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FY2024 FY2023 FY2022 FY2021 FY2020

FY2024

• Please check the top page for the latest information.
• 2025/03/28 Mr. Endo, a graduate of the Master's course, received the Telecom System Technology Student Award from the Telecommunications Advancement Foundation. (TAF)
• 2025/03/25 Two graduate students successfully completed their master's degrees, and seven undergraduate students successfully completed their bachelor's degrees. In addition, Mr. Yukiyoshi received five awards, including the President's Award.
• 2025/02/27 Prof. Ishikawa gave a talk at the Ministry of Defense, Japan.
• 石川 直樹, “無線通信分野に対する量子計算の適用事例,” 防衛省, 2025年02月27日.
• 2025/02/27 Joint research agreement of seven organizations for scalable quantum information processing has been signed. (YNU)
• 2025/02/21 A new preprint on data-carrying reference signals is available for download.
• Taiki Kato, Hiroki Iimori, Chandan Pradhan, Szabolcs Malomsoky, Naoki Ishikawa, “Maximizing spectrum efficiency of data-carrying reference signals via Bayesian optimization,” arXiv:2502.14453 [eess.SP].
• 2025/02/05 Our paper on the Grassmann-based covert communications has been accepted for publication in IEEE Wireless Communications Letters.
• Hiroki Fukada, Hiroki Iimori, Chandan Pradhan, Szabolcs Malomsoky, Naoki Ishikawa, “Covert communications without pre-sharing of side information and channel estimation over quasi-static fading channels,” IEEE Wireless Communications Letters, in press. (arXiv)
• 2025/01/27 A new preprint on OTFS is available for download.
• Yuta Kanazawa, Hiroki Iimori, Chandan Pradhan, Szabolcs Malomsoky, Naoki Ishikawa, “Superimposed Pilot-Based OTFS – Will it Work?,” arXiv:2501.15935 [eess.SP].
• 2024/11/27 Prof. Ishikawa gave a talk at Mitsubishi Electric Information Technology R&D Center.
• 石川 直樹, “量子関連技術の基礎とICT分野への応用,” 三菱電機情報技術総合研究所, 2024年11月27日.
• 2024/10/16 A new preprint on quantum polar ML decoding is available for download.
• Shintaro Fujiwara and Naoki Ishikawa, “Quantum speedup for polar maximum likelihood decoding,” arXiv:2411.04727 [quant-ph].
• 2024/11/03 The 3rd Quantum Programming Contest Qcoder, developed by Mr. Yukiyoshi and his collaborators, was held. (Qcoder)
• 2024/10/27 Mr. Rou, a PhD candidate at Prof. Abreu's group, will give a presentation at Asilomar Conference on Signals, Systems, and Computers.
• Hyeon Seok Rou, Kein Yukiyoshi, Taku Mikuriya, Giuseppe Thadeu Freitas de Abreu, and Naoki Ishikawa, “AFDM chirp-permutation-index modulation with quantum-accelerated codebook design,” Asilomar Conference on Signals, Systems, and Computers, California, US, October 2024.
• 2024/10/17 A new preprint on quadratic assignment problem is available for download.
• Taku Mikuriya, Kein Yukiyoshi, Shintaro Fujiwara, Giuseppe Thadeu Freitas de Abreu, and Naoki Ishikawa, “Quantum speedup for the quadratic assignment problem,” arXiv:2410.12181 [quant-ph].
• 2024/10/16 A new preprint on Grover adaptive search with spin variables is available for download.
• Shintaro Fujiwara and Naoki Ishikawa, “Grover adaptive search with spin variables,” arXiv:2410.11633 [quant-ph].
• 2024/10/10 Our paper on the quantum algorithm for binary constant weight codes has been accepted for publication in Quantum Information Processing.
• Kein Yukiyoshi and Naoki Ishikawa, “Quantum search algorithm for binary constant weight codes,” Quantum Information Processing, in press. (arXiv)
• 2024/10/10 Mr. Yukiyoshi, a second-year master's course student, gave a presentation on GAS at IEEE VTC2024-Fall, and received the IEEE VTS Tokyo/Japan Chapter 2024 Young Researcher's Encouragement Award. (Program p. 45 / IEEE VTS Tokyo/Japan Chapter / YNU)
• Kein Yukiyoshi, Taku Mikuriya, Hyeon Seok Rou, Giuseppe Abreu, Naoki Ishikawa, “Grover adaptive search for maximum likelihood detection of generalized spatial modulation,” IEEE Vehicular Technology Conference (VTC2024-Fall), Washington DC, US, October 2024.
• 2024/10/08 Mr. Baba, a first-year master's course student, gave a presentation on DNN-based detector for Grassmann constellation at IEEE VTC2024-Fall, and received the IEEE VTS Tokyo/Japan Chapter 2024 Young Researcher's Encouragement Award. (Program p. 37 / IEEE VTS Tokyo/Japan Chapter / YNU)
• Ryusei Baba, Hiroki Iimori, Chandan Pradhan, Szabolcs Malomsoky, and Naoki Ishikawa, “Deep neural network based reduced-complexity detector for Grassmann constellation,” IEEE Vehicular Technology Conference (VTC2024-Fall), Washington DC, US, October 2024.
• 2024/10/01 Five undergraduate students joined our laboratory.
• 2024/09/19 A new preprint on Grassmann-based covert communication is available for download.
• Hiroki Fukada, Hiroki Iimori, Chandan Pradhan, Szabolcs Malomsoky, Naoki Ishikawa, “Covert communications without pre-sharing of side information and channel estimation over quasi-static fading channels,” arXiv:2409.11755 [eess.SP].
• 2024/09/18 JST approved funding our joint research project for CRONOS.
• 2023/08/28 Our paper on Grover adaptive search has been accepted for publication in IEEE Transactions on Quantum Engineering.
• Kein Yukiyoshi, Taku Mikuriya, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, and Naoki Ishikawa, “Quantum speedup of the dispersion and codebook design problems,” IEEE Transactions on Quantum Engineering, in press. (arXiv)
  
