Hiroki Iimori

Publication Activity (10 Years)

Years Active: 2017-2024
Publications (10 Years): 53

Top Topics

Sparse Reconstruction

Channel Estimation

Tensor Decomposition

Top Venues

IEEE Trans. Wirel. Commun.

Publications

Naoki Endo, Hiroki Iimori, Chandan Pradhan, Szabolcs Malomsoky, Naoki Ishikawa
Boosting Spectral Efficiency with Data-Carrying Reference Signals on the Grassmann Manifold. CoRR (2024)
Sota Uchimura, Koji Ishibashi, Hiroki Iimori, Paulo Valente Klaine, Szabolcs Malomsoky
Efficient Channel Tracking Based on Compressive Sensing for OFDM Millimeter-Wave Systems. IEEE Trans. Veh. Technol. 73 (8) (2024)
Naoki Endo, Hiroki Iimori, Chandan Pradhan, Szabolcs Malomsoky, Naoki Ishikawa
Boosting Spectral Efficiency With Data-Carrying Reference Signals on the Grassmann Manifold. IEEE Trans. Wirel. Commun. 23 (8) (2024)
Sota Uchimura, Hiroki Iimori, Giuseppe Thadeu Freitas de Abreu, Koji Ishibashi
Outage-Minimization Coordinated Multi-Point for Millimeter-Wave OFDM With Random Blockages. IEEE Trans. Veh. Technol. 72 (7) (2023)
Hiroki Iimori, Jörg Huschke, Joao Vieira
Radio Unit Configuration for Dynamic Time Division Duplex in Distributed MIMO Systems. GLOBECOM (2023)
Takumi Takahashi, Hiroki Iimori, Kengo Ando, Koji Ishibashi, Shinsuke Ibi, Giuseppe Thadeu Freitas de Abreu
Bayesian Receiver Design via Bilinear Inference for Cell-Free Massive MIMO With Low-Resolution ADCs. IEEE Trans. Wirel. Commun. 22 (7) (2023)
Yuta Kanazawa, Hiroki Iimori, Chandan Pradhan, Szabolcs Malomsoky, Naoki Ishikawa
Multiple Superimposed Pilots for Accurate Channel Estimation in Orthogonal Time Frequency Space Modulation. VTC Fall (2023)
Hiroki Iimori, Eito Kurihara, Takumi Yoshida, Joao Vieira, Szabolcs Malomsoky
Amplification Strategy in Repeater-Assisted MIMO Systems via Minorization Maximization. GLOBECOM (2023)
Yuya Nishi, Takumi Takahashi, Hiroki Iimori, Giuseppe Abreu, Shinsuke Ibi, Seiichi Sampei
Wireless Location Tracking via Complex-Domain Super MDS with Time Series Self-Localization Information. ICASSP (2023)
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. CISIS-ICEUTE (2022)
Shuto Fukue, Hiroki Iimori, Giuseppe Thadeu Freitas de Abreu, Koji Ishibashi
Joint Access Configuration and Beamforming for Cell-Free Massive MIMO Systems With Dynamic TDD. IEEE Access 10 (2022)
Kengo Ando, Hiroki Iimori, Giuseppe Thadeu Freitas de Abreu, Koji Ishibashi
User-Heterogeneous Cell-Free Massive MIMO Downlink and Uplink Beamforming via Tensor Decomposition. IEEE Open J. Commun. Soc. 3 (2022)
Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, Hiroki Iimori, David González G., Osvaldo Gonsa
Scalable Quadrature Spatial Modulation. IEEE Trans. Wirel. Commun. 21 (11) (2022)
Hiroki Iimori, Takumi Takahashi, Koji Ishibashi, Giuseppe Thadeu Freitas de Abreu, David González G., Osvaldo Gonsa
Joint Activity and Channel Estimation for Extra-Large MIMO Systems. IEEE Trans. Wirel. Commun. 21 (9) (2022)
Kengo Ando, Hiroki Iimori, Hyeon Seok Rou, Giuseppe Thadeu Freitas de Abreu, David González González, Osvaldo Gonsa
An Iterative Discrete Least Square Estimator with Dynamic Parameterization via Deep-Unfolding. IEEECONF (2022)
Takanori Hara, Hiroki Iimori, Koji Ishibashi
Grant-Free NOMA Using Time-Delay Domain for Low-Latency Massive Access over MIMO-OFDM. ICC (2022)
