Low-Complexity Generator Polynomial Search for Turbo Trellis-Coded Spatial Modulation Using Symbol-based EXIT Charts. - Takanori Hara 001; Koji Ishibashi; Soon Xin Ng; Lajos Hanzo (ISTC, 2018)

Aggregate-Compression-Aided Subcarrier IQ Index Modulation. - Kazuya Ohira; Takanori Hara 001; Koji Ishibashi (WPNC, 2018)

Low Complexity Uplink Grant-Free NOMA Based on Boosted Approximate Message Passing. - Takanori Hara 001; Koji Ishibashi (ACSSC, 2019)

On the Sum-Rate Capacity and Spectral Efficiency Gains of Massively Concurrent NOMA Systems. - Takanori Hara 001; Razvan-Andrei Stoica; Koji Ishibashi; Giuseppe Thadeu Freitas de Abreu (WCNC, 2019)

Grant-Free Non-Orthogonal Multiple Access With Multiple-Antenna Base Station and Its Efficient Receiver Design. - Takanori Hara 001; Koji Ishibashi (IEEE Access, 2019)

Massively Concurrent Non-Orthogonal Multiple Access for 5G Networks and Beyond. - Razvan-Andrei Stoica; Giuseppe Thadeu Freitas de Abreu; Takanori Hara 001; Koji Ishibashi (IEEE Access, 2019)

Packet Aggregation Based on Encryption-Then-Compression for Highly Efficient Multi-Hop Transmission. - Ryota Yatsu; Takanori Hara 001; Koji Ishibashi; Sota Tsuchiya; Hideki Endo (APSIPA, 2020)

Activity Detection for Uplink Grant-Free NOMA in the Presence of Carrier Frequency Offsets. - Takanori Hara 001; Hiroki Iimori; Koji Ishibashi (ICC Workshops, 2020)

Grant-Free NOMA Using Approximate Message Passing with Multi-Measurement Vector. - Takanori Hara 001; Koji Ishibashi (ICOIN, 2020)

Research Project to Realize Various High-reliability Communications in Advanced 5G Network. - Takahide Murakami; Yoji Kishi; Koji Ishibashi; Keisuke Kasai; Hiroyuki Shinbo; Morihiko Tamai; Kensuke Tsuda; Masataka Nakazawa; Yu Tsukamoto; Hiroyuki Yokoyama; Yoshimi Fujii; Yuta Seki; et al. (WCNC, 2020)

Stochastic Learning Robust Beamforming for Millimeter-Wave Systems With Path Blockage. - Hiroki Iimori; Giuseppe Thadeu Freitas de Abreu; Omid Taghizadeh; Razvan-Andrei Stoica; Takanori Hara 001; Koji Ishibashi (IEEE Wirel. Commun. Lett., 2020)

Ambient OFDM Pilot-Aided Backscatter Communications: Concept and Design. - Takanori Hara 001; Ryuhei Takahashi; Koji Ishibashi (IEEE Access, 2021)

A Stochastic Gradient Descent Approach for Hybrid mmWave Beamforming With Blockage and CSI-Error Robustness. - Hiroki Iimori; Giuseppe Thadeu Freitas de Abreu; Omid Taghizadeh; Razvan-Andrei Stoica; Takanori Hara 001; Koji Ishibashi (IEEE Access, 2021)

Robust Symbol Detection in Large-Scale Overloaded NOMA Systems. - Hiroki Iimori; Giuseppe Thadeu Freitas de Abreu; Takanori Hara 001; Koji Ishibashi; Razvan-Andrei Stoica; David González G.; Osvaldo Gonsa (IEEE Open J. Commun. Soc., 2021)

Hyperparameter-Free Receiver for Grant-Free NOMA Systems With MIMO-OFDM. - Takanori Hara 001; Hiroki Iimori; Koji Ishibashi (IEEE Wirel. Commun. Lett., 2021)

Grant-Free NOMA Using Time-Delay Domain for Low-Latency Massive Access over MIMO-OFDM. - Takanori Hara 001; Hiroki Iimori; Koji Ishibashi (ICC, 2022)

Iterative Activity Detection and Carrier Frequency Offset Estimation for Grant-Free NOMA. - Kohei Ueda; Takanori Hara 001; Koji Ishibashi (PIMRC, 2022)

Autonomous Decentralized User Association Method to Maximize Integrated System Throughput for Multi-service Coexistence. - Kazuma Matsumoto; Takanori Hara 001; Yasuaki Yuda; Kenichi Higuchi (VTC Fall, 2022)