• 2024/06/25 Mr. Kato, a first-year master's course student, gave a presentation on data-carrying reference signals at IEEE VTC2024-Spring, and received the IEEE VTS Tokyo/Japan Chapter 2024 Young Researcher's Encouragement Award. (Program p. 23 / IEEE VTS Tokyo/Japan Chapter / YNU)
• Taiki Kato, Hiroki Iimori, Chandan Pradhan, Szabolcs Malomsoky, and Naoki Ishikawa, “Performance analysis of data-carrying reference signal in time-varying channels,” IEEE Vehicular Technology Conference (VTC2024-Spring), Singapore, June 2024.
• 2024/06/12 A new preprint on Grover adaptive search is available for download.
• Kein Yukiyoshi, Taku Mikuriya, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, and Naoki Ishikawa, “Quantum speedup of the dispersion and codebook design problems,” arXiv:2406.07187 [quant-ph].
• 2024/06/07 Our paper on the quantum speedup for multiuser detection has been accepted for publication in IEEE Access.
• Masaya Norimoto, Taku Mikuriya, and Naoki Ishikawa, “Quantum speedup for multiuser detection with optimized parameters in Grover adaptive search,” IEEE Access, in press.
• 2024/05/29 Mr. Yukiyoshi's proposed project has been adopted by the MITOU Target Program for FY2024.（IPA）
• 2024/04/22 Our paper on the acceleration of Grover adaptive search has been accepted for publication in IEEE Transactions on Quantum Engineering.
• Yuki Sano, Kosuke Mitarai, Naoki Yamamoto, and Naoki Ishikawa, “Accelerating Grover adaptive search: Qubit and gate count reduction strategies with higher-order formulations,” IEEE Transactions on Quantum Engineering, in press. (arXiv)
• 2024/04/01 Two graduate and three undergraduate students joined our laboratory.

