Koji Igarashi - RankMe

57 papers A 1B 1Journal 13Unranked 42

Year	Rank	Type	Title / Venue / Authors
2025	J	`jnl`	Joint Channel, CFO, and Data Estimation via Bayesian Inference for Multi-User MIMO-OFDM Systems. IEEE Trans. Wirel. Commun. Kenta Ito, Takumi Takahashi, Koji Ishibashi, Koji Igarashi, Shinsuke Ibi
2025	B	`conf`	Physics-Aware Decoding for Communication Channels Governed by Partial Differential Equations. ISIT Tadashi Wadayama, Koji Igarashi, Takumi Takahashi
2025	J	`jnl`	Physics-Aware Decoding for Communication Channels Governed by Partial Differential Equations. CoRR Tadashi Wadayama, Koji Igarashi, Takumi Takahashi
2025	J	`jnl`	Physics-Aware Sparse Signal Recovery Through PDE-Governed Measurement Systems. CoRR Tadashi Wadayama, Koji Igarashi, Takumi Takahashi
2025	J	`jnl`	Reduction of Fiber Four-Wave Mixing Generated from Modulated Lights by Inserting Dispersive Elements. IEICE Trans. Commun. Ayano Inoue, Koji Igarashi, Shigehiro Takasaka, Kyo Inoue
2023	—	`conf`	AoA Estimation-Aided Bayesian Receiver Design via Bilinear Inference for mmWave Massive MIMO. ICC Kenta Ito, Takumi Takahashi, Koji Igarashi, Shinsuke Ibi, Seiichi Sampei
2023	J	`jnl`	Level Allocation of Four-Level Pulse-Amplitude Modulation Signal in Optically Pre-Amplified Receiver Systems. IEICE Trans. Commun. Hiroki Kawahara, Koji Igarashi, Kyo Inoue
2023	—	`conf`	Real-time 6-Mode 19-Core Fiber Transmission. OFC Shohei Beppu, Masahiro Kikuta, Daiki Soma, Yoichi Yaegashi, Koji Igarashi, Masahiro Shigihara, Kazuhiko Aizawa, Noboru Yoshikane, Takehiro Tsuritani
2023	—	`conf`	Real-time MIMO Adaptive Equalization with Carrier-phase Recovery for Mode-division Multiplexed Optical Coherent System. OFC Koji Igarashi
2022	—	`conf`	Complex Field Measurement of Optical Frequency Combs over 100-GHz Bandwidth Using a Spectrally-Slicing-and-Synthesizing Method. OECC/PSC Yusuke Shimizu, Koji Igarashi
2022	J	`jnl`	Few-Mode Fiber Technology, Deployments, and Systems. Proc. IEEE Pierre Sillard, Kaoutar Benyahya, Daiki Soma, Guillaume Labroille, Pu Jian, Koji Igarashi, Roland Ryf, Nicolas K. Fontaine, Georg Rademacher, Kohki Shibahara
2022	—	`conf`	Soft-decision FEc Designed for Optically Preamplified PAM4 Direct Detection. OECC/PSC Koji Igarashi, Takumi Takahashi, Seiichi Sampei, Kyo Inoue
2021	J	`jnl`	Analysis of Signal Distribution in ASE-Limited Optical On-Off Keying Direct-Detection Systems. IEICE Trans. Commun. Hiroki Kawahara, Kyo Inoue, Koji Igarashi
2021	J	`jnl`	Compressed Shaping: Concept and FPGA Demonstration. CoRR Tsuyoshi Yoshida, Koji Igarashi, Magnus Karlsson, Erik Agrell
2021	—	`conf`	FPGA Implementation of Hierarchical Subcarrier Rate and Distribution Matching for up to 1.032 Tb/s or 262144-QAM. OFC Tsuyoshi Yoshida, Koji Igarashi, Yoshiaki Konishi, Magnus Karlsson, Erik Agrell
