Article] Quantum Algorithm for Higher-Order Unconstrained Binary Optimization and MIMO Maximum Likelihood Detection2022
- Author(s)
  Masaya Norimoto, Ryuhei Mori, and Naoki Ishikawa
- Journal Title
  
  IEEE Transactions on Communications
  
  Volume: 71 Issue: 4 Pages: 1926-1939
- DOI
  10.1109/tcomm.2023.3244924
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-17K17711, KAKENHI-PROJECT-23K22755, KAKENHI-PROJECT-20H04138, KAKENHI-PLANNED-20H05966, KAKENHI-PROJECT-22H00522
[Journal Article] Error probability analysis for time-varying chaos unitary matrix based differential MIMO system2022
- Author(s)
  Xiaodan Zhai, Guochao Song, Lixia Xiao, Guanghua Liu, Naoki Ishikawa, Tao Jiang
- Journal Title
  
  IEEE Wireless Communications Letters
  
  Volume: -
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14987
[Journal Article] Artificially Time-Varying Differential MIMO for Achieving Practical Physical Layer Security2021
- Author(s)
  Naoki Ishikawa, Jehad M. Hamamreh, Eiji Okamoto, Chao Xu, Lixia Xiao
- Journal Title
  
  IEEE Open Journal of the Communications Society
  
  Volume: 2 Pages: 2180-2194
- DOI
  10.1109/ojcoms.2021.3112486
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14987
[Journal Article] Space-, Time-and Frequency-Domain Index Modulation for Next-Generation Wireless: A Unified Single-/Multi-Carrier and Single-/Multi-RF MIMO Framework2021
- Author(s)
  Chao Xu, Yifeng Xiong, Naoki Ishikawa, Rakshith Rajashekar, Shinya Sugiura, Zhaocheng Wang, Soon Ng, Lie-Liang Yang, and Lajos Hanzo
- Journal Title
  
  IEEE Transactions on Wireless Communications
  
  Volume: - Issue: 6 Pages: 3847-3864
- DOI
  10.1109/twc.2021.3054068
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14987, KAKENHI-PROJECT-16KK0120
[Journal Article] Quantum Speedup for Index Modulation2021
- Author(s)
  Naoki Ishikawa
- Journal Title
  
  IEEE Access
  
  Volume: 9 Pages: 111114-111124
- DOI
  10.1109/access.2021.3103207
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-19K14987
[Journal Article] Differentially-Encoded Rectangular Spatial Modulation Approaches the Performance of Its Coherent Counterpart2020
- Author(s)
  Lixia Xiao, Pei Xiao, Hang Ruan, Naoki Ishikawa, Lei Lu, Yue Xiao, and Lajos Hanzo
- Journal Title
  
  IEEE Transactions on Communications
  
  Volume: 68 Issue: 12 Pages: 7593-7607
- DOI
  10.1109/tcomm.2020.3021117
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14987
[Journal Article] Subcarrier Subset Selection-Aided Transmit Precoding Achieves Full-Diversity in Index Modulation2019
- Author(s)
  Rajashekar Rakshith、Xu Chao、Ishikawa Naoki、Yang Lie-Liang、Hanzo Lajos
- Journal Title
  
  IEEE Transactions on Vehicular Technology
  
  Volume: 68 Issue: 11 Pages: 11031-11041
- DOI
  10.1109/tvt.2019.2942634
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14987
[Journal Article] “Near-Perfect” Finite-Cardinality Generalized Space-Time Shift Keying2019
- Author(s)
  Xu Chao、Zhang Peichang、Rajashekar Rakshith、Ishikawa Naoki、Sugiura Shinya、Wang Zhaocheng、Hanzo Lajos
- Journal Title
  
  IEEE Journal on Selected Areas in Communications
  
  Volume: 37 Issue: 9 Pages: 2146-2164
- DOI
  10.1109/jsac.2019.2929450
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14987
[Journal Article] IMToolkit: An Open-Source Index Modulation Toolkit for Reproducible Research Based on Massively Parallel Algorithms2019
- Author(s)
  Ishikawa Naoki
- Journal Title
  
  IEEE Access
  
  Volume: 7 Pages: 93830-93846
- DOI
  10.1109/access.2019.2928033
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-19K14987
[Journal Article] Differential-Detection Aided Large-Scale Generalized Spatial Modulation is Capable of Operating in High-Mobility Millimeter-Wave Channels2019
- Author(s)
  Ishikawa Naoki、Rajashekar Rakshith、Xu Chao、El-Hajjar Mohammed、Sugiura Shinya、Yang Lie-Liang、Hanzo Lajos
- Journal Title
  