FY2023

• 2024/03/25 Mr. Yukiyoshi received a grant from the Unitary Fund for the global expansion of his quantum programming contest system. (Web)
• 2024/03/25 Two graduate students successfully completed their master's degrees, and three undergraduate students successfully completed their bachelor's degrees. In addition, Mr. Norimoto received the YNU CREATES Paper Award.
• 2024/03/14 Prof. Konstantin Mikhaylov (Assistant Professor, University of Oulu) visited our laboratory. He will stay until April 18.
• 2024/03/14 Mr. Norimoto received the IEICE Smart Radio Paper Award. (SR / YNU)
• 2024/02/21 Our proposal for JSPS Grant-in-Aid (Fund for the Promotion of Joint International Research) has been approved.
• 2024/02/20 Our paper on the achievable rate analysis of data-carrying reference signal has been accepted for publication in IEEE Transactions on Wireless Communications.
• Naoki Endo, Hiroki Iimori, Chandan Pradhan, Szabolcs Malomsoky, and Naoki Ishikawa, “Boosting spectral efficiency with data-carrying reference signals on the Grassmann manifold,” IEEE Transactions on Wireless Communications, in press. (arXiv)
• 2024/01/18 Mr. Katsuki received the IEEE SPS Japan Student Journal Paper Award. (SPS / YNU)
• 2023/12/08 Prof. Ishikawa received an award from the President of YNU for obtaining external fundings.
• 2023/11/22 Our joint works with Ericsson Research were introduced in Ericsson Forum 2023, Akasaka, Minato-ku, Tokyo.（ケータイWatch）
• 2023/10/10 Mr. Kanazawa, a first-year master's course student, gave a presentation on OTFS at IEEE VTC2023-Fall, and received the IEEE VTS Tokyo/Japan Chapter 2023 Young Researcher's Encouragement Award. (Program p. 33 / IEEE VTS Tokyo/Japan Chapter / YNU)
• Yuta Kanazawa, Hiroki Iimori, Chandan Pradhan, Szabolcs Malomsoky, and Naoki Ishikawa, “Multiple superimposed pilots for accurate channel estimation in orthogonal time frequency space modulation,” IEEE Vehicular Technology Conference (VTC2023-Fall), Hong Kong, China, October 2023.
• 2022/10/03 Four undergraduate students joined our laboratory.
• 2023/08/29 Our paper on the capacity analysis of GQSM has been accepted for publication in IEEE Wireless Communications Letters.
• Kein Yukiyoshi and Naoki Ishikawa, “On the capacity of generalized quadrature spatial modulation,” IEEE Wireless Communications Letters, in press.
• 2023/08/04 A new preprint on Grover adaptive search is available for download.
• Yuki Sano, Kosuke Mitarai, Naoki Yamamoto, and Naoki Ishikawa, “Accelerating Grover adaptive search: Qubit and gate count reduction strategies with higher-order formulations,” arXiv:2308.01572 [quant-ph].
• 2023/07/13 Dr. Iimori, a collaborative researcher at Ericsson Research, gave a presentation at an internal conference.（Program）
• 2023/07/12 A patent application PCT/IB2023/057172 has been filed.
• 2023/07/04 Our paper on Grover adaptive search has been accepted for publication in IEEE Transactions on Quantum Engineering.
• Yuki Sano, Masaya Norimoto, and Naoki Ishikawa, “Qubit reduction and quantum speedup for wireless channel assignment problem,” IEEE Transactions on Quantum Engineering, in press. (arXiv)
• 2023/06/23 Mr. Norimoto, a second-year master's course student, gave a presentation at IEEE VTC2023-Spring, and received the IEEE VTS Tokyo/Japan Chapter 2023 Young Researcher's Encouragement Award. (Program p. 32 / IEEE VTS Tokyo/Japan Chapter / YNU)
• Masaya Norimoto and Naoki Ishikawa, “Grover adaptive search for joint maximum-likelihood detection of power-domain non-orthogonal multiple access,” IEEE Vehicular Technology Conference (VTC2023-Spring), Florence, Italy, Jun. 2023.
• 2023/05/29 Mr. Yukiyoshi's proposed project has been adopted by the MITOU Target Program for FY2023.（IPA）
• 2023/05/11 Our paper on physical-layer security has been accepted for publication in IEEE Transactions on Information Forensics and Security.
• Yuma Katsuki, Giuseppe Thadeu Freitas de Abreu, Koji Ishibashi, and Naoki Ishikawa, “Noncoherent Massive MIMO with Embedded One-Way Function Physical Layer Security,” IEEE Transactions on Information Forensics and Security, in press. (arXiv)
• 2023/04/14 Our online lab tour was held. Thank you for your participation.
• 2023/04/11 Our paper on passive Wi-Fi monitoring has been accepted for publication in IET Electronics Letters.
• Yu Mizuno, Yasuhiro Ohishi, and Naoki Ishikawa, “A simple metric that correlates with public Wi-Fi throughput,” Electronics Letters, in press.
• 2023/04/04 A plenary meeting of JST SICORP EU-JP ORACLE project was held in Japan.