Hiroki Iimori, Takumi Takahashi, Hyeon Seok Rou, Koji Ishibashi, Giuseppe Thadeu Freitas de Abreu, David González G., Osvaldo Gonsa
Grant-Free Access for Extra-Large MIMO Systems Subject to Spatial Non-Stationarity. ICC (2022)
Omid Taghizadeh, Tianyu Yang, Hiroki Iimori, Giuseppe Abreu, Ali Cagatay Cirik, Rudolf Mathar
Quantization-Aided Secrecy: FD C-RAN Communications With Untrusted Radios. IEEE Trans. Wirel. Commun. 21 (10) (2022)
Takanori Hara, Hiroki Iimori, Koji Ishibashi
Hyperparameter-Free Receiver for Grant-Free NOMA Systems With MIMO-OFDM. IEEE Wirel. Commun. Lett. 10 (4) (2021)
Omid Taghizadeh, Tianyu Yang, Hiroki Iimori, Giuseppe Abreu, Ali Cagatay Cirik, Rudolf Mathar
Quantization-Aided Secrecy: FD C-RAN Communications with Untrusted Radios. CoRR (2021)
Hiroki Iimori, Takumi Takahashi, Koji Ishibashi, Giuseppe Thadeu Freitas de Abreu, Wei Yu
Grant-Free Access via Bilinear Inference for Cell-Free MIMO With Low-Coherence Pilots. IEEE Trans. Wirel. Commun. 20 (11) (2021)
Kengo Ando, Hiroki Iimori, Takumi Takahashi, Koji Ishibashi, Giuseppe Thadeu Freitas de Abreu
Uplink Signal Detection for Scalable Cell-Free Massive MIMO Systems With Robustness to Rate-Limited Fronthaul. IEEE Access 9 (2021)
Hiroki Iimori, Giuseppe Thadeu Freitas de Abreu, Omid Taghizadeh, Razvan-Andrei Stoica, Takanori Hara, Koji Ishibashi
A Stochastic Gradient Descent Approach for Hybrid mmWave Beamforming With Blockage and CSI-Error Robustness. IEEE Access 9 (2021)
Hiroki Iimori, Giuseppe Thadeu Freitas de Abreu, David González G., Osvaldo Gonsa
Mitigating Channel Aging and Phase Noise in Millimeter Wave MIMO Systems. IEEE Trans. Veh. Technol. 70 (7) (2021)
Omid Taghizadeh, Slawomir Stanczak, Hiroki Iimori, Giuseppe Thadeu Freitas de Abreu
Full-Duplex Amplify-and-Forward MIMO Relaying: Design and Performance Analysis Under Erroneous CSI and Hardware Impairments. IEEE Open J. Commun. Soc. 2 (2021)
Andre Saito Guerreiro, Hiroki Iimori, Koji Ishibashi
Low Latency Beam-Sweeping for Millimeter Wave Systems via Pessimistic Optimization. IEEE Wirel. Commun. Lett. 10 (12) (2021)
Hiroki Iimori, Giuseppe Thadeu Freitas de Abreu, Takanori Hara, Koji Ishibashi, Razvan-Andrei Stoica, David González G., Osvaldo Gonsa
Robust Symbol Detection in Large-Scale Overloaded NOMA Systems. IEEE Open J. Commun. Soc. 2 (2021)
Omid Taghizadeh, Slawomir Stanczak, Hiroki Iimori, Giuseppe Abreu
Full-Duplex Amplify-and-Forward MIMO Relaying: Impairments Aware Design and Performance Analysis. CoRR (2020)
Hiroki Iimori, Giuseppe Thadeu Freitas de Abreu, Koji Ishibashi
Full-Duplex MIMO Systems with Hardware Limitations and Imperfect Channel Estimation. GLOBECOM (2020)
Ryo Okabe, Hiroki Iimori, Koji Ishibashi
Low-Complexity Robust Beamforming with Blockage Prediction for Millimeter-Wave Communications. APSIPA (2020)
Naoya Hirosawa, Hiroki Iimori, Koji Ishibashi, Giuseppe Thadeu Freitas de Abreu
Minimizing Age of Information in Energy Harvesting Wireless Sensor Networks. IEEE Access 8 (2020)
Omid Taghizadeh, Slawomir Stanczak, Hiroki Iimori, Giuseppe Abreu
Full-Duplex AF MIMO Relaying: Impairments Aware Design and Performance Analysis. GLOBECOM (2020)
Hiroki Iimori, Razvan-Andrei Stoica, Giuseppe Thadeu Freitas de Abreu, G. David Gonzalez, Andreas Andrae, Osvaldo Gonsa
Discreteness-aware Receivers for Overloaded MIMO Systems. CoRR (2020)
Hiroki Iimori, Giuseppe Thadeu Freitas de Abreu, Omid Taghizadeh, Koji Ishibashi
