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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| OCS, OFT, IEE-CMN, ITE-BCT (Joint) [detail] |
2023-11-09 16:20 |
Kyoto | (Primary: On-site, Secondary: Online) |
Unstability of MIMO adaptive equalization due to mode dependent loss in mode-division multiplexed system Koji Igarashi (Osaka Univ.) |
[more] | |
| OFT, OCS, LSJ (Joint) [detail] |
2023-08-25 11:20 |
Hokkaido | (Primary: On-site, Secondary: Online) |
Real-time 114-SDM transmission over a 6-mode 19-core fiber using real-time MIMO DSP Shohei Beppu (KDDI Research), Masahiro Kikuta, Masahiro Shigihara (NEC Platforms), Koji Igarashi (Osaka University), Daiki Soma, Yuta Wakayama, Noboru Yoshikane (KDDI Research)  OCS2023-25 |
Space-division multiplexing (SDM) transmission systems, in which multiple channels with different spatial paths are mult... [more] | OCS2023-25 pp.33-38 |
| SeMI, RCS, RCC, NS, SR (Joint) |
2023-07-13 13:50 |
Osaka | Osaka University Nakanoshima Center + Online (Primary: On-site, Secondary: Online) |
A Study on Bayesian Receiver Design for Uplink MU-MIMO Systems with Carrier Frequency Offsets Kenta Ito, Takumi Takahashi, Koji Igarashi (Osaka Univ.), Koji Ishibashi (UEC), Shinsuke Ibi (Doshisha Univ.) RCS2023-93 |
This paper proposes a novel Bayesian receiver design to realize high-accuracy data detection under observations subject ... [more] | RCS2023-93 pp.70-75 |
| PN, NS, OCS (Joint) |
2023-06-09 09:50 |
Kagawa | (Primary: On-site, Secondary: Online) |
Characterization of Multistage Decoder with Channel Polarization to Reduce Computational Complexity of Soft-decision Forward Error Correction Zhiyuan song, Koji Igarashi (Osaka Univ.) OCS2023-17 |
[more] | OCS2023-17 pp.51-56 |
| OCS, OFT, OPE (Joint) [detail] |
2023-02-17 11:05 |
Okinawa | kukuru-itomancity (Primary: On-site, Secondary: Online) |
Designing Operation Parameters Using Deep Unfolding for MIMO Adaptive Equalization in Optical Coherent Transmission Systems Eidai Sunamoto, Koji Igarashi (Osaka Univ.) OCS2022-81 OPE2022-110 |
In the coherent optical transmission systems, adaptive control is required to suppress and compensate for laser phase no... [more] | OCS2022-81 OPE2022-110 pp.56-61(OCS), pp.81-86(OPE) |
| OCS, OFT, OPE (Joint) [detail] |
2023-02-17 11:30 |
Okinawa | kukuru-itomancity (Primary: On-site, Secondary: Online) |
Performance Degradation of MIMO Adaptive Equalization due to Mode-to-Mode Gain Deviation in Mode-division Multiplexed Optical Amplifiers Koji Igarashi (Osaka Univ.) OCS2022-82 OPE2022-111 |
[more] | OCS2022-82 OPE2022-111 pp.62-67(OCS), pp.87-92(OPE) |
| OCS, OFT, OPE (Joint) [detail] |
2023-02-17 14:35 |
Okinawa | kukuru-itomancity (Primary: On-site, Secondary: Online) |
Nonlinear wave equation for wavelength/polarization multiplexed signals in fiber transmission Kyo Inoue, Koji Igarashi (Osaka Univ.) OCS2022-87 OPE2022-116 |
Nonlinear fiber transmission has been usually described by the nonlinear Schrödinger or the Manakov equation. However, t... [more] | OCS2022-87 OPE2022-116 pp.86-90(OCS), pp.111-115(OPE) |
| ITE-BCT, OCS, IEE-CMN, OFT | 2022-11-11 14:15 |
Miyagi | Forest-Sendai (Primary: On-site, Secondary: Online) |
Time-resolve constellation monitoring of quadrature amplitude modulation optical signals with time-and-frequency slicing-and-synthesizing method Tsubasa Fujiwara, Koji Igarashi (Osaka Univ), Fumihiko Ito (Shimane Univ) OCS2022-47 |
In coherent transmission systems, we require simple constellation monitoring of quadrature amplitude modulation (QAM) op... [more] | OCS2022-47 pp.41-45 |
| OPE, OCS, LQE | 2022-10-21 12:55 |
Ehime | (Primary: On-site, Secondary: Online) |
Laser frequency noise measurement using FPGA data acquisition with ultra-long period and high temporal resolution Koji Igarashi (Osaka Univ.) OCS2022-33 OPE2022-79 LQE2022-42 |
[more] | OCS2022-33 OPE2022-79 LQE2022-42 pp.86-89 |
| OCS, PN, NS (Joint) |
2022-06-10 13:00 |
Online | Online | Spectrally-Slicing-and-Synthesizing Measurement for Complex Field Waveforms of 100-GHz Optical Frequency Combs Yusuke Shimizu, Tsubasa Fujiwara, Koji Igarashi (Osaka Univ.) OCS2022-10 |
[more] | OCS2022-10 pp.1-5 |
| RCS | 2022-04-22 11:20 |
Osaka | Osaka University, and online (Primary: On-site, Secondary: Online) |