FY2022

• 2023/02/06 Our paper on quantum algorithm for wireless communications has been accepted for publication in IEEE Transactions on Communications.
• Masaya Norimoto, Ryuhei Mori, and Naoki Ishikawa, “Quantum algorithm for higher-order unconstrained binary optimization and MIMO maximum likelihood detection,” IEEE Transactions on Communications, in press. (arXiv)
• 2023/01/25 Two patent applications PCT/SE2023/050066 and PCT/SE2023/050067 have been filed.
• 2022/12/30 Our paper on low probability of detection communications has been accepted for publication in IEEE Wireless Communications Letters.
• Yuma Katsuki, Giuseppe Thadeu Freitas de Abreu, Koji Ishibashi, and Naoki Ishikawa, “A new noncoherent Gaussian signaling scheme for low probability of detection communications,” IEEE Wireless Communications Letters, in press. (arXiv)
• 2022/11/17 A patent application PCT/EP2022/082277 has been filed.
• 2022/11/10 A new preprint on quantum search algorithm for binary constant weight codes is available for download.
• Kein Yukiyoshi and Naoki Ishikawa, “Quantum search algorithm for binary constant weight codes,” arXiv:2211.04637 [quant-ph].
• 2022/10/06 Three undergraduate students joined our laboratory.
• 2022/09/07 Mr. Otsuka, a second-year master's course student, gave a presentation on the physical layer security at CISIS 2022.
• Seiya Otsuka, Hiroki Iimori, Kengo Ando, Giuseppe Thadeu Freitas de Abreu, Koji Ishibashi, Naoki Ishikawa, “Analysis of secret key agreement protocol for massive MIMO systems,” International Conference on Computational Intelligence in Security for Information Systems (CISIS), Salamanca, Spain, Sept. 2022.
• 2022/08/11 A new preprint on quantum speedup for the wireless channel assignment problem is available for download. (arXiv)
• Yuki Sano, Masaya Norimoto, and Naoki Ishikawa, “Qubit Reduction and Quantum Speedup for Wireless Channel Assignment Problem,” arXiv:2208.05181 [quant-ph].
• 2021/06/26 We organized a laboratory tour. Many thanks for the approximately 60 participants who attended.
• 2022/05/31 A new preprint on quantum speedup for MIMO maximum likelihood detection is available for download.
  • Masaya Norimoto, Ryuhei Mori, and Naoki Ishikawa, “Quantum Speedup for Higher-Order Unconstrained Binary Optimization and MIMO Maximum Likelihood Detection,” arXiv:2205.15478 [eess.SP].
• 2022/05/24 Prof. Ishikawa gave a talk entitled Fundamentals of Quantum Speedup for Wireless Communications at SmartCom Virtual Workshop #2
• Naoki Ishikawa, [Tutorial] Fundamentals of Quantum Speedup for Wireless Communications, IEICE SmartCom Virtual Workshop #02, May 2022.
• 2022/04/30 Prof. Ishikawa elevated to the grade of IEEE Senior Member.
• 2022/04/25 Our co-authored paper on the analysis of chaos-based nonsquare differential coding was accepted for publication in IEEE Wireless Communications Letters.
• Xiaodan Zhai, Guochao Song, Lixia Xiao, Guanghua Liu, Naoki Ishikawa, and Tao Jiang, “Error probability analysis for time-varying chaos unitary matrix based differential MIMO system,” IEEE Wireless Communications Letters, vol. 11, no. 7, pp. 1399–1403, July 2022.
• 2022/04/19 We organized a laboratory tour.
• 2022/04/01 Our proposal for JSPS Grant-in-Aid (Scientific Research B) has been approved.
• 2022/04/01 Our joint proposal for JSPS Grant-in-Aid (Scientific Research B) has been approved.

