Naoki Ishikawa

61 papers B 1C 1Journal 42Unranked 17

Year	Rank	Type	Title / Venue / Authors
2026	J	`jnl`	Quantum-Accelerated Wireless Communications: Concepts, Connections, and Implications. IEEE Commun. Mag. Naoki Ishikawa, Giuseppe Thadeu Freitas de Abreu, Petar Popovski, Robert W. Heath Jr.
2026	J	`jnl`	Scalable and Near-Optimal Discrete Phase Shift Optimization for Reconfigurable Intelligent Surfaces with Over 20,000 Elements. CoRR Yuto Hama, Daisuke Kitayama, Kensuke Inaba, Toshimori Honjo, Hiroki Takesue, Naoki Ishikawa, Hiroyuki Takahashi
2026	J	`jnl`	Sparse Grassmannian Design for Noncoherent Codes via Schubert Cell Decomposition. CoRR Joe Asano, Yuto Hama, Hiroki Iimori, Chandan Pradhan, Szabolcs Malomsoky, Naoki Ishikawa
2026	J	`jnl`	Sparse Grassmannian Design for Noncoherent Codes via Schubert Cell Decomposition. IEEE Open J. Commun. Soc. Joe Asano, Yuto Hama, Hiroki Iimori, Chandan Pradhan, Szabolcs Malomsoky, Naoki Ishikawa
2026	J	`jnl`	Superimposed Pilot-Based OTFS: Will It Work? IEEE Trans. Veh. Technol. Yuta Kanazawa, Hiroki Iimori, Chandan Pradhan, Szabolcs Malomsoky, Naoki Ishikawa
2025	J	`jnl`	Covert Communications Without Pre-Sharing of Side Information and Channel Estimation Over Quasi-Static Fading Channels. IEEE Wirel. Commun. Lett. Hiroki Fukada, Hiroki Iimori, Chandan Pradhan, Szabolcs Malomsoky, Naoki Ishikawa
2025	J	`jnl`	Maximizing Spectrum Efficiency of Data-Carrying Reference Signals via Bayesian Optimization. IEEE Open J. Commun. Soc. Taiki Kato, Hiroki Iimori, Chandan Pradhan, Szabolcs Malomsoky, Naoki Ishikawa
2025	—	`conf`	Quantum Speedup for Pilot Assignment Problems. VTC2025-Spring Taku Mikuriya, Kengo Ando, Kein Yukiyoshi, Giuseppe Thadeu Freitas de Abreu, Koji Ishibashi, Naoki Ishikawa
2025	—	`conf`	Quantum-Assisted Maximum Likelihood Detection of Generalized Spatial Modulation. VTC2025-Fall Taku Mikuriya, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, Koji Ishibashi, Naoki Ishikawa
2025	—	`conf`	Quantum-Native Formulation of Maximum Likelihood Detection in Random Access Channel with Overloaded MIMO. VTC2025-Fall Hyoga Iizumi, Naoki Ishikawa, Shunsuke Uehashi, Kota Nakamura, Akira Kurita, Masao Oga
2024	—	`conf`	AFDM Chirp-Permutation-Index Modulation with Quantum-Accelerated Codebook Design. IEEECONF Hyeon Seok Rou, Kein Yukiyoshi, Taku Mikuriya, Giuseppe Thadeu Freitas de Abreu, Naoki Ishikawa
2024	J	`jnl`	Boosting Spectral Efficiency With Data-Carrying Reference Signals on the Grassmann Manifold. IEEE Trans. Wirel. Commun. Naoki Endo, Hiroki Iimori, Chandan Pradhan, Szabolcs Malomsoky, Naoki Ishikawa
2024	J	`jnl`	Boosting Spectral Efficiency with Data-Carrying Reference Signals on the Grassmann Manifold. CoRR Naoki Endo, Hiroki Iimori, Chandan Pradhan, Szabolcs Malomsoky, Naoki Ishikawa
2024	—	`conf`	Deep Neural Network Based Reduced-Complexity Detector for Grassmann Constellation. VTC Fall Ryusei Baba, Hiroki Iimori, Chandan Pradhan, Szabolcs Malomsoky, Naoki Ishikawa