A Study on Parametric Bilinear Inference via Gaussian Belief Propagation Kenta Ito, Takumi Takahashi, Koji Igarashi (Osaka Univ.), Shinsuke Ibi (Doshisha Univ.), Seiichi Sampei (Osaka Univ.) RCS2022-8 |
Parametric bilinear inference estimates two unknown varables (i.e., parameters) with a symmetric linear regression struc... [more] | RCS2022-8 pp.35-40 |
| OPE, OFT, OCS (Joint) [detail] |
2022-02-25 13:30 |
Online | Online | Measuring Jones matrices representing mode couplings in few mode fibers Ryotaro Fukunaga, Koji Igarashi (Osaka Univ.) OCS2021-50 OPE2021-65 |
The mode dispersion in few-mode fibers (FMFs) determines the transmission performance of the mode multiplexed systems. I... [more] | OCS2021-50 OPE2021-65 pp.46-50(OCS), pp.84-88(OPE) |
| PN, MWP, EMT, PEM, IEE-EMT [detail] | 2022-01-28 09:25 |
Online | Online | Control of SDN optical networks using public cloud container services Hayato Kiwata, Koji Igarashi (Osaka Univ), Noboru Yoshikane (KDDI Research) PN2021-41 EMT2021-57 MWP2021-46 |
In this work, we propose a method for controlling SDN optical network using container virtualization in public cloud ser... [more] | PN2021-41 EMT2021-57 MWP2021-46 pp.46-50 |
| RCS, SIP, IT | 2022-01-20 17:20 |
Online | Online | A Study on AoA Estimation-Aided Bayesian Receiver Design via Bilinear Inference for mmWave Large MIMO Kenta Ito, Takumi Takahashi, Koji Igarashi (Osaka Univ.), Shinsuke Ibi (Doshisha Univ.), Seiichi Sampei (Osaka Univ.) IT2021-58 SIP2021-66 RCS2021-226 |
We propose a novel joint channel and data estimation (JCDE) scheme for mmWave large multi-user multi-input multi-output ... [more] | IT2021-58 SIP2021-66 RCS2021-226 pp.167-172 |
| OFT, OCS, IEE-CMN, ITE-BCT [detail] | 2021-11-19 10:00 |
Online | Online | Relationship between Polarization Mode Dispersion and Impulse Response Spread in Dual-polarization/Mode-multiplexed Coherent Transmission Systems Eidai Sunamoto, Ryotaro Fukunaga, Koji Igarashi (Osaka Univ.) OFT2021-51 |
In coherent optical fiber transmission systems with dual-polarization multiplexing and/or mode multiplexing, efficient d... [more] | OFT2021-51 pp.1-6 |
| OFT, OCS, IEE-CMN, ITE-BCT [detail] | 2021-11-19 13:00 |
Online | Online | Application of Soft-Decision FEC to Pre-Amplified Direct Detection with Four-Level Pulse Amplitude Modulation Koji Igarashi, Takumi Takahashi (Osaka Univ.) OCS2021-30 |
(Advance abstract in Japanese is available) [more] | OCS2021-30 pp.9-14 |
| OFT, OCS, IEE-CMN, ITE-BCT [detail] | 2021-11-19 13:25 |
Online | Online | Four-mode multiplexed real-time 16QAM transmission using high-accuracy frequency offset estimation algorithm Shohei Beppu (KDDI Research, Inc.), Masahiro Kikuta (NEC Platforms, Ltd.), Koji Igarashi (Osaka University), Hiroshi Mukai, Masahiro Shigihara (NEC Platforms, Ltd.), Daiki Soma, Hidenori Takahashi, Noboru Yoshikane, Takehiro Tsuritani (KDDI Research, Inc.) OCS2021-31 |
Mode-division-multiplexed (MDM) transmission systems with multiple-input multiple-output digital signal processing (MIMO... [more] | OCS2021-31 pp.15-20 |
| OFT, ITE-BCT, OCS, IEE-CMN [detail] | 2020-11-12 14:35 |
Online | Online | Modeling of couplings between two degenerate linearly-polarized modes based on dual three-dimensional Stokes Space Ryotaro Fukunaga, Koji Igarashi (Osaka Univ.) OFT2020-39 |
In mode-division-multiplexed transmission in multi-mode fibers (MMFs), it is essential to compensate for couplings betwe... [more] | OFT2020-39 pp.11-16 |
| OPE, OCS, LQE | 2020-10-23 11:10 |
Online | Online | Real-time strongly-coupled 4-core fiber transmission Shohei Beppu (KDDI Research, Inc.), Koji Igarashi (Osaka University), Hiroshi Mukai, Masahiro Kikuta, Masahiro Shigihara (NEC Platforms, Ltd.), Daiki Soma, Hidenori Takahashi, Noboru Yoshikane, Takehiro Tsuritani (KDDI Research, Inc.) OCS2020-12 OPE2020-35 LQE2020-15 |
[more] | OCS2020-12 OPE2020-35 LQE2020-15 pp.21-25 |
| CS, OCS (Joint) |
2020-01-16 11:40 |
Oita | Beppu Housensou Hotel (Oita Pref.) | Performance evaluation of spectrally slicing and synthesizing method for measuring complex field waveforms of optical QAM signals Yasuhiro Kawabata, Koji Igarashi (Osaka Univ.) OCS2019-69 |
Measuring complex amplitude of optical signals is one of essential techniques in optical coherent quadrature amplitude m... [more] | OCS2019-69 pp.25-30 |
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