FY2021

• 2022/03/31 A patent application 2022-058084 has been filed.
• 2022/03/31 A patent application 2022-058078 has been filed.
• 2022/03/31 A patent application 2022-058075 has been filed.
• 2022/03/24 Three undergraduate students successfully completed their bachelor's degrees.
• 2022/03/18 The first Deliverable of the EU-JP ORACLE project has been published.（Deliverable）
• 2022/03/07 Prof. Ishikawa was certified as an IEEE Transactions on Communications Exemplary Reviewer 2021. (Web)
• 2022/02/25 A patent application 2022-028275 has been received.
• 2022/02/23 A new preprint on physical layer security is available for download.
• Yuma Katsuki, Giuseppe Thadeu Freitas de Abreu, Koji Ishibashi, and Naoki Ishikawa, “Noncoherent Massive MIMO with Embedded One-Way Function Physical Layer Security,” arXiv:2202.11893 [eess.SP].
• 2022/02/15 Our laboratory will give five presentations at IEICE General Conference. (PDF)
• 2022/02/01 Our laboratory made a joint research agreement with Ericsson.
• 2021/11/01 International press release on quantum speedup for index modulation was published. (English / Japanese)
• 2021/10/05 Three undergraduate students joined our laboratory.
• 2021/09/29 Mr. Katsuki, a first-year master's course student, gave a presentation on the nonsquare differential MIMO at IEEE VTC2021-Fall, and received the IEEE VTS Tokyo/Japan Chapter 2021 Young Researcher's Encouragement Award. (Program p. 33 / IEEE VTS Tokyo/Japan Chapter / YNU)
• Yuma Katsuki and Naoki Ishikawa, “Optimal but low-complexity optimization method for nonsquare differential massive MIMO,” IEEE Vehicular Technology Conference (VTC2021-Fall), virtual, Sept. 2021. (arXiv)
• 2021/09/08 A paper on chaos-based physical layer security scheme was accepted for publication in IEEE Open Journal of the Communications Society.
• Naoki Ishikawa, Jehad M. Hamamreh, Eiji Okamoto, Chao Xu, and Lixia Xiao, “Artificially time-varying differential MIMO for achieving practical physical layer security,” IEEE Open Journal of the Communications Society, vol. 2, pp. 2180–2194, September 2021.
• 2021/08/04 A paper on quantum speedup for wireless communications was accepted for publication in IEEE Access. This paper is a single authored publication by Dr. Ishikawa.
• Naoki Ishikawa, “Quantum speedup for index modulation,” IEEE Access, vol. 9, pp. 111114–111124, August 2021.
• 2021/07/13 The first-authored paper by Mr. Katsuki, a first-year master's course student, has been accepted to IEEE Vehicular Technology Conference 2021 Fall.
• 2021/05/09 A preprint on quantum speedup for wireless communications is now available on TechRxiv. (TechRxiv)
• 2021/04/01 Support Center for Advanced Telecommunications Technology Research (SCAT) approved funding our research project.
• 2021/04/01 Four graduate students joined our laboratory.

FY2020

• 2021/03/25 Three undergraduate students successfully completed their bachelor's degrees.
• 2021/01/20 Our paper on the fundamental analysis of DFT-s-OFDM with index modulation was accepted for publication in IEEE Transactions on Wireless Communications. This research was carried out primarily by Dr. Chao Xu, University of Southampton, UK.
• Chao Xu, Yifeng Xiong, Naoki Ishikawa, Rakshith Rajashekar, Shinya Sugiura, Zhaocheng Wang, Soon Ng, Lie-Liang Yang, and Lajos Hanzo, “Space-, time- and frequency-domain index modulation for next-generation wireless: A unified single-/multi-carrier and single-/multi-RF MIMO framework,” IEEE Transactions on Wireless Communications, vol. 20, no. 6, pp. 3847–3864, February 2021.
• 2021/01/08 JST approved funding our EU-JP joint research project. (JST Press Release No. 1480)
• 2020/10/05 Three undergraduate students joined our laboratory.
• 2020/08/31 Our paper on the nonsquare differential encoding and its error rate analysis was accepted for publication in IEEE Transactions on Communications. This research was carried out primarily by Dr. Lixia Xiao, University of Surrey, UK.
• Lixia Xiao, Pei Xiao, Hang Ruan, Naoki Ishikawa, Lei Lu, Yue Xiao, and Lajos Hanzo, “Differentially-encoded rectangular spatial modulation approaches the performance of its coherent counterpart,” IEEE Transactions on Communications, vol. 68, no. 12, pp. 7593–7607, December 2020.
  
• 2020/05/01 Our laboratory signed a joint research agreement with Internet Initiative Japan, Inc.
• 2020/04/01 Three undergraduate students joined our laboratory.
• 2020/04/01 Dr. Naoki Ishikawa started his new career as an associate professor.