2024	—	`conf`	Grover Adaptive Search for Maximum Likelihood Detection of Generalized Spatial Modulation. VTC Fall Kein Yukiyoshi, Taku Mikuriya, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, Naoki Ishikawa
2024	—	`conf`	Performance Analysis of Data-Carrying Reference Signal in Time-Varying Channels. VTC Spring Taiki Kato, Hiroki Iimori, Chandan Pradhan, Szabolcs Malomsoky, Naoki Ishikawa
2024	J	`jnl`	Quantum Speedup for Multiuser Detection With Optimized Parameters in Grover Adaptive Search. IEEE Access Masaya Norimoto, Taku Mikuriya, Naoki Ishikawa
2024	J	`jnl`	Quantum Speedup for Polar Maximum Likelihood Decoding. CoRR Shintaro Fujiwara, Naoki Ishikawa
2024	J	`jnl`	Quantum search algorithm for binary constant weight codes. Quantum Inf. Process. Kein Yukiyoshi, Naoki Ishikawa
2023	J	`jnl`	A New Noncoherent Gaussian Signaling Scheme for Low Probability of Detection Communications. CoRR Yuma Katsuki, Giuseppe Thadeu Freitas de Abreu, Koji Ishibashi, Naoki Ishikawa
2023	J	`jnl`	A New Noncoherent Gaussian Signaling Scheme for Low Probability of Detection Communications. IEEE Wirel. Commun. Lett. Yuma Katsuki, Giuseppe Thadeu Freitas de Abreu, Koji Ishibashi, Naoki Ishikawa
2023	—	`conf`	Grover Adaptive Search for Joint Maximum-Likelihood Detection of Power-Domain Non-Orthogonal Multiple Access. VTC2023-Spring Masaya Norimoto, Naoki Ishikawa
2023	—	`conf`	Multiple Superimposed Pilots for Accurate Channel Estimation in Orthogonal Time Frequency Space Modulation. VTC Fall Yuta Kanazawa, Hiroki Iimori, Chandan Pradhan, Szabolcs Malomsoky, Naoki Ishikawa
2023	J	`jnl`	Noncoherent Massive MIMO With Embedded One-Way Function Physical Layer Security. IEEE Trans. Inf. Forensics Secur. Yuma Katsuki, Giuseppe Thadeu Freitas de Abreu, Koji Ishibashi, Naoki Ishikawa
2023	J	`jnl`	On the Capacity of Generalized Quadrature Spatial Modulation. CoRR Kein Yukiyoshi, Naoki Ishikawa
2023	J	`jnl`	On the Capacity of Generalized Quadrature Spatial Modulation. IEEE Wirel. Commun. Lett. Kein Yukiyoshi, Naoki Ishikawa
2023	J	`jnl`	Quantum Algorithm for Higher-Order Unconstrained Binary Optimization and MIMO Maximum Likelihood Detection. IEEE Trans. Commun. Masaya Norimoto, Ryuhei Mori, Naoki Ishikawa
2022	—	`conf`	Analysis of Secret Key Agreement Protocol for Massive MIMO Systems. CISIS-ICEUTE Seiya Otsuka, Hiroki Iimori, Kengo Ando, Giuseppe Thadeu Freitas de Abreu, Koji Ishibashi, Naoki Ishikawa
2022	J	`jnl`	Error Probability Analysis for Time-Varying Chaos Unitary Matrix-Based Differential MIMO System. IEEE Wirel. Commun. Lett. Xiaodan Zhai, Guochao Song, Lixia Xiao, Guanghua Liu, Naoki Ishikawa, Tao Jiang
2022	J	`jnl`	Quantum Search Algorithm for Binary Constant Weight Codes. CoRR Kein Yukiyoshi, Naoki Ishikawa
2022	J	`jnl`	Qubit Reduction and Quantum Speedup for Wireless Channel Assignment Problem. CoRR Yuki Sano, Masaya Norimoto, Naoki Ishikawa