2021	—	`conf`	Mode-multiplexed 16QAM transmission over 60-km coupled four-core fibres using real-time MIMO-DSP with high-accuracy frequency offset estimation. ECOC Shohei Beppu, Masahiro Kikuta, Koji Igarashi, Hiroshi Mukai, Masahiro Shigihara, Yasuo Saito, Daiki Soma, Hidenori Takahashi, Noboru Yoshikane, Takehiro Tsuritani
2021	—	`conf`	Real-time MIMO-DSP Technologies for SDM Systems. OFC Shohei Beppu, Koji Igarashi, Masahiro Kikuta, Hiroshi Mukai, Masahiro Shigihara, Yasuo Saito, Daiki Soma, Hidenori Takahashi, Noboru Yoshikane, Itsuro Morita, Takehiro Tsuritani
2021	—	`conf`	Real-time Transoceanic Coupled 4-core Fiber Transmission. OFC Shohei Beppu, Masahiro Kikuta, Koji Igarashi, Hiroshi Mukai, Masahiro Shigihara, Yasuo Saito, Daiki Soma, Hidenori Takahashi, Noboru Yoshikane, Itsuro Morita, Masatoshi Suzuki, Takehiro Tsuritani
2020	—	`conf`	Real-Time Strongly-Coupled 4-Core Fiber Transmission. OFC Shohei Beppu, Koji Igarashi, Hiroshi Mukai, Masahiro Kikuta, Masahiro Shigihara, Daiki Soma, Takehiro Tsuritani, Itsuro Morita
2020	—	`conf`	Required and Received SNRs in Coded Modulation. ECOC Tsuyoshi Yoshida, Koji Igarashi, Masashi Binkai, Shun Chikamori, Mikael Mazur, Jochen Schröder, Keisuke Matsuda, Shota Koshikawa, Naoki Suzuki, Magnus Karlsson, Erik Agrell
2020	—	`conf`	Sparse-Dense MLC for Peak Power Constrained Channels. ECOC Tsuyoshi Yoshida, Koji Igarashi, Magnus Karlsson, Erik Agrell
2020	—	`conf`	Spectrally Slicing Coherent Optical Spectrum Analyzer for Measuring Complex Field Waveforms of Optical QAM Signals. OFC Yasuhiro Kawabata, Naoki Urakawa, K. Kinoshita, Koji Igarashi
2020	—	`conf`	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. ECOC Hayato Kiwata, Masahiro Kikuta, Masahiro Shigihara, Koji Igarashi
2019	J	`jnl`	Bit-Error-Rate Degradation Due to Inter-Channel Crosstalk of Different Signal Format. IEICE Trans. Commun. Naruki Shinohara, Koji Igarashi, Kyo Inoue
2019	—	`conf`	Constellation Monitor of QPSK Optical Signals Based on Spectrally-sliced Coherent Optical Spectrum Analyzers. OECC/PSC Koji Igarashi, Naoki Urakawa
2019	J	`jnl`	EXIT Chart-Aided Design of LDPC Codes for Self-Coherent Detection with Turbo Equalizer for Optical Fiber Short-Reach Transmissions. IEICE Trans. Commun. Noboru Osawa, Shinsuke Ibi, Koji Igarashi, Seiichi Sampei
2019	J	`jnl`	Generation Efficiency of Fiber Four-Wave Mixing for Phase-Shift Keying Signal Light. IEICE Trans. Commun. Kyo Inoue, Koji Igarashi
2019	—	`conf`	Mode-Dependent Probabilistic Shaping for Highly-Efficient Weakly Coupled 10-Mode Fiber Transmission. OFC Shohei Beppu, Daiki Soma, Yuta Wakayama, Seiya Sumita, Koji Igarashi, Hidenori Takahashi, Takehiro Tsuritani
2019	—	`conf`	Numerical Evaluation of Modal Crosstalk Statistics in Multiple Connectors of Weakly-coupled 10-mode Fibers. OECC/PSC Gen Kawabata, Koji Igarashi
