Methods for Achieving Integrated Operation in a High-Performance Optical Loop Intercomputer Communications System. - Masahiro Kurata; Seishiro Tsuruho; Takafumi Isogawa; Hisao Nakashima (FJCC, 1986)

Advanced and feasible signal processing algorithm for nonlinear mitigation. - Takeshi Hoshida; Liang Dou; Weizhen Yan; Lei Li 041; Zhenning Tao; Shoichiro Oda; Hisao Nakashima; Chihiro Ohshima; Tomofumi Oyama; Jens C. Rasmussen (OFC/NFOEC, 2013)

Impact of pulse shaping and transceiver electrical bandwidths on nonlinear compensated transmission. - Tomofumi Oyama; Takeshi Hoshida; Hisao Nakashima; Chihiro Ohshima; Zhenning Tao; Jens C. Rasmussen (OFC/NFOEC, 2013)

Digital nonlinear compensation for spectrally efficient superchannel transmission at 400Gbit/s and beyond. - Takeshi Hoshida; Takahito Tanimura; Tomofumi Oyama; Shoichiro Oda; Hisao Nakashima; Yangyang Fan; Liang Dou; Zhenning Tao; Jens C. Rasmussen (ECOC, 2014)

Impact of fiber nonlinearity on duobinary-QPSK in super-Nyquist WDM transmission. - Tomofumi Oyama; Takahito Tanimura; Hisao Nakashima; Takeshi Hoshida; Zhenning Tao; Jens C. Rasmussen (ECOC, 2014)

Soft decision forward error correction over nonlinear transmission of 1-Tb/s superchannel. - Takahito Tanimura; Yohei Koganei; Hisao Nakashima; Takeshi Hoshida; Jens C. Rasmussen (ECOC, 2014)

Robust and efficient receiver-side compensation method for intra-channel nonlinear effects. - Tomofumi Oyama; Hisao Nakashima; Shoichiro Oda; Tomohiro Yamauchi; Zhenning Tao; Takeshi Hoshida; Jens C. Rasmussen (OFC, 2014)

Three Benefits Brought by Perturbation Back-Propagation Algorithm in 224Gb/s DP-16QAM Transmission. - Shoichiro Oda; Takahito Tanimura; Takeshi Hoshida; Yuichi Akiyama; Hisao Nakashima; Kyosuke Sone; Zhenning Tao; Jens C. Rasmussen (IEICE Trans. Commun., 2014)

Experimental investigation on nonlinear tolerance of subcarrier multiplexed signals with spectrum optimization. - Hisao Nakashima; Takahito Tanimura; Tomofumi Oyama; Yuichi Akiyama; Takeshi Hoshida; Jens C. Rasmussen (ECOC, 2015)

Nonlinear mitigation technique using subcarrier power pre-emphasis and digital nonlinear compensation in superchannel transmission. - Tomohiro Yamauchi; Olga Vassilieva; Shoichiro Oda; Inwoong Kim; Chihiro Ohshima; Hisao Nakashima; Takeshi Hoshida; Yasuhiko Aoki; Motoyoshi Sekiya; Yuichi Akiyama; Jens C. Rasmussen (ECOC, 2015)

Complexity reduction of perturbation-based nonlinear compensator by sub-band processing. - Tomofumi Oyama; Hisao Nakashima; Takeshi Hoshida; Takahito Tanimura; Yuichi Akiyama; Zhenning Tao; Jens C. Rasmussen (OFC, 2015)

PDL-tolerant signal generation by digital spectrum slicing and polarization control. - Takahito Tanimura; Tomofumi Oyama; Hisao Nakashima; Jens C. Rasmussen (OFC, 2015)

An Accurate and Robust In-phase/Quadrature Skew Measurement for Coherent Optical Transmitter by Image Spectrum Analyzing. - Hao Chen 058; Xiaofei Su; Zhenning Tao; Tomofumi Oyama; Hisao Nakashima; Takeshi Hoshida; Kazutoshi Kato (ECOC, 2017)

Autonomous and Real-time Controlled Transceiver Prototype with FSK Supervisory Signal and Performance Monitoring. - Yi Ge; Shoichiro Oda; Ying Zhao; Guoxiu Huang; Setsuo Yoshida; Hisao Nakashima; Yuichi Akiyama; Yoshio Hirose; Zhenning Tao; Takeshi Hoshida (ECOC, 2017)

