A Voltage Controlled Oscillator with Up Mode Type Miller-Integrator. - Mitsutoshi Yahara; Kuniaki Fujimoto; Hirofumi Sasaki (IEICE Trans. Electron., 2005)

An Implementation of the Neuro-fuzzy Inference Circuit. - Kuniaki Fujimoto; Hirofumi Sasaki; Yoichiro Masaoka; Ren-Qi Yang; Masaharu Mizumoto (ICICIC (2), 2006)

All Digital Dividing Ratio Changeable PLL Using Delay Clock Pulse with Low Jitter. - Mitsutoshi Yahara; Kuniaki Fujimoto; Hirofumi Sasaki; Takashi Shibuya; Yoshinori Higashi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2006)

Design of a Multiple-Input SC DC-DC Converter Realizing Long Battery Runtime. - Kei Eguchi; Sawai Pongswatd; Amphawan Julsereewong; Kitti Tirasesth; Hirofumi Sasaki; Takahiro Inoue (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2010)

Joint SDA-MAP Estimation of Channel and Interference Power in Superposed OFDM Transmission. - Yuto Kakizaki; Tomoaki Ohtsuki; Pooi-Yuen Kam; Kouhei Suzaki; Hirofumi Sasaki; Hideya So (GLOBECOM, 2017)

Q-learning based superposed band detection in multicarrier transmission. - Ali Shaikh; Fereidoun H. Panahi; Tomoaki Ohtsuki; Kouhei Suzaki; Hirofumi Sasaki; Hideya So; Tadao Nakagawa (ICC, 2017)

Orbital Angular Momentum (OAM) Multiplexing: An Enabler of a New Era of Wireless Communications. - Doohwan Lee; Hirofumi Sasaki; Hiroyuki Fukumoto; Ken Hiraga; Tadao Nakagawa (IEICE Trans. Commun., 2017)

Experiment on Over-100-Gbps Wireless Transmission with OAM-MIMO Multiplexing System in 28-GHz Band. - Hirofumi Sasaki; Doohwan Lee; Hiroyuki Fukumoto; Yasunori Yagi; Takana Kaho; Hiroyuki Shiba; Takashi Shimizu (GLOBECOM, 2018)

An Experimental Demonstration of 28 GHz Band Wireless OAM-MIMO (Orbital Angular Momentum Multi-Input and Multi-Output) Multiplexing. - Doohwan Lee; Hirofumi Sasaki; Hiroyuki Fukumoto; Yasunori Yagi; Takana Kaho; Hiroyuki Shiba; Takashi Shimizu (VTC Spring, 2018)

Field Experimental Demonstration on OAM-MIMO Wireless Transmission on 28 GHz Band. - Hirofumi Sasaki; Yasunori Yagi; Takayuki Yamada; Doohwan Lee (GLOBECOM Workshops, 2019)

200 Gbit/s Wireless Transmission Using Dual-Polarized OAM-MIMO Multiplexing on 28 GHz Band. - Yasunori Yagi; Hirofumi Sasaki; Takayuki Yamada; Doohwan Lee (GLOBECOM Workshops, 2019)

Hybrid OAM Multiplexing using Butler Matrices toward over 100 Gbit/s Wireless Transmission. - Hirofumi Sasaki; Yasunori Yagi; Takayuki Yamada; Tomoki Semoto; Doohwan Lee (GLOBECOM (Workshops), 2020)

Multipath and Receiver Aperture Effects in a THz Wireless Communications Link using OAM Multiplexing. - Xinzhou Su; Runzhou Zhang; Zhe Zhao 003; Hao Song 006; Amir Minoofar; Nanzhe Hu; Huibin Zhou; Kaiheng Zou; Kai Pang; Haoqian Song; Brittany Lynn; Shlomo Zach; et al. (GLOBECOM (Workshops), 2020)

An Experimental Demonstration of over 100 Gbit/s OAM Multiplexing Transmission at a Distance of 100 m on 40 GHz Band. - Hirofumi Sasaki; Yasunori Yagi; Takayuki Yamada; Tomoki Semoto; Doohwan Lee (ICC Workshops, 2020)