2019	—	`conf`	Real-Time DSP for Adaptive FIR Filters Based on LMS Algorithm. OECC/PSC Masahiro Kikuta, Shohei Beppu, Tomoyuki Nagai, Yasuo Saito, Takehiro Tsuritani, Koji Igarashi
2019	J	`jnl`	Reduction of Crosstalk Influence in a 7-Core Multicore Fiber by Frequency Interleave. IEICE Trans. Commun. Shun Orii, Kyo Inoue, Koji Igarashi
2019	J	`jnl`	Simplified Iterative Decoder for Polybinary-Shaped Optical Signals in Super-Nyquist Wavelength Division Multiplexed Systems. IEICE Trans. Commun. Shuai Yuan, Koji Igarashi
2018	—	`conf`	266.1-Tbit/s Repeatered Transmission over 90.4-km 6-Mode Fiber Using Dual C+L-Band 6-Mode EDFA. OFC Yuta Wakayama, Daiki Soma, Shohei Beppu, Seiya Sumita, Koji Igarashi, Takehiro Tsuritani
2018	—	`conf`	An Iterative Soft Interference Cancellation for Pilot-Assisted Optical-OFDM with LDPC Code Optimized by EXIT Chart. OFC Noboru Osawa, Shinsuke Ibi, Koji Igarashi, Seiichi Sampei
2018	—	`conf`	Low-loss and Low-crosstalk All-fiber-based Six-mode Multiplexer and Demultiplexer for Mode-Multiplexed QAM Signals in C-band. OFC Koji Igarashi, Yuta Wakayama, Daiki Soma, Takehiro Tsuritani, Itsuro Morita, Kyung Jun Park, Jaekwon Ko, Byoung Yoon Kim
2017	—	`conf`	10.16 Peta-bit/s Dense SDM/WDM transmission over Low-DMD 6-Mode 19-Core Fibre Across C+L Band. ECOC Daiki Soma, Yuta Wakayama, Shohei Beppu, Seiya Sumita, Takehiro Tsuritani, Tetsuya Hayashi, Takuji Nagashima, Masato Suzuki, Hidenori Takahashi, Koji Igarashi, Itsuro Morita, Masatoshi Suzuki
2017	—	`conf`	257-Tbit/s Partial MIMO-based 10-Mode C+L-band WDM Transmission over 48-km FMF. ECOC Daiki Soma, Shohei Beppu, Yuta Wakayama, Yu Kawaguchi, Koji Igarashi, Takehiro Tsuritani
2017	—	`conf`	Dual C+L-Band Six-Mode Optical Amplifier with Widely Erbium-Doped Fibre. ECOC Yuta Wakayama, Daiki Soma, Koji Igarashi, Hidenori Taga, Takehiro Tsuritani
2017	—	`conf`	Partial MIMO-based 10-mode-multiplexed transmission over 81km weakly-coupled few-mode fiber. OFC Daiki Soma, Yuta Wakayama, Koji Igarashi, Takehiro Tsuritani
2016	—	`conf`	6-Mode 19-core fiber for weakly-coupled mode-multiplexed transmission over uncoupled cores. OFC Tetsuya Hayashi, Takuji Nagashima, Kazuhiro Yonezawa, Yuta Wakayama, Daiki Soma, Koji Igarashi, Takehiro Tsuritani, Takashi Sasaki
2016	A	`conf`	A new VSJ mechanism for multi-directional passivity and quick response. IROS Shinya Kajikawa, Takuya Akasaka, Koji Igarashi
2016	—	`conf`	All-fiber-based selective mode multiplexer and demultiplexer for six-mode multiplexed signals. OFC Koji Igarashi, Kyung Jun Park, Daiki Soma, Yuta Wakayama, Takehiro Tsuritani, Byoung Yoon Kim
2016	—	`conf`	Intermediate mode interchange for reduction of differential mode-group delay in weakly-coupled 6-mode fiber transmission line. OFC Yuta Wakayama, Daiki Soma, Koji Igarashi, Hidenori Taga, Takehiro Tsuritani
