Koji Igarashi

Orcid: 0000-0002-0806-7133

According to our database1, Koji Igarashi authored at least 52 papers between 2013 and 2023.

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Bibliography

2023
Level Allocation of Four-Level Pulse-Amplitude Modulation Signal in Optically Pre-Amplified Receiver Systems.
IEICE Trans. Commun., August, 2023

Real-time MIMO Adaptive Equalization with Carrier-phase Recovery for Mode-division Multiplexed Optical Coherent System.
Proceedings of the Optical Fiber Communications Conference and Exhibition, 2023

Real-time 6-Mode 19-Core Fiber Transmission.
Proceedings of the Optical Fiber Communications Conference and Exhibition, 2023

AoA Estimation-Aided Bayesian Receiver Design via Bilinear Inference for mmWave Massive MIMO.
Proceedings of the IEEE International Conference on Communications, 2023

2022
Few-Mode Fiber Technology, Deployments, and Systems.
Proc. IEEE, 2022

Complex Field Measurement of Optical Frequency Combs over 100-GHz Bandwidth Using a Spectrally-Slicing-and-Synthesizing Method.
Proceedings of the 2022 27th OptoElectronics and Communications Conference (OECC) and 2022 International Conference on Photonics in Switching and Computing (PSC), 2022

Soft-decision FEc Designed for Optically Preamplified PAM4 Direct Detection.
Proceedings of the 2022 27th OptoElectronics and Communications Conference (OECC) and 2022 International Conference on Photonics in Switching and Computing (PSC), 2022

2021
Analysis of Signal Distribution in ASE-Limited Optical On-Off Keying Direct-Detection Systems.
IEICE Trans. Commun., 2021

Compressed Shaping: Concept and FPGA Demonstration.
CoRR, 2021

FPGA Implementation of Hierarchical Subcarrier Rate and Distribution Matching for up to 1.032 Tb/s or 262144-QAM.
Proceedings of the Optical Fiber Communications Conference and Exhibition, 2021

Real-time Transoceanic Coupled 4-core Fiber Transmission.
Proceedings of the Optical Fiber Communications Conference and Exhibition, 2021

Real-time MIMO-DSP Technologies for SDM Systems.
Proceedings of the Optical Fiber Communications Conference and Exhibition, 2021

Mode-multiplexed 16QAM transmission over 60-km coupled four-core fibres using real-time MIMO-DSP with high-accuracy frequency offset estimation.
Proceedings of the European Conference on Optical Communication, 2021

2020
Spectrally Slicing Coherent Optical Spectrum Analyzer for Measuring Complex Field Waveforms of Optical QAM Signals.
Proceedings of the Optical Fiber Communications Conference and Exhibition, 2020

Real-Time Strongly-Coupled 4-Core Fiber Transmission.
Proceedings of the Optical Fiber Communications Conference and Exhibition, 2020

Required and Received SNRs in Coded Modulation.
Proceedings of the European Conference on Optical Communications, 2020

Sparse-Dense MLC for Peak Power Constrained Channels.
Proceedings of the European Conference on Optical Communications, 2020

Ultra-long-time (0.8 s) characterization of laser phase noise with high temporal resolution (800 ps) based on heterodyne reception with FPGA data acquisition.
Proceedings of the European Conference on Optical Communications, 2020

2019
Simplified Iterative Decoder for Polybinary-Shaped Optical Signals in Super-Nyquist Wavelength Division Multiplexed Systems.
IEICE Trans. Commun., 2019

Bit-Error-Rate Degradation Due to Inter-Channel Crosstalk of Different Signal Format.
IEICE Trans. Commun., 2019

EXIT Chart-Aided Design of LDPC Codes for Self-Coherent Detection with Turbo Equalizer for Optical Fiber Short-Reach Transmissions.
IEICE Trans. Commun., 2019

Reduction of Crosstalk Influence in a 7-Core Multicore Fiber by Frequency Interleave.
IEICE Trans. Commun., 2019

Generation Efficiency of Fiber Four-Wave Mixing for Phase-Shift Keying Signal Light.
IEICE Trans. Commun., 2019

Real-Time DSP for Adaptive FIR Filters Based on LMS Algorithm.
Proceedings of the 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC), 2019

Numerical Evaluation of Modal Crosstalk Statistics in Multiple Connectors of Weakly-coupled 10-mode Fibers.
Proceedings of the 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC), 2019

Constellation Monitor of QPSK Optical Signals Based on Spectrally-sliced Coherent Optical Spectrum Analyzers.
Proceedings of the 2019 24th OptoElectronics and Communications Conference (OECC) and 2019 International Conference on Photonics in Switching and Computing (PSC), 2019

