Coherent reception and 126 GHz bandwidth digital signal processing of CO-OFDM superchannel generated by fiber frequency conversion. - Takahito Tanimura; Tomoyuki Kato; Ryo Okabe; Shoichiro Oda; Thomas Richter 004; Robert Elschner; Carsten Schmidt-Langhorst; Colja Schubert; Jens C. Rasmussen; Shigeki Watanabe (OFC, 2014)

Unrepeated 100 km SMF transmission of 110.3 Gbps/lambda DMT signal. - Ryo Okabe; Bo Liu 060; Masato Nishihara; Toshiki Tanaka; Tomoo Takahara; Lei Li 041; Zhenning Tao; Jens C. Rasmussen (ECOC, 2015)

100G beyond Ethernet transport for inter- and intra-DCN communication with solutions and optical enabling technologies in the ICT STRAUSS project. - Shuangyi Yan; Shuping Peng 001; Yan Yan 019; Bijan Rahimzadeh Rofoee; Yi Shu; Emilio Hugues-Salas; Georgios Zervas; Dimitra Simeonidou; Michela Svaluto Moreolo; Josep M. Fabrega; Laia Nadal; Yuki Yoshida; et al. (EuCNC, 2015)

Smart Device-Based Multimodal Biometric Authentication with the Function for Environment Recognition. - Ryo Okabe; Yasushi Yamazaki (CANDAR, 2015)

130-Gbps DMT transmission using silicon Mach-Zehnder modulator with chirp control at 1.55-µm. - Yutaka Kai; Masato Nishihara; Toshiki Tanaka; Ryo Okabe; Tomoo Takahara; Jens C. Rasmussen; Hiroki Ishihara; Kazuhiro Goi; Kensuke Ogawa (OFC, 2015)

First demonstration of cognitive SDN orchestration: A real-time congestion-aware services provisioning over OFDM-based 400G OPS and Flexi-WDM OCS networks. - Yuki Yoshida; Ken-ichi Kitayama; Y. Kai; Masato Nishihara; Ryo Okabe; Toshiki Tanaka; Tomoo Takahara; Jens C. Rasmussen; Noboru Yoshikane; Xiaoyuan Cao; Takehiro Tsuritani; Itsuro Morita; et al. (OFC, 2016)

Low-Complexity Robust Beamforming with Blockage Prediction for Millimeter-Wave Communications. - Ryo Okabe; Hiroki Iimori; Koji Ishibashi (APSIPA, 2020)

Avoiding Year 2038 Problem on 32-bit Linux by Rewinding Time on Clock Synchronization. - Ryo Okabe; Jun Yabuki; Masakatsu Toyama (ETFA, 2020)

Phased Human Activity Recognition based on GPS. - Ryoichi Sekiguchi; Kenji Abe; Shogo Suzuki; Masayasu Kumano; Daisuke Asakura; Ryo Okabe; Takeru Kariya; Masaki Kawakatsu (UbiComp/ISWC Adjunct, 2021)