A study of laser white and brownian FM Noise in coherent QPSK signals. - Keisuke Matsuda; Hiroshi Bessho; Kiyotomo Hasegawa; Tsuyoshi Yoshida; Kazuyuki Ishida (OFC, 2014)

XPolM compensation by two-stage phase recovery for baud-rate optimized nonlinear transmission. - Keisuke Matsuda; Tsuyoshi Yoshida; Kenichi Uto (OFC, 2016)

Hardware-efficient Adaptive Equalization and Carrier Phase Recovery for 100 Gb/sM-based Coherent WDM-PON Systems. - Keisuke Matsuda; Ryosuke Matsumoto; Naoki Suzuki (ECOC, 2017)

Burst-Mode Coherent Detection Using Fast-Fitting Pilot Sequence for 100-Gb/sM Coherent TDM-PON System. - Ryosuke Matsumoto; Keisuke Matsuda; Naoki Suzuki (ECOC, 2017)

100G to 1T based Coherent PON Technology. - Naoki Suzuki; Hiroshi Miura; Keisuke Matsuda; Ryosuke Matsumoto; Kuniaki Motoshima (ECOC, 2017)

Nonlinearity-tolerant time domain hybrid modulation for 4-8 bits/symbol based on 2A8PSK. - Keisuke Kojima; Tsuyoshi Yoshida; Kieran Parsons; Toshiaki Koike-Akino; David S. Millar; Keisuke Matsuda (OFC, 2017)

Hardware-Efficient Signal Processing Technologies for Coherent PON Systems. - Keisuke Matsuda; Ryosuke Matsumoto; Hiroshi Miura; Kiyoshi Onohara; Naoki Suzuki (ECOC, 2018)

Comparison of Nonlinearity Tolerance of Modulation Formats for Subcarrier Modulation. - Keisuke Kojima; Tsuyoshi Yoshida; Kieran Parsons; Toshiaki Koike-Akino; David S. Millar; Keisuke Matsuda (OFC, 2018)

Fast, Low-Complexity Widely-Linear Compensation for IQ Imbalance in Burst-Mode 100-Gb/s/λ Coherent TDM-PON. - Ryosuke Matsumoto; Keisuke Matsuda; Naoki Suzuki (OFC, 2018)

Experimental Comparison of Pulse Position and Hamming-Coded Modulations for High Sensitivity Coherent FSO Communications. - Keisuke Matsuda; Shota Koshikawa; Masashi Binkai; Tsuyoshi Yoshida; Naoki Suzuki (OECC/PSC, 2019)

Required and Received SNRs in Coded Modulation. - Tsuyoshi Yoshida; Koji Igarashi; Masashi Binkai; Shun Chikamori; Mikael Mazur; Jochen Schröder; Keisuke Matsuda; Shota Koshikawa; Naoki Suzuki; Magnus Karlsson 001; Erik Agrell (ECOC, 2020)

Field Demonstration of Real-time 14 Tb/s 220 m FSO Transmission with Class 1 Eye-safe 9-aperture Transmitter. - Keisuke Matsuda; Masashi Binkai; Shota Koshikawa; Tsuyoshi Yoshida; Hayato Sano; Yoshiaki Konishi; Naoki Suzuki (OFC, 2021)

Simplified Digital Coherent Technologies for Beyond 100G Optical Access Systems in the B5G/6G era. - Naoki Suzuki; Hiroshi Miura; Keita Mochizuki; Keisuke Matsuda (OFC, 2021)

Real-time Doppler-Shift Compensation in FPGA-Based Optical Transceiver Prototype. - Masashi Binkai; Keisuke Matsuda; Yuta Yokomura; Hayato Sano; Tsuyoshi Yoshida; Yoshiaki Konishi (OECC/PSC, 2022)

Digital Coherent based PON Technologies and Beyond-100G Optical Access Systems. - Naoki Suzuki; Hiroshi Miura; Keita Mochizuki; Keisuke Matsuda (OECC/PSC, 2022)

Interplay of Probabilistically Shaped Multilevel Coded Modulation and Fiber Nonlinearity Compensation. - Tsuyoshi Yoshida; Takashi Inoue; Masashi Binkai; Keisuke Matsuda; Shota Koshikawa; Yoshiaki Konishi; Naoki Suzuki (OECC/PSC, 2022)

Virtual Optical Channels: Network-Sliced Transmission with Ultra-Wideband Interface. - Tsuyoshi Yoshida; Keisuke Matsuda; Hayato Sano; Yukari Takada; Yuta Yokomura; Masashi Binkai; Yoshiaki Konishi; Naoki Suzuki (OECC/PSC, 2022)

Simplified digital coherent-based beyond-100G optical access systems for B5G/6G [Invited]. - Naoki Suzuki; Hiroshi Miura; Keita Mochizuki; Keisuke Matsuda (JOCN, 2022)