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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 80  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
OCS, CS
(Joint)
2024-01-12
14:25
Kagoshima   Polar code for reducing decoder complexity of soft-decision forward error correction
Zhiyuan Song, Koji Igarashi (Osaka Univ.), Yohei Koganei (Fujitsu) OCS2023-65
For managing both to reduce the complexity of soft-decision forward error correction (FEC) and to attain fine tunability... [more] OCS2023-65
pp.43-48
OCS, OFT, IEE-CMN, ITE-BCT
(Joint) [detail]
2023-11-09
16:20
Kyoto
(Primary: On-site, Secondary: Online)
Suppressing Instability of Adaptive Equalization Due to Mode-dependent Loss in Mode-division-multiplexed Transmission Systems
Koji Igarashi (Osaka Univ.) OCS2023-43
 [more] OCS2023-43
pp.1-5
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
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