2021	J	`jnl`	Artificially Time-Varying Differential MIMO for Achieving Practical Physical Layer Security. IEEE Open J. Commun. Soc. Naoki Ishikawa, Jehad M. Hamamreh, Eiji Okamoto, Chao Xu, Lixia Xiao
2021	—	`conf`	Optimal but Low-Complexity Optimization Method for Nonsquare Differential Massive MIMO. VTC Fall Yuma Katsuki, Naoki Ishikawa
2021	J	`jnl`	Quantum Speedup for Index Modulation. IEEE Access Naoki Ishikawa
2021	J	`jnl`	Space-, Time- and Frequency-Domain Index Modulation for Next-Generation Wireless: A Unified Single-/Multi-Carrier and Single-/Multi-RF MIMO Framework. IEEE Trans. Wirel. Commun. Chao Xu, Yifeng Xiong, Naoki Ishikawa, Rakshith Rajashekar, Shinya Sugiura, Zhaocheng Wang, Soon Xin Ng, Lie-Liang Yang, Lajos Hanzo
2020	J	`jnl`	Differentially-Encoded Rectangular Spatial Modulation Approaches the Performance of Its Coherent Counterpart. IEEE Trans. Commun. Lixia Xiao, Pei Xiao, Hang Ruan, Naoki Ishikawa, Lei Lu, Yue Xiao, Lajos Hanzo
2019	J	`jnl`	"Near-Perfect" Finite-Cardinality Generalized Space-Time Shift Keying. IEEE J. Sel. Areas Commun. Chao Xu, Peichang Zhang, Rakshith Rajashekar, Naoki Ishikawa, Shinya Sugiura, Zhaocheng Wang, Lajos Hanzo
2019	—	`conf`	Designing of a Network Infrastructure to Promote Active Participation of Youth in Local Community Revitalization. IIAI-AAI Naoki Ishikawa, Atsushi Shimoda, Hironori Takuma
2019	J	`jnl`	Differential-Detection Aided Large-Scale Generalized Spatial Modulation is Capable of Operating in High-Mobility Millimeter-Wave Channels. IEEE J. Sel. Top. Signal Process. Naoki Ishikawa, Rakshith Rajashekar, Chao Xu, Mohammed El-Hajjar, Shinya Sugiura, Lie-Liang Yang, Lajos Hanzo
2019	J	`jnl`	Finite-Cardinality Single-RF Differential Space-Time Modulation for Improving the Diversity-Throughput Tradeoff. IEEE Trans. Commun. Chao Xu, Peichang Zhang, Rakshith Rajashekar, Naoki Ishikawa, Shinya Sugiura, Li Wang, Lajos Hanzo
2019	J	`jnl`	IMToolkit: An Open-Source Index Modulation Toolkit for Reproducible Research Based on Massively Parallel Algorithms. IEEE Access Naoki Ishikawa
2019	J	`jnl`	Multicarrier Division Duplex Aided Millimeter Wave Communications. IEEE Access Rakshith Rajashekar, Chao Xu, Naoki Ishikawa, Lie-Liang Yang, Lajos Hanzo
2019	J	`jnl`	Nulls in the Air: Passive and Low-Complexity QoS Estimation Method for a Large-Scale Wi-Fi Network Based on Null Function Data Frames. IEEE Access Naoki Ishikawa, Yasuhiro Ohishi, Kaori Maeda
2019	J	`jnl`	Sixty Years of Coherent Versus Non-Coherent Tradeoffs and the Road From 5G to Wireless Futures. IEEE Access Chao Xu, Naoki Ishikawa, Rakshith Rajashekar, Shinya Sugiura, Robert G. Maunder, Zhaocheng Wang, Lie-Liang Yang, Lajos Hanzo
2019	J	`jnl`	Subcarrier Subset Selection-Aided Transmit Precoding Achieves Full-Diversity in Index Modulation. IEEE Trans. Veh. Technol. Rakshith Rajashekar, Chao Xu, Naoki Ishikawa, Lie-Liang Yang, Lajos Hanzo
2018	J	`jnl`	50 Years of Permutation, Spatial and Index Modulation: From Classic RF to Visible Light Communications and Data Storage. IEEE Commun. Surv. Tutorials Naoki Ishikawa, Shinya Sugiura, Lajos Hanzo