Mode-Dependent Probabilistic Shaping for Highly-Efficient Weakly Coupled 10-Mode Fiber Transmission.
Proceedings of the Optical Fiber Communications Conference and Exhibition, 2019

2018
266.1-Tbit/s Repeatered Transmission over 90.4-km 6-Mode Fiber Using Dual C+L-Band 6-Mode EDFA.
Proceedings of the Optical Fiber Communications Conference and Exposition, 2018

An Iterative Soft Interference Cancellation for Pilot-Assisted Optical-OFDM with LDPC Code Optimized by EXIT Chart.
Proceedings of the Optical Fiber Communications Conference and Exposition, 2018

Low-loss and Low-crosstalk All-fiber-based Six-mode Multiplexer and Demultiplexer for Mode-Multiplexed QAM Signals in C-band.
Proceedings of the Optical Fiber Communications Conference and Exposition, 2018

2017
Partial MIMO-based 10-mode-multiplexed transmission over 81km weakly-coupled few-mode fiber.
Proceedings of the Optical Fiber Communications Conference and Exhibition, 2017

Dual C+L-Band Six-Mode Optical Amplifier with Widely Erbium-Doped Fibre.
Proceedings of the European Conference on Optical Communication, 2017

10.16 Peta-bit/s Dense SDM/WDM transmission over Low-DMD 6-Mode 19-Core Fibre Across C+L Band.
Proceedings of the European Conference on Optical Communication, 2017

257-Tbit/s Partial MIMO-based 10-Mode C+L-band WDM Transmission over 48-km FMF.
Proceedings of the European Conference on Optical Communication, 2017

2016
Intermediate mode interchange for reduction of differential mode-group delay in weakly-coupled 6-mode fiber transmission line.
Proceedings of the Optical Fiber Communications Conference and Exhibition, 2016

All-fiber-based selective mode multiplexer and demultiplexer for six-mode multiplexed signals.
Proceedings of the Optical Fiber Communications Conference and Exhibition, 2016

6-Mode 19-core fiber for weakly-coupled mode-multiplexed transmission over uncoupled cores.
Proceedings of the Optical Fiber Communications Conference and Exhibition, 2016

A new VSJ mechanism for multi-directional passivity and quick response.
Proceedings of the 2016 IEEE/RSJ International Conference on Intelligent Robots and Systems, 2016

Ultra-dense space division multiplexing technologies towards multi-Peta bit/s optical transmission.
Proceedings of the 18th International Conference on Transparent Optical Networks, 2016

2015
51.1-Tbit/s MCF transmission over 2, 520 km using cladding pumped 7-core EDFAs.
Proceedings of the Optical Fiber Communications Conference and Exhibition, 2015

114 space-division-multiplexed transmission over 9.8-km weakly-coupled-6-mode uncoupled-19-core fibers.
Proceedings of the Optical Fiber Communications Conference and Exhibition, 2015

DMD measurement of 114-SDM transmission fibre using low-coherence interferometry with digital holographic processing.
Proceedings of the European Conference on Optical Communication, 2015

2.05 Peta-bit/s super-nyquist-WDM SDM transmission using 9.8-km 6-mode 19-core fiber in full C band.
Proceedings of the European Conference on Optical Communication, 2015

Experimental study on polybinary-pulse-shaped QAM signals for highly-spectral-efficient Super-Nyquist-WDM systems.
Proceedings of the European Conference on Optical Communication, 2015

2014
Long-haul transmission using multicore fibers.
Proceedings of the Optical Fiber Communications Conference and Exhibition, 2014

Bit-error rate performance of super-Nyquist-WDM DP-QPSK signals with duobinary-pulse shaping.
Proceedings of the Optical Fiber Communications Conference and Exhibition, 2014

Degenerate modes multiplexer/demultiplexer using Mach-Zehnder interferometer with image inversion.
Proceedings of the European Conference on Optical Communication, 2014

1-Exabit/s×km super-Nyquist-WDM multi-core-fiber transmission.
Proceedings of the European Conference on Optical Communication, 2014

Selective mode conversion using phase plates for 10-mode fiber.
Proceedings of the European Conference on Optical Communication, 2014

2013
Comparison of network cost and power consumption between a single-line-rate network and a flexible-bitrate network in the beyond-100-Gb/s networks era.
Proceedings of the 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC), 2013

Frequency stabilization of multiple semiconductor lasers for Nyquist-WDM transmission systems.
Proceedings of the 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC), 2013

Influence of channel misalignment of time-interleaved DAC on sensitivity degradation in coherent optical receivers.
Proceedings of the 2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC), 2013


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