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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 18 of 18  /   
Committee Date Time Place Paper Title / Authors Abstract Paper #
LQE, OPE, OCS 2023-11-24
Online Online [Special Invited Talk] Demonstration of 4-core Dual-polarization Optical Hybrid Using Dielectric Metasurface
Kento Komtsu, Go Soma (Univ. of Tokyo), Shota Ishimura, Hidenori Takahashi, Takehiro Tsuritani, Masatoshi Suzuki (KDDI Research), Yoshiaki Nakano, Takuo Tanemura (Univ. of Tokyo) OCS2023-55 OPE2023-105 LQE2023-52
This technical report reviews the presentation of the ECOC2023 postdeadline paper Th.C.1.3. Spatially scalable metasurfa... [more] OCS2023-55 OPE2023-105 LQE2023-52
PN 2023-11-16
(Primary: On-site, Secondary: Online)
[Invited Talk] Free-space optical communications using photonic-crystal surface-emitting lasers
Shota Ishimura (KDDI Research.), Ryohei Morita, Takuya Inoue (Kyoto Univ.), Kosuke Nishimura, Hidenori Takahashi, Takehiro Tsuritani (KDDI Research.), Menaka De Zoysa, Kenji Ishizaki (Kyoto Univ.), Masatoshi Suzuki (KDDI Research.), Susumu Noda (Kyoto Univ.) PN2023-41
Recently, the application of optical communication in space has been actively discussed. Compared to microwaves or milli... [more] PN2023-41
MWPTHz, PN, EMT, IEE-EMT [detail] 2023-01-23
(Primary: On-site, Secondary: Online)
[Invited Talk] Analog Radio-over-Fiber Systems for 5G and Beyond 5G Mobile Communication Systems
Kazuki Tanaka, Shinji Nimura, Shota Ishimura, Kosuke Nishimura, Ryo Inohara (KDDI Research) PN2022-34 EMT2022-72 MWPTHz2022-60
Millimeter and sub-terahertz waves will be used for high-speed wireless communication in the mature phase of fifth gener... [more] PN2022-34 EMT2022-72 MWPTHz2022-60
OPE, LQE, OCS 2022-11-18
Online Online [Special Invited Talk] Proposal and Demonstration of Free-Space Optical Communication Using Lens-Free Photonic-Crystal Surface-Emitting Laser
Shota Ishimura (KDDI Research), Ryohei Morita, Takuya Inoue (Kyoto Univ.), Kosuke Nishimura, Hidenori Takahashi, Takehiro Tsuritani (KDDI Research), Menaka De Zoysa, Kenji Ishizaki (Kyoto Univ.), Masatoshi Suzuki (KDDI Research), Susumu Noda (Kyoto Univ.) OCS2022-57 OPE2022-92 LQE2022-55
In this talk, we present the first demonstration of free-space optical (FSO) communication using a photonic-crystal surf... [more] OCS2022-57 OPE2022-92 LQE2022-55
OFT 2022-10-14
Kanagawa Kanagawa-Kenmin Center
(Primary: On-site, Secondary: Online)
Analog IFoF Mobile Fronthaul based on SDM/WDM/SCM Accommodating 576 channel (1.314 Tbit/s) Wireless Signals
Shinji Nimura, Kazuki Tanaka, Shota Ishimura, Kosuke Nishimura, Ryo Inohara, Takehiro Tsuritani, Masatoshi Suzuki (KDDI Research) OFT2022-36
We have demonstrated an analog IFoF-based mobile fronthaul with SCM, WDM, and SDM for the realization of cell-free massi... [more] OFT2022-36
MWPTHz, EST, MW, EMT, OPE, IEE-EMT [detail] 2022-07-19
Hokkaido Asahikawa Civic Culture Hall
(Primary: On-site, Secondary: Online)
Photodiode-Integrated 8×8 Array-Antenna Module for Analog-RoF Supporting 40-GHz 5G Systems
Shinji Nimura, Shota Ishimura, Kazuki Tanaka, Kosuke Nishimura, Ryo Inohara (KDDI Research) EMT2022-31 MW2022-55 OPE2022-34 EST2022-32 MWPTHz2022-29
An 8×8 40-GHz beamforming antenna module integrated with PD and RF circuits was developed and demonstrated with the comb... [more] EMT2022-31 MW2022-55 OPE2022-34 EST2022-32 MWPTHz2022-29
(Joint) [detail]
Online Online Photonic generation of wideband electrical PM signal using the Armstrong method
Shota Ishimura, Hsuan-Yun Kao, Kazuki Tanaka, Kosuke Nishimura, Ryo Inohara, Takehiro Tsuritani, Masatoshi Suzuki (KDDI Research, Inc.) OCS2020-43 OPE2020-80
Recently, there have been several reports on analog-based mobile front haul systems. We have also demonstrated high-fide... [more] OCS2020-43 OPE2020-80
pp.1-5(OCS), pp.21-25(OPE)
EMT, MWP, PN, IEE-EMT [detail] 2021-01-21
Online Online Demonstration of 5G Mobile Network System based on hybrid IFoF and RoF/RoMMF links
Hsuan-Yun Kao (KDDI Research), Hiroki Yasuda (Yazaki), Shota Ishimura, Kazuki Tanaka (KDDI Research), Takamitsu Aiba, Tomohiro Wakabayashi (Yazaki), Kosuke Nishimura (KDDI Research), Tetsuya Kawanishi (Waseda Univ.), Ryo Inohara (KDDI Research) PN2020-36 EMT2020-54 MWP2020-37