Discrete-Aware Matrix Completion via Proximal Gradient. ACSSC (2020)
Hiroki Iimori, Giuseppe Thadeu Freitas de Abreu, Omid Taghizadeh, Razvan-Andrei Stoica, Takanori Hara, Koji Ishibashi
Stochastic Learning Robust Beamforming for Millimeter-Wave Systems With Path Blockage. IEEE Wirel. Commun. Lett. 9 (9) (2020)
Takanori Hara, Hiroki Iimori, Koji Ishibashi
Activity Detection for Uplink Grant-Free NOMA in the Presence of Carrier Frequency Offsets. ICC Workshops (2020)
Hiroki Iimori, Razvan-Andrei Stoica, Koji Ishibashi, Giuseppe Thadeu Freitas de Abreu
Robust Sparse Reconstruction of mmWave Channel Estimates via Fractional Programming. ICOIN (2020)
Razvan-Andrei Stoica, Hiroki Iimori, Giuseppe Thadeu Freitas de Abreu, Koji Ishibashi
Frame Theory and Fractional Programming for Sparse Recovery-Based mmWave Channel Estimation. IEEE Access 7 (2019)
Razvan-Andrei Stoica, Hiroki Iimori, Giuseppe Thadeu Freitas de Abreu
Multiuser Detection for Large Massively Concurrent NOMA Systems via Fractional Programming. CAMSAP (2019)
Hiroki Iimori, Giuseppe Abreu, Koji Ishibashi
Fractional Programming for Robust TX BF Design in Multi-User/Single-Carrier PD-NOMA. WiOpt (2019)
Naoya Hirosawa, Hiroki Iimori, Giuseppe Thadeu Freitas de Abreu, Koji Ishibashi
Age-of-Information Minimization in Two-User Multiple Access Channel with Energy Harvesting. CAMSAP (2019)
Hiroki Iimori, Giuseppe Thadeu Freitas de Abreu, George C. Alexandropoulos
MIMO Beamforming Schemes for Hybrid SIC FD Radios With Imperfect Hardware and CSI. IEEE Trans. Wirel. Commun. 18 (10) (2019)
Razvan-Andrei Stoica, Hiroki Iimori, Giuseppe Thadeu Freitas de Abreu
Sparsely-structured Multiuser Detection for Large Massively Concurrent NOMA Systems. ACSSC (2019)
Hiroki Iimori, Giuseppe Abreu, David González G., Osvaldo Gonsa
Joint Detection in Massive Overloaded Wireless Systems via Mixed-Norm Discrete Vector Decoding. ACSSC (2019)
Hiroki Iimori, Giuseppe Abreu, Koji Ishibashi, George C. Alexandropoulos
Transmission Strategies in Imperfect Bi-directional Full-Duplex MIMO Systems. WCNC (2019)
Hiroki Iimori, Giuseppe Abreu, George C. Alexandropoulos
Full-Duplex Bi-directional MIMO under Imperfect CSI and Hardware Impairments. WPNC (2018)
Hiroki Iimori, Giuseppe Abreu, George C. Alexandropoulos
Full-Duplex Transmission Optimization for Bi-directional MIMO links with QoS Guarantees. GlobalSIP (2018)
Hiroki Iimori, Giuseppe Thadeu Freitas de Abreu
Two-Way Full-Duplex MIMO with Hybrid TX-RX MSE Minimization and Interference Cancellation. SPAWC (2018)
Hiroki Iimori, Giuseppe Thadeu Freitas de Abreu
Performance Analysis of Non-Linear Wireless Communications in Ultra Dense Networks. ICC Workshops (2018)
Razvan-Andrei Stoica, Giuseppe Thadeu Freitas de Abreu, Hiroki Iimori
A Frame-Theoretic Scheme for Robust Millimeter Wave Channel Estimation. VTC Fall (2018)
Hiroki Iimori, Giuseppe Thadeu Freitas de Abreu
Rate-optimal communication under nonlinear Gaussian noise via constellation shaping. WCNC (2018)
Hiroki Iimori, Giuseppe Abreu, George C. Alexandropoulos
Full-Duplex Transmission Optimization for Bi-directional MIMO links with QoS Guarantees. CoRR (2018)
Hiroki Iimori, Razvan-Andrei Stoica, Giuseppe Thadeu Freitas de Abreu
Constellation shaping for rate maximization in AWGN channels with non-linear distortion. CAMSAP (2017)