Polarization Dependent Loss Monitor with Visualization on Poincaré Sphere in Digital Coherent System. - Guoxiu Huang; Shoichiro Oda; Yuichi Akiyama; Hiroyuki Irie; Setsuo Yoshida; Hisao Nakashima; Takeshi Hoshida (ECOC, 2017)

Digital nonlinear compensation technologies in coherent optical communication systems. - Hisao Nakashima; Tomofumi Oyama; Chihiro Ohshima; Yuichi Akiyama; Zhenning Tao; Takeshi Hoshida (OFC, 2017)

Reach extension with 32- and 64 GBaud single carrier vs. multi-carrier signals. - Olga Vassilieva; Inwoong Kim; Tomofumi Oyama; Shoichiro Oda; Hisao Nakashima; Takeshi Hoshida; Tadashi Ikeuchi (OFC, 2017)

400Gbit/s/ch Field Demonstration of Modulation Format Adaptation Based on Pilot-Aided OSNR Estimation Using Real-Time DSP. - Seiji Okamoto; Kazushige Yonenaga; Kengo Horikoshi; Mitsuteru Yoshida; Yutaka Miyamoto; Masahito Tomizawa; Takeshi Okamoto; Hidemi Noguchi; Jun-ichi Abe; Junichiro Matsui; Hisao Nakashima; Yuichi Akiyama; et al. (IEICE Trans. Commun., 2017)

Experimental Verification of IQ Imbalance Monitor for High-Order Modulated Transceivers. - Yangyang Fan; Xiaofei Su; Hao Chen 058; Junpeng Liang; Zhenning Tao; Hisao Nakashima; Takeshi Hoshida (ECOC, 2018)

Efficient Polarization Dependent Loss Monitoring and Compensation in Coherent Transmission System. - Guoxiu Huang; Yuichi Akiyama; Tomohiro Yamauchi; Shoichiro Oda; Tomofumi Oyama; Hisao Nakashima; Takeshi Hoshida (ECOC, 2018)

PDL Mitigation by Polarization-Time Codes with Simple Decoding and Pilot-Aided Demodulation. - Tomofumi Oyama; Hisao Nakashima; Yoshitaka Nomura; Guoxiu Huang; Takahito Tanimura; Takeshi Hoshida (ECOC, 2018)

Multilevel Coding with Spatially-Coupled Codes for beyond 400Gbps Optical Transmission. - Yohei Koganei; Tomofumi Oyama; Kiichi Sugitani; Hisao Nakashima; Takeshi Hoshida (OFC, 2018)

A Simple, Robust Two-Tone Method to Measure the Dynamic Nonlinear Characteristics of Phase Shifter in Silicon Mach-Zehnder Modulator. - Tong Ye; Yanhui Qi; Hao Chen 058; Zhenning Tao; Tomofumi Oyama; Hisao Nakashima; Takeshi Hoshida; Haowen Shu; Xingjun Wang (OFC, 2018)

Optimum Bit-Level Distribution Matching with at Most O(N3) Implementation Complexity. - Yohei Koganei; Kiichi Sugitani; Hisao Nakashima; Takeshi Hoshida (OFC, 2019)

Low-Complexity, Low-PAPR Polarization-Time Code for PDL Mitigation. - Tomofumi Oyama; Guoxiu Huang; Hisao Nakashima; Yoshitaka Nomura; Tomoo Takahara; Takeshi Hoshida (OFC, 2019)

A Polarization Change Monitor by Eigenvalue Analysis in Coherent Receiver. - Tong Ye; Xiaofei Su; Ke Zhang; Zhenning Tao; Guoxiu Huang; Hisao Nakashima; Takeshi Hoshida (OFC, 2019)

Transceiver IQ imperfection Monitor by Digital Signal Processing in Coherent Receiver. - Yangyang Fan; Yufeng Jiang; Junpeng Liang; Zhenning Tao; Hisao Nakashima; Takeshi Hoshida (OECC/PSC, 2019)

Polarization Change Monitor Based on Jointly Applied Constant Modulus Algorithm and Carrier Phase Recovery in Coherent Receiver. - Yanhui Qi; Tong Ye; Yangyang Fan; Zhenning Tao; Guoxiu Huang; Hisao Nakashima; Takeshi Hoshida (OECC/PSC, 2019)