Repetition-Based NOMA-HARQ with Adaptive Termination for URLLC. - Go Takita; Takanori Hara 001; Yasuaki Yuda; Kenichi Higuchi (VTC Fall, 2022)

HARQ Using Hierarchical Tree-Structured Random Access Identifiers with Random Retransmission Time Back-Off in NOMA-Based Random Access. - Katsuya Yanai; Takanori Hara 001; Nobuhide Nonaka; Kenichi Higuchi (VTC Fall, 2022)

Blind Multiple Measurement Vector AMP Based on Expectation Maximization for Grant-Free NOMA. - Takanori Hara 001; Koji Ishibashi (IEEE Wirel. Commun. Lett., 2022)

User-Centric Design of Millimeter Wave Communications for Beyond 5G and 6G. - Koji Ishibashi; Takanori Hara 001; Sota Uchimura; Tetsuya Iye; Yoshimi Fujii; Takahide Murakami; Hiroyuki Shinbo (IEICE Trans. Commun., 2022)

Integration of Index and Differential Modulation for Non-coherent Grant-free NOMA. - Eiji Yoshimura; Takanori Hara 001; Kenichi Higuchi (ACSSC, 2023)

Low-Complexity User-Centric AP Clustering Method in Downlink Cell-Free MIMO with Regularized ZF-Based Beamforming. - Kato Hiroki; Takanori Hara 001; Satoshi Suyama; Satoshi Nagata; Kenichi Higuchi (VTC Fall, 2023)

Clustering Method in Downlink Cell-Free MIMO Using Layered Partially Non-orthogonal ZF-Based Beamforming. - Daisuke Ishii; Takanori Hara 001; Nobuhide Nonaka; Kenichi Higuchi (VTC2023-Spring, 2023)

Energy-Efficient Frequency Block-Dependent Base Station Sleep Control Based on a Decentralized Probabilistic Approach. - Hiroya Kuwahara; Takanori Hara 001; Yuto Muroki; Satoshi Nagata; Kenichi Higuchi (VTC Fall, 2023)

NOMA-Based Highly-Efficient Low-Latency HARQ with Inter-Base Station Cooperation for URLLC. - Ryota Kobayashi; Takanori Hara 001; Yasuaki Yuda; Kenichi Higuchi (IEICE Trans. Commun., 2023)

Transmitter Filtering-aided Sparse Activity Detection for TDD-based Random Access. - Hiroki Fujimoto; Takanori Hara 001; Kenichi Higuchi (ICNC, 2024)

Peak Cancellation Signal-Based Parallel PAPR Reduction Method Using Low-Dimensional Null Space in Massive MIMO-OFDM. - Jun Saito; Takanori Hara 001; Kenichi Higuchi (ICNC, 2024)

Highly-Efficient Low-Latency Scheduling Method in Round-Trip Communication for Feedback Control. - Ryotaro Iizuka; Takanori Hara 001; Yasuaki Yuda; Kenichi Higuchi (VTC Spring, 2024)

Decentralized User Association Method to Maximize System-Level Throughput Satisfaction Rate in Co-existing Networks with HAPS and Terrestrial BSs. - Shoki Ikeda; Takanori Hara 001; Yuki Hokazono; Satoshi Suyama; Satoshi Nagata; Kenichi Higuchi (VTC Fall, 2024)

Autonomous Decentralized TRP Group Selection to Maximize System Throughput in Downlink Distributed MIMO System. - Koki Maeda; Takanori Hara 001; Satoshi Suyama; Satoshi Nagata; Kenichi Higuchi (VTC Fall, 2024)

Beam Selection Method Based on Angle-Domain Adaptive Beam Grouping for Massive MIMO Analog Beamforming Using NOMA in Cellular Downlink. - Azusa Matsumoto; Nobuhide Nonaka; Takanori Hara 001; Kenichi Higuchi (VTC Fall, 2024)

Distributed DQN-Based Frequency Block-Dependent Sleep Control of Base Stations for Improving Energy Efficiency Both in Up and Downlinks. - Yuma Shishido; Takanori Hara 001; Satoshi Suyama; Satoshi Nagata; Kenichi Higuchi (VTC Fall, 2024)

PAPR Reduction Using Average Transmit Signal Power Difference Among Transmit Antennas for Massive MIMO-OFDM with Uniform Planar Array. - Soma Taguchi; Takanori Hara 001; Satoshi Suyama; Satoshi Nagata; Kenichi Higuchi (VTC Spring, 2024)