2016	—	`conf`	Ultra-dense space division multiplexing technologies towards multi-Peta bit/s optical transmission. ICTON Masatoshi Suzuki, Daiki Soma, Koji Igarashi, Yuta Wakayama, Koki Takeshima, Yu Kawaguchi, Noboru Yoshikane, Takehiro Tsuritani, Itsuro Morita
2015	—	`conf`	114 space-division-multiplexed transmission over 9.8-km weakly-coupled-6-mode uncoupled-19-core fibers. OFC Koji Igarashi, Daiki Soma, Yuta Wakayama, Koki Takeshima, Yu Kawaguchi, Takehiro Tsuritani, Itsuro Morita, Masatoshi Suzuki
2015	—	`conf`	2.05 Peta-bit/s super-nyquist-WDM SDM transmission using 9.8-km 6-mode 19-core fiber in full C band. ECOC Daiki Soma, Koji Igarashi, Yuta Wakayama, Koki Takeshima, Yu Kawaguchi, Noboru Yoshikane, Takehiro Tsuritani, Itsuro Morita, Masatoshi Suzuki
2015	—	`conf`	51.1-Tbit/s MCF transmission over 2, 520 km using cladding pumped 7-core EDFAs. OFC Koki Takeshima, Takehiro Tsuritani, Yukihiro Tsuchida, Koichi Maeda, Tsunetoshi Saito, Kengo Watanabe, Toru Sasa, Katsunori Imamura, Ryuichi Sugizaki, Koji Igarashi, Itsuro Morita, Masatoshi Suzuki
2015	—	`conf`	DMD measurement of 114-SDM transmission fibre using low-coherence interferometry with digital holographic processing. ECOC Yuta Wakayama, Hidenori Taga, Koji Igarashi, Takehiro Tsuritani
2015	—	`conf`	Experimental study on polybinary-pulse-shaped QAM signals for highly-spectral-efficient Super-Nyquist-WDM systems. ECOC Koji Igarashi, Takehiro Tsuritani, Itsuro Morita
2014	—	`conf`	1-Exabit/s×km super-Nyquist-WDM multi-core-fiber transmission. ECOC Koji Igarashi, Takehiro Tsuntani, Itsuro Morita
2014	—	`conf`	Bit-error rate performance of super-Nyquist-WDM DP-QPSK signals with duobinary-pulse shaping. OFC Koji Igarashi, Takehiro Tsuritani, Itsuro Morita
2014	—	`conf`	Degenerate modes multiplexer/demultiplexer using Mach-Zehnder interferometer with image inversion. ECOC Daiki Soma, Koki Takeshima, Koji Igarashi, Takehiro Tsuritani
2014	—	`conf`	Long-haul transmission using multicore fibers. OFC Hidenori Takahashi, Koji Igarashi, Takehiro Tsuritani
2014	—	`conf`	Selective mode conversion using phase plates for 10-mode fiber. ECOC Koji Igarashi, Daiki Soma, Takehiro Tsuritani
2013	—	`conf`	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. OFC/NFOEC Noboru Yoshikane, Koji Igarashi, Takehiro Tsuritani
2013	—	`conf`	Frequency stabilization of multiple semiconductor lasers for Nyquist-WDM transmission systems. OFC/NFOEC Koji Igarashi, Takehiro Tsuritani, Itsuro Morita, Kazuhiro Katoh, Kazuro Kikuchi
2013	—	`conf`	Influence of channel misalignment of time-interleaved DAC on sensitivity degradation in coherent optical receivers. OFC/NFOEC Changyo Han, Koji Igarashi, Kazuro Kikuchi