Experimental Demonstration of Free-Space sub-THz Communications Link Using Multiplexing of Beams Having Two Different LG Modal Indices. - Amir Minoofar; Xinzhou Su; Huibin Zhou; Fatemeh Alishahi; Kai Pang; Kaiheng Zou; Runzhou Zhang; Shlomo Zach; Moshe Tur; Andreas F. Molisch; Hirofumi Sasaki; Doohwan Lee; et al. (ECOC, 2021)

Modal Purity and LG Coupling of an OAM Beam Reflected by a Rough Surface for NLoS THz Links. - Xinzhou Su; Nanzhe Hu; Amir Minoofar; Hao Song 006; Huibin Zhou; Zhe Zhao 003; Runzhou Zhang; Kai Pang; Cong Liu 010; Kaiheng Zou; Haoqian Song; Brittany Lynn; et al. (ICC Workshops, 2021)

Field Experiment of 117 Gbit/s Wireless Transmission Using OAM Multiplexing at a Distance of 200 m on 40 GHz Band. - Yasunori Yagi; Hirofumi Sasaki; Tomoki Semoto; Tomoya Kageyama; Takayuki Yamada; Jun Mashino; Doohwan Lee (ICC Workshops, 2021)

Demonstration of 8-Channel 32-Gbit/s QPSK Wireless Communications at 0.28-0.33 THz Using 2 Frequency, 2 Polarization, and 2 Mode Multiplexing. - Xinzhou Su; Huibin Zhou; Kaiheng Zou; Amir Minoofar; Hao Song 006; Runzhou Zhang; Kai Pang; Haoqian Song; Nanzhe Hu; Zhe Zhao 003; Ahmed Almaiman; Shlomo Zach; et al. (OFC, 2021)

Implementation and Evaluation of sub- THz OAM Multiplexing Transmission. - Hirofumi Sasaki; Yasunori Yagi; Tomoya Kageyama; Doohwan Lee (ICC Workshops, 2022)

Prototyping of 40 GHz Band Orbital Angular Momentum Multiplexing System and Evaluation of Field Wireless Transmission Experiments. - Yasunori Yagi; Hirofumi Sasaki; Doohwan Lee (IEEE Access, 2022)

Parabolic Reflector for UCA-based OAM Multiplexing in Sub-THz Band and Transmission Experiment. - Yasunori Yagi; Hirofumi Sasaki; Riichi Kudo; Doohwan Lee (GLOBECOM (Workshops), 2023)

Demonstration of 1.44 Tbit/s OAM Multiplexing Transmission in Sub-THz Bands. - Hirofumi Sasaki; Yasunori Yagi; Riichi Kudo; Doohwan Lee (ICC Workshops, 2023)

Off-axis Reflector Antenna for OAM-MIMO Multiplexing Transmission and Its Experimental Evaluation in the Sub-THz Band. - Hirofumi Sasaki; Yasunori Yagi; Riichi Kudo; Doohwan Lee (GLOBECOM, 2024)

Towards 6G Evolution: Three Enhancements, Three Innovations, and Three Major Challenges. - Rohit Singh 008; Aryan Kaushik; Wonjae Shin; Marco Di Renzo; Vincenzo Sciancalepore; Doohwan Lee; Hirofumi Sasaki; Arman Shojaeifard; Octavia A. Dobre (CoRR, 2024)

OAM-MIMO Multiplexing Transmission System for High-Capacity Wireless Communications on Millimeter-Wave Band. - Hirofumi Sasaki; Yasunori Yagi; Hiroyuki Fukumoto; Doohwan Lee (IEEE Trans. Wirel. Commun., 2024)

1.58 Tbps OAM Multiplexing Wireless Transmission With Wideband Butler Matrix for Sub-THz Band. - Hirofumi Sasaki; Yasunori Yagi; Riichi Kudo; Doohwan Lee (IEEE J. Sel. Areas Commun., 2024)