Autonomous Decentralized TRP Group Selection and Bandwidth Allocation in Downlink Distributed MIMO with Overlapped TRP Group Configuration. - Yuta Yagi; Takanori Hara 001; Satoshi Suyama; Satoshi Nagata; Kenichi Higuchi (VTC Fall, 2024)

PAPR Reduction Method Based on Commonly Reserved Tones Among Multiple Users in FDMA Uplink. - Ryusei Yamazaki; Takanori Hara 001; Satoshi Suyama; Satoshi Nagata; Kenichi Higuchi (VTC Spring, 2024)

Base Station-Driven PAPR Reduction Method Utilizing Null Space for MIMO-OFDM Systems With Amplify-and-Forward Relaying. - Asuka Kakehashi; Takanori Hara 001; Kenichi Higuchi (IEEE Access, 2024)

Throughput Maximization-Based AP Clustering Methods in Downlink Cell-Free MIMO Under Partial CSI Condition. - Daisuke Ishii; Takanori Hara 001; Kenichi Higuchi (IEICE Trans. Commun., 2024)

Efficient Parallel PAPR Reduction Method Using Null-Constrained Peak Cancellation Signal for Massive MIMO-OFDM Systems. - Jun Saito; Takanori Hara 001; Kenichi Higuchi (IEEE Open J. Commun. Soc., 2024)

Efficient Channel Estimation Utilizing Channel Sparsity in the Delay Domain for OTFS Systems. - Masahiro Maruyama; Takanori Hara 001; Kenichi Higuchi (VTC2025-Spring, 2025)

Inter-Network Interference Coordination Using Protected Band in Co-existing Networks with HAPS and Terrestrial BSs. - Ryotaro Tsutsui; Takanori Hara 001; Yuki Hokazono; Satoshi Suyama; Satoshi Nagata; Kenichi Higuchi (WCNC, 2025)

Differential Modulation Based Non-Coherent Grant-Free NOMA Under Timing Offsets. - Eiji Yoshimura; Takanori Hara 001; Kohei Ueda; Koji Ishibashi; Kenichi Higuchi (WCNC, 2025)

Decentralized User Association Method to Minimize File Drop Rate in Co-existing Networks with HAPS and Terrestrial BSs. - Shoki Ikeda; Takanori Hara 001; Yuki Hokazono; Satoshi Suyama; Satoshi Nagata; Kenichi Higuchi (WPMC, 2025)

ICA-Based Grant-Free Access With DPSK-Aided Carrier Frequency Offset Compensation. - Mitsutoshi Nakata; Takanori Hara 001; Kenichi Higuchi (WPMC, 2025)

Enhancing Power Saving Effect and Suppressing Latency Increase of C-DRX Operation Through Base Station Sleep Control. - Yuma Shishido; Takanori Hara 001; Kenichi Higuchi (WPMC, 2025)

Adaptive Interference Restriction Among Spatial Streams Based on Difference in Singular Values for PAPR Reduction in Uplink Eigenmode Massive MIMO Transmission. - Yuta Abekura; Takanori Hara 001; Satoshi Suyama; Satoshi Nagata; Kenichi Higuchi (IEEE Access, 2025)

Exploiting Low-Density Signal Structure via Approximate Message Passing With Side Information for Grant-Free NOMA. - Kohei Ueda; Takanori Hara 001; Koji Ishibashi (IEEE Trans. Wirel. Commun., 2025)

Eigenvalue-Based Active User Enumeration for Grant-Free Access Under Carrier Frequency Offsets. - Takanori Hara 001 (IEEE Wirel. Commun. Lett., 2025)

Multiuser Diversity-Aware Autonomous Decentralized TRP Group Selection to Maximize System Throughput in Downlink Distributed MIMO. - Yuta Yagi; Takanori Hara 001; Satoshi Suyama; Satoshi Nagata; Kenichi Higuchi (ICOIN, 2026)

Autonomous Decentralized TRP Group Selection Method to Maximize System Throughput in Downlink Distributed MIMO with Overlapped TRP Group Configuration. - Yuta Yagi; Koki Maeda; Takanori Hara 001; Satoshi Suyama; Satoshi Nagata; Kenichi Higuchi (IEICE Trans. Commun., 2026)

Low-Complexity Channel Estimation for OTFS via Coordinate Descent Exploiting Delay-Domain Sparsity. - Masahiro Maruyama; Takanori Hara 001; Kenichi Higuchi (IEEE Open J. Commun. Soc., 2026)