2018	J	`jnl`	Differential Space-Time Coding Dispensing With Channel Estimation Approaches the Performance of Its Coherent Counterpart in the Open-Loop Massive MIMO-OFDM Downlink. IEEE Trans. Commun. Naoki Ishikawa, Rakshith Rajashekar, Chao Xu, Shinya Sugiura, Lajos Hanzo
2018	J	`jnl`	Single-RF Index Shift Keying Aided Differential Space-Time Block Coding. IEEE Trans. Signal Process. Chao Xu, Rakshith Rajashekar, Naoki Ishikawa, Shinya Sugiura, Lajos Hanzo
2017	J	`jnl`	Algebraic Differential Spatial Modulation Is Capable of Approaching the Performance of Its Coherent Counterpart. IEEE Trans. Commun. Rakshith Rajashekar, Chao Xu, Naoki Ishikawa, Shinya Sugiura, K. V. S. Hari, Lajos Hanzo
2017	J	`jnl`	Full-Diversity Dispersion Matrices From Algebraic Field Extensions for Differential Spatial Modulation. IEEE Trans. Veh. Technol. Rakshith Rajashekar, Naoki Ishikawa, Shinya Sugiura, K. V. S. Hari, Lajos Hanzo
2017	J	`jnl`	Generalized-Spatial-Modulation-Based Reduced-RF-Chain Millimeter-Wave Communications. IEEE Trans. Veh. Technol. Naoki Ishikawa, Rakshith Rajashekar, Shinya Sugiura, Lajos Hanzo
2017	J	`jnl`	Rectangular Differential Spatial Modulation for Open-Loop Noncoherent Massive-MIMO Downlink. IEEE Trans. Wirel. Commun. Naoki Ishikawa, Shinya Sugiura
2016	J	`jnl`	Subcarrier-Index Modulation Aided OFDM - Will It Work? IEEE Access Naoki Ishikawa, Shinya Sugiura, Lajos Hanzo
2015	—	`conf`	Exit-Chart-Based Design of Irregular Precoded Power-Imbalanced Optical Spatial Modulation. VTC Fall Naoki Ishikawa, Shinya Sugiura
2014	—	`conf`	Single- and Multiple-RF Aided Non-Coherent Generalized Spatial Modulation. VTC Spring Naoki Ishikawa, Shinya Sugiura
2014	J	`jnl`	Unified Differential Spatial Modulation. IEEE Wirel. Commun. Lett. Naoki Ishikawa, Shinya Sugiura
2010	—	`conf`	Detection of Submitters Suspected of Pretending to be Someone Else to Manipulate Communications in a Community Site. CSEDU (1) Naoki Ishikawa, Ryo Nishimura, Yasuhiko Watanabe, Yoshihiro Okada, Masaki Murata
2010	C	`conf`	Detection of Users Suspected of Pretending to Be Other Users in a Community Site by Using Messages Submitted to Non-Target Categories. PACLIC Naoki Ishikawa, Ryo Nishimura, Yasuhiko Watanabe, Masaki Murata, Yoshihiro Okada
2010	B	`conf`	Detection of submitters suspected of pretending to be someone else in a community site. LREC Naoki Ishikawa, Ryo Nishimura, Yasuhiko Watanabe, Yoshihiro Okada, Masaki Murata
2010	—	`conf`	Detection of users suspected of using multiple user accounts and manipulating evaluations in a community site. NLPKE Naoki Ishikawa, Kenji Umemoto, Yasuhiko Watanabe, Yoshihiro Okada, Ryo Nishimura, Masaki Murata
2009	—	`conf`	Determination of submitters suspected of pretending to be someone else to manipulate message evaluations in a communication site. IADIS AC (2) Naoki Ishikawa, Ryo Nishimura, Yasuhiko Watanabe, Masaki Murata, Yoshihiro Okada