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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 70  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
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
OCS, ITE-BCT, OFT, IEE-CMN [detail] 2019-11-21
15:30
Yamaguchi Kaikyo-Messe-Shimonoseki Performance evaluation of MIMO adaptive equalization with update delay in optical coherent reception
Koji Igarashi (Osaka Univ.) OCS2019-60
(Advance abstract in Japanese is available) [more] OCS2019-60
pp.19-23
OCS, LQE, OPE 2019-10-18
09:55
Kagoshima   Degradation of Achievable Information Rate due to Phase Noise in Optical Coherent Systems
Song Zhiyuan, Koji Igarashi (Osaka Univ.) OCS2019-41 OPE2019-79 LQE2019-57
Achievable information rate (AIR) is perfect tool to evaluate the number of the reliably-transmitted information bits pe... [more] OCS2019-41 OPE2019-79 LQE2019-57
pp.73-76
OFT, OCS, LSJ
(Joint) [detail]
2019-08-29
16:10
Hokkaido   Real-time MIMO optical receivers for weakly-coupled ten-mode-multiplexed systems
Koji Igarashi (Osaka Univ), Shohei Beppu (KDDI Research), Masahiro Kikuta (NECPF), Tomoyuki Nagai (Osaka Univ), Yasuo Saito (NECPF), Daiki Soma, Takehiro Tsuritani (KDDI Research) OCS2019-23
(Advance abstract in Japanese is available) [more] OCS2019-23
pp.17-22
OCS, PN, NS
(Joint)
2019-06-20
11:25
Iwate MALIOS(Morioka) Statistical characteristics of modal coupling at multiple connections of weakly coupled 10 mode fibers
Gen Kawabata, Koji Igarashi (Osaka Univ.) OCS2019-12
(Advance abstract in Japanese is available) [more] OCS2019-12
pp.11-15
ITE-BCT, OCS, OFT, IEE-CMN [detail] 2018-11-08
11:30
Okayama Kurashiki-City-Geibunnkan Statistical Model for Nonlinear Fiber Propagation and Its Application to Nonlinear Compensation for DP-16QAM Optical Signals
Shuai Yuan, Koji Igarashi (Osaka Univ.) OCS2018-53
In this paper, we investigate the statistical characteristics of nonlinear fiber transmission. With the statistical mode... [more] OCS2018-53
pp.7-12
ITE-BCT, OCS, OFT, IEE-CMN [detail] 2018-11-09
15:20
Okayama Kurashiki-City-Geibunnkan Data-Associated Channel Compensation and Carrier Phase Recovery Based on Large-System Limit for PDM System
Seiji Tanaka, Noboru Osawa, Shinsuke Ibi, Koji Igarashi, Seiichi Sampei (Osaka Univ.) OCS2018-57
In PDM systems, polarization demultiplexing and carrier phase recovery (CPR) are required for signal detection.
%
This... [more]
OCS2018-57
pp.69-74
OPE, LQE, OCS 2018-10-19
13:05
Saga   Optimization of signal amplitudes for dynamic range of analog-to-digital convertor in digital coherent reception of ultra-high QAM optical signals
Yasuhiro Kawabata, Koji Igarashi (Osaka Univ.) OCS2018-45 OPE2018-81 LQE2018-70
In the digital coherent reception of ultra-high quadrature amplitude modulation (QAM) optical signals, the received ampl... [more] OCS2018-45 OPE2018-81 LQE2018-70
pp.93-97
OPE, LQE, OCS 2018-10-19
13:30
Saga   Performance evaluation of spectrally-synthesized coherent reception for constellation monitoring of pseudo random quadrature phase shift keying optical signals
Naoki Urakawa, Koji Igarashi (Osaka Univ.) OCS2018-46 OPE2018-82 LQE2018-71
In our proposed spectrally-synthesized coherent reception for measuring constellation maps of periodical optical signals... [more] OCS2018-46 OPE2018-82 LQE2018-71
pp.99-104
OCS, OFT, LSJ
(Joint) [detail]
2018-08-30
14:05
Hokkaido Hakodate Hokuyo Building 8Kai Hall Optimization of core diameter for suppression of modal coupling in few-mode fiber connection
Gen Kawabata, Koji Igarashi (Osaka Univ.) OCS2018-21
The modal couplings can be caused by the misalignment errors in few-mode fiber (FMF) connection. It is one of the most c... [more] OCS2018-21
pp.11-14
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