Partial Multilevel Coding with Probabilistic Shaping for Low-power Optical Transmission. - Kiichi Sugitani; Yohei Koganei; Tomofumi Oyama; Hisao Nakashima (OECC/PSC, 2019)

Up to 115GBaud Faster Than Nyquist PDM-64QAM Based on Tomlinson-Harashima Precoding with Single DAC. - Guoxiu Huang; Hisao Nakashima; Yuichi Akiyama; Takeshi Hoshida (ECOC, 2020)

Side Effect of Normal Vector Recovery based Polarization Demultiplexing in Stokes Space and the Countermeasure. - Jingnan Li; Yangyang Fan; Zhenning Tao; Hisao Nakashima; Takeshi Hoshida (ECOC, 2020)

Advanced DSP for Monitoring and Mitigation in Optical Transport Networks. - Takeshi Hoshida; Takahito Tanimura; Shoichiro Oda; Setsuo Yoshida; Hisao Nakashima; Guoxiu Huang; Zhenning Tao (OFC, 2020)

A Method to Separate the Penalties Caused by Various Nonlinear Signal-Pump Impairments in Raman Amplified System. - Jingnan Li; Yangyang Fan; Zhenning Tao; Tong Ye; Hiroyuki Irie; Hisao Nakashima; Kousuke Komaki; Takeshi Hoshida (OFC, 2020)

Polarization Change Monitor Based on Geometrical Analysis in Stokes Space. - Jingnan Li; Yangyang Fan; Zhenning Tao; Hisao Nakashima; Takeshi Hoshida (ECOC, 2021)

The Interaction Between Pilot Based Linear Equalizer and Device Nonlinearity in Optical Coherent Communication. - Xiaofei Su; Ke Zhang; Tong Ye; Zhenning Tao; Hisao Nakashima; Takeshi Hoshida (ECOC, 2021)

Characterization, Modelling and Measurement of Device Imperfections in Advanced Coherent Transceivers. - Zhenning Tao; Yangyang Fan; Tong Ye; Xiaofei Su; Hisao Nakashima; Takeshi Hoshida (ECOC, 2021)

In-field Calibration of Phase Response of Optical Transmitter Using Built-in Monitor Photodiode. - Yangyang Fan; Zhenning Tao; Hisao Nakashima; Takeshi Hoshida (OFC, 2021)

How to Connect Device Nonlinear Specification and System Nonlinear Penalty. - Zhenning Tao; Ke Zhang; Chengwu Yang; Xiaofei Su; Tong Ye; Hisao Nakashima; Takeshi Hoshida (OFC, 2022)

Probabilistic vs. Geometric Constellation Shaping in Commercial Applications. - Olga Vassilieva; Inwoong Kim; Hiroyuki Irie; Yohei Koganei; Hisao Nakashima; Yuichi Akiyama; Takeshi Hoshida; Paparao Palacharla (OFC, 2022)

A Simple and Accurate Method to Estimate the Nonlinear Performance of VCSEL IM-DD System. - Chengwu Yang; Tong Ye; Ke Zhang; Zhenning Tao; Hisao Nakashima; Takeshi Hoshida (OFC, 2022)

Faster than Nyquist PDM-16QAM Modulation with Low Resolution and Low Speed DAC. - Guoxiu Huang; Hisao Nakashima; Takeshi Hoshida (OECC/PSC, 2022)

A Sensitive Method for Estimating the Linear Length of a System. - Chengwu Yang; Tong Ye; Ke Zhang; Zhenning Tao; Hisao Nakashima; Takeshi Hoshida (OECC/PSC, 2022)

Nonlinear Distortion Identification for Coherent Optical Communication. - Ke Zhang; Zhenning Tao; Chengwu Yang; Hisao Nakashima; Takeshi Hoshida (OECC/PSC, 2022)

1.96Tbps and 256-Gbaud Dual-carrier Faster than Nyquist Signal Transmission Using Two Narrow-bandwidth Modulators and Single Coherent Receiver. - Guoxiu Huang; Hisao Nakashima; Jun Matsui; Yohei Sobu; Shinsuke Tanaka; Takeshi Hoshida (OFC, 2023)