  IEEE Journal of Selected Topics in Signal Processing
  
  Volume: 13 Issue: 6 Pages: 1360-1374
- DOI
  10.1109/jstsp.2019.2913130
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14987
[Journal Article] Sixty Years of Coherent Versus Non-Coherent Tradeoffs and the Road From 5G to Wireless Futures2019
- Author(s)
  Xu Chao、Ishikawa Naoki、Rajashekar Rakshith、Sugiura Shinya、Maunder Robert G.、Wang Zhaocheng、Yang Lie-Liang、Hanzo Lajos
- Journal Title
  
  IEEE Access
  
  Volume: 7 Pages: 178246-178299
- DOI
  10.1109/access.2019.2957706
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14987
[Journal Article] Multicarrier Division Duplex Aided Millimeter Wave Communications2019
- Author(s)
  Rajashekar Rakshith、Xu Chao、Ishikawa Naoki、Yang Lie-Liang、Hanzo Lajos
- Journal Title
  
  IEEE Access
  
  Volume: 7 Pages: 100719-100732
- DOI
  10.1109/access.2019.2930333
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14987
[Journal Article] Finite-cardinality single-RF differential space-time modulation for improving the diversity-throughput tradeoff2019
- Author(s)
  Chao Xu, Peichang Zhang, Rakshith Rajashekar, Naoki Ishikawa, Shinya Sugiura, Li Wang, and Lajos Hanzo
- Journal Title
  
  IEEE Transactions on Communications
  
  Volume: 67 Issue: 1 Pages: 318-335
- DOI
  10.1109/tcomm.2018.2869812
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17H07036
[Journal Article] Differential space-time coding dispensing with channel-estimation approaches the performance of its coherent counterpart in the open-loop massive MIMO-OFDM downlink2018
- Author(s)
  Naoki Ishikawa, Rakshith Rajashekar, Chao Xu, Shinya Sugiura, and Lajos Hanzo
- Journal Title
  
  IEEE Transactions on Communications
  
  Volume: 66 Issue: 12 Pages: 6190-6204
- DOI
  10.1109/tcomm.2018.2867528
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17H07036
[Journal Article] 50 years of permutation, spatial and index modulation: From classic RF to visible light communications and data storage2018
- Author(s)
  N. Ishikawa, S. Sugiura, and L. Hanzo
- Journal Title
  
  IEEE Communications Surveys and Tutorials
  
  Volume: 印刷中 Issue: 3 Pages: 1-34
- DOI
  10.1109/comst.2018.2815642
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26709028, KAKENHI-PROJECT-17H07036
[Journal Article] Single-RF index shift keying aided differential space-time block coding2018
- Author(s)
  C. Xu, R. Rajashekar, N. Ishikawa, S. Sugiura, and L. Hanzo
- Journal Title
  
  IEEE Transactions on Signal Processing
  
  Volume: 66 Issue: 3 Pages: 773-788
- DOI
  10.1109/tsp.2017.2768019
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26709028, KAKENHI-PROJECT-17H07036
[Journal Article] Algebraic Differential Spatial Modulation is Capable of Approaching the Performance of its Coherent Counterpart2017
- Author(s)
  Rakshith Rajashekar, Chao Xu, Naoki Ishikawa, Shinya Sugiura, K.V.S. Hari, Lajos Hanzo
- Journal Title
  