A proof-of-concept experiment is demonstrated for 5G end-to-end MFH system based on hybrid IFoF and RoF/RoMMF transmissi... [more] PN2020-36 EMT2020-54 MWP2020-37
Online Online [Invited Lecture] Transmission Experiments on IF-over-Fiber Systems for Mobile Fronthaul
Kazuki Tanaka, Hsuan-Yun Kao, Shota Ishimura, Kosuke Nishimura, Ryo Inohara (KDDI Research) CS2020-40
 [more] CS2020-40
OPE, LQE, OCS 2019-11-11
Tokyo Kikai-Shinko-Kaikan Bldg (Tokyo) [Special Invited Talk] SSBI-free SSB-DD transmission scheme using phase modulation for high-quality analog mobile fronthaul
Shota Ishimura, Hsuan-Yun Kao, Kazuki Tanaka,, Kosuke Nishimura, Masatoshi Suzuki (KDDI Research) OCS2019-59 OPE2019-97 LQE2019-75
In this invited talk, we introduce a signal-to-signal beat interference (SSBI)-free direct-detection transmission system... [more] OCS2019-59 OPE2019-97 LQE2019-75
OCS, LQE, OPE 2019-10-17
Kagoshima   [Invited Talk (Young Researcher)] Analog radio-over-fiber transmission technology for mobile fronthaul networks
Shota Ishimura (KDDI Research, Inc.) OCS2019-36 OPE2019-74 LQE2019-52
This invited paper discusses the potential of the Intermediate Frequency over Fiber (IFoF) technology for future mobile ... [more] OCS2019-36 OPE2019-74 LQE2019-52
LQE, OPE, CPM, EMD, R 2019-08-23
Miyagi   [Invited Talk] Simplified optical transceiver configurations for low-cost coherent transmission
Takuo Tanemura (Univ. Tokyo), Shota Ishimura (Univ. Tokyo/KDDI Research), Peng Zhou, Takahiro Suganuma, Yoshiaki Nakano (Univ. Tokyo) R2019-30 EMD2019-28 CPM2019-29 OPE2019-57 LQE2019-35
 [more] R2019-30 EMD2019-28 CPM2019-29 OPE2019-57 LQE2019-35
Okinawa Nobumoto Ohama Memorial Hall (Ishigaki Island) [Special Invited Talk] Technical Trends of Mobile Fronthaul/Backhaul from 5G and Beyond
Kosuke Nishimura, Shota Ishimura, Abdelmoula Bekkali, Kazuki Tanaka, Haruhisa Hirayama, Yu Tsukamoto, Ryo Inohara, Shinobu Nanba, Masatoshi Suzuki (KDDI Research, Inc.) CS2018-91
(Advance abstract in Japanese is available) [more] CS2018-91
OPE, LQE, OCS 2018-10-19
Saga   DSP algorithms in Stokes vector receivers for short-reach optical transmission systems
Shota Ishimura, Kosuke Nishimura (KDDI Research, Inc.) OCS2018-50 OPE2018-86 LQE2018-75
We propose novel blind polarization tracking algorithms for the Stokes vector receivers, applying the concept of the con... [more] OCS2018-50 OPE2018-86 LQE2018-75
MWP 2017-11-09
Tokyo Kikai-Shinko-Kaikan Bldg. Broadband IF-over-Fiber Transmission with Parallel IM/PM Transmitter Overcoming Dispersion-Induced RF Power Fading for High-Capacity Mobile Fronthaul Links
Shota Ishimura (KDDI Research, Inc), Byung Gon Kim (KAIST), Kazuki Tanaka, Kosuke Nishimura (KDDI Research, Inc), Hoon Kim, Yun C. Chung (KAIST), Masatoshi Suzuki (KDDI Research, Inc) MWP2017-47
We demonstrate a high-capacity IF-over-Fiber (IFoF) transmission using a parallel Intensity modulator (IM) /phase modula... [more] MWP2017-47
MWP 2017-05-11
Tokyo Kikai-Shinko-Kaikan Bldg. [Invited Talk] Optical and Radio Converged Access Network for Accommodating Mobile Services in Beyond-5G Era
Kosuke Nishimura, Shinobu Nanba, Kazuki Tanaka, Shota Ishimura, Masatoshi Suzuki (KDDI Research) MWP2017-3
In this report, optical and radio converged access network for accommodating 5G and beyond mobile services is overviewed... [more] MWP2017-3
(Joint) [detail]
Hiroshima   Experimental demonstration of 8-state Trellis-coded 4D-QPSK optical modulation scheme
Shota Ishimura, Kazuro Kikuchi (Univ. of Tokyo) OCS2014-88
Recently, in coherent optical communication systems, 4-dimesnional (4D) modulation formats designed by using two degrees... [more] OCS2014-88
LQE, OCS, OPE 2013-10-25
Fukuoka   Multi-dimensional modulation and demodulation schemes in coherent optical communication systems
Shota Ishimura, Kazuro Kikuchi (Univ. of Tokyo) OCS2013-81 OPE2013-127 LQE2013-97
In newly-developed coherent optical communication systems, we can employ four-dimensional optical modulation including t... [more] OCS2013-81 OPE2013-127 LQE2013-97
 Results 1 - 18 of 18  /   
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