Distortion Analysis and Equivalent Multiplicative and Additive Noise Model for High-Speed DAC and ADC. - Xiaofei Su; Tone Ye; Ke Zhang; Chengwu Yang; Hisao Nakashima; Takeshi Hoshida; Zhenning Tao (OFC, 2023)

Calibration of High-Speed Time-Interleaving DAC. - Ke Zhang; Xiaofei Su; Hisao Nakashima; Takeshi Hoshida; Zhenning Tao (OFC, 2023)

240GBd-16QAM Single-Carrier Coherent Transmission over 120km SSMF for a Bandwidth Limited System with 1sps Speed and Simple DSP. - Guoxiu Huang; Yo Nakamura; Hisao Nakashima; Takeshi Hoshida (OFC, 2024)

Clock Recovery of a 180 Gbaud Faster-than-Nyquist Signal Enabled by a Novel Adaptive Equalizer-Aided Algorithm. - Yo Nakamura; Guoxiu Huang; Hisao Nakashima; Takeshi Hoshida (OFC, 2024)

Impact of Symbol Rate Optimization and Laser Frequency Stability on Transmission Reach of Super-Channel Transceiver Configurations for Beyond 1.6 Tb/s. - Olga Vassilieva; Inwoong Kim; Hiroyuki Irie; Hisao Nakashima; Takeshi Hoshida; Paparao Palacharla (OFC, 2024)

Distortion Characterization and Performance Estimation of Time-interleaved DAC and ADC Based on the Measurement of Nonlinear Noise Spectrum. - Tong Ye; Ke Zhang; Xiaofei Su; Jingnan Li; Hisao Nakashima; Takeshi Hoshida; Zhenning Tao (OFC, 2024)

Deep-Depth Probability-Maintained Notch Sequences for PAM. - Jingnan Li; Tong Ye; Xiaofei Su; Yangyang Fan; Ke Zhang; Shiyu Shi; Hisao Nakashima; Takeshi Hoshida; Zhenning Tao; Yojiro Mori; Hiroshi Hasegawa (IEEE DataPort, 2024)

Advanced Multi-Span Signal Monitoring Using Digital Coherent Receivers. - Takeshi Hoshida; Ryu Shinzaki; Motohiko Eto; Kazuyuki Tajima; Kyosuke Sone; Setsuo Yoshida; Naoya Okada; Ichiro Yokokura; Atsushi Kanai; Junichi Sugiyama; Shoichiro Oda; Hisao Nakashima (OFC, 2025)

Single-Carrier High-Capacity Transmission in Bandwidth-Limited Systems. - Guoxiu Huang; Hisao Nakashima; Takeshi Hoshida (OFC, 2025)

Low-cost and Power-efficient EEPN Mitigation Enabled by Accurate Jitter Waveform Estimation. - Jingnan Li; Xiaofei Su; Tong Ye; Ke Zhang; Hisao Nakashima; Takeshi Hoshida; Zhenning Tao (OFC, 2025)

Maximizing Throughput by Band-wise Bidirectional SCLU Transmission with Lumped Amplification. - Olga Vassilieva; Inwoong Kim; Hiroyuki Irie; Hisao Nakashima; Takeshi Hoshida; Paparao Palacharla (OFC, 2025)

An Accurate, Sensitive, and Wide-range Skew Calibration Method for Transmitter with Segmented Modulator Using Probability-maintained Multi-notch Sequence. - Tong Ye; Jingnan Li; Ke Zhang; Xiaofei Su; Shinsuke Tanaka; Yohei Sobu; Hisao Nakashima; Takeshi Hoshida; Zhenning Tao (OFC, 2025)

In-service Monitor and Pre-compensation of 100 Gbaudclass Coherent Transmitter by a 5 GHz Photodetector. - Ke Zhang; Jingnan Li; Tong Ye; Hisao Nakashima; Takeshi Hoshida; Zhenning Tao (OFC, 2025)

Probability-Maintained Notch Sequences for 64QAM. - Jingnan Li; Tong Ye; Hisao Nakashima; Takeshi Hoshida; Yasuhiko Aoki; Zhenning Tao; Yojiro Mori; Hiroshi Hasegawa (IEEE DataPort, 2025)