  IEEE Transactions on Communications
  
  Volume: 65 Pages: 4260-4273
- DOI
  10.1109/tcomm.2017.2720170
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-17H07036
[Presentation] ［特別招待講演］量子計算の通信応用における現状と課題2024
- Author(s)
  石川直樹
- Organizer
  電子情報通信学会コミュニケーションシステム研究会
- Invited
- Data Source
  KAKENHI-PROJECT-23K22755
[Presentation] グローバー適応探索の量子ビット・ゲート数削減手法2023
- Author(s)
  佐野友貴, 山本直樹, 石川直樹
- Organizer
  第8回量子ソフトウェア研究会
- Data Source
  KAKENHI-PROJECT-23K22755
[Presentation] ［招待講演］量子全探索アルゴリズムの基礎とその通信・信号処理応用2023
- Author(s)
  石川直樹
- Organizer
  電子情報通信学会信号処理研究会
- Invited
- Data Source
  KAKENHI-PROJECT-23K22755
[Presentation] Grover adaptive search for joint maximum-likelihood detection of power-domain non-orthogonal multiple access2023
- Author(s)
  Masaya Norimoto, Naoki Ishikawa
- Organizer
  IEEE Vehicular Technology Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K22755
[Presentation] 半正定値計画緩和とグローバー適応探索による最尤検出の量子加速検証2023
- Author(s)
  法本雅矢, 石川直樹
- Organizer
  第38回信号処理シンポジウム
- Data Source
  KAKENHI-PROJECT-23K22755
[Presentation] 電力領域NOMAの最尤検出における量子加速の数値検証2023
- Author(s)
  法本雅矢, 石川直樹
- Organizer
  移動通信ワークショップ
- Data Source
  KAKENHI-PROJECT-23K22755
[Presentation] [Tutorial] Fundamentals of Quantum Speedup for Wireless Communications2022
- Author(s)
  Naoki Ishikawa
- Organizer
  IEICE SmartCom Virtual Workshop #02
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-23K22755
[Presentation] 2元定重み符号の量子探索アルゴリズム2022
- Author(s)
  雪吉稀允, 石川直樹
- Organizer
  第7回量子ソフトウェア研究会
- Data Source
  KAKENHI-PROJECT-23K22755
[Presentation] ［依頼講演］無線通信と量子計算の数学的類似性および最新の応用研究動向2022
- Author(s)
  石川直樹, 法本雅矢, 佐野友貴
- Organizer
  電子情報通信学会スマート無線研究会
- Invited
- Data Source
  KAKENHI-PROJECT-23K22755
[Presentation] ［招待講演］無線通信の量子加速2022
- Author(s)
  石川直樹
- Organizer
  電子情報通信学会ソサイエティ大会
- Invited
- Data Source
  KAKENHI-PROJECT-23K22755
[Presentation] Optimal but Low-Complexity Optimization Method for Nonsquare Differential Massive MIMO2021
- Author(s)
  Yuma Katsuki, Naoki Ishikawa
- Organizer
  IEEE 94th Vehicular Technology Conference
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-19K14987
[Presentation] 今日から使えるインデックス変調2021
- Author(s)
  石川直樹
- Organizer
  第26回フォトニックネットワークチュートリアル講演会
- Invited
- Data Source
  KAKENHI-PROJECT-19K14987
[Presentation] 空間変調の流行と50年間の研究変遷2018
- Author(s)
  石川直樹
- Organizer
  電子情報通信学会スマート無線研究会
- Invited
- Data Source
  KAKENHI-PROJECT-17H07036
[Presentation] 非正方差動符号化方式の適応的検出アルゴリズムと大規模ミリ波MIMO-OFDM通信への適用2018
- Author(s)
  石川直樹
- Organizer
  電子情報通信学会信号処理シンポジウム
- Data Source
  KAKENHI-PROJECT-17H07036
[Presentation] 大規模アンテナアレイOFDMシステムに適した低密度差動ブロック符号の提案2017
- Author(s)
  石川直樹, 杉浦慎哉
- Organizer
  電子情報通信学会信号処理シンポジウム
- Data Source
  KAKENHI-PROJECT-17H07036
[Presentation] 空間変調のミリ波・可視光・マルチキャリア通信応用2017
- Author(s)
  石川直樹
- Organizer
  電子情報通信学会ワイドバンドシステム研究会
- Invited
- Data Source
  KAKENHI-PROJECT-17H07036

1. 落合秀樹 (20334576)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
2. 石橋功至 (80452176)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
3. 山梨裕希 (70467059)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
4. HANZO Lajos

# of Collaborated Projects: 0 results

# of Collaborated Products: 2 results
5. 森立平

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
6. 杉浦慎哉

# of Collaborated Projects: 0 results

# of Collaborated Products: 2 results

ISHIKAWA Naoki 石川 直樹

Ishikawa Naoki 石川 直樹

Research Projects

Research Products

Co-Researchers

無線誤り訂正を加速する量子最適化技術の開発Principal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

無線通信の高速大容量化を加速する量子最適化Principal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Study on superconductor circuits with ultra-high power efficiency by introducing stochastic operation

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

Differential-encoding aided physical-layer securityPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Review Section

Research Institution

A study on nonsquare differential space-time coding for massive MIMO-OFDM communicationsPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

[Journal Article] Accelerating Grover adaptive search: Qubit and gate count reduction strategies with higher-order formulations2024

Author(s)

Journal Title

Data Source

[Journal Article] Qubit reduction and quantum speedup for wireless channel assignment problem2023

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Quantum Algorithm for Higher-Order Unconstrained Binary Optimization and MIMO Maximum Likelihood Detection2022

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Error probability analysis for time-varying chaos unitary matrix based differential MIMO system2022

Author(s)

Journal Title

Data Source

[Journal Article] Artificially Time-Varying Differential MIMO for Achieving Practical Physical Layer Security2021

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Space-, Time-and Frequency-Domain Index Modulation for Next-Generation Wireless: A Unified Single-/Multi-Carrier and Single-/Multi-RF MIMO Framework2021

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Quantum Speedup for Index Modulation2021

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Differentially-Encoded Rectangular Spatial Modulation Approaches the Performance of Its Coherent Counterpart2020

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Subcarrier Subset Selection-Aided Transmit Precoding Achieves Full-Diversity in Index Modulation2019

Author(s)

Journal Title

DOI

Data Source

[Journal Article] “Near-Perfect” Finite-Cardinality Generalized Space-Time Shift Keying2019

Author(s)

ISHIKAWA Naoki 石川直樹

Ishikawa Naoki 石川直樹