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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 45  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
EMD, R, LQE, OPE, CPM 2022-08-26
11:25
Chiba  
(Primary: On-site, Secondary: Online)
Study on design of mosaic-based 2 × 2 3-dB power splitter in the mid infrared
Taichi Muratsubaki, Takeshi Fujisawa, Takanori Sato, Kunimasa Saitoh (Hokkaido Univ.)
(To be available after the conference date) [more]
RCS 2022-06-16
11:05
Okinawa University of the Ryukyus, Senbaru Campus and online
(Primary: On-site, Secondary: Online)
Direction of Arrival Estimation with Compressed Sensing Using Grid Shifts
Shudai Kunimoto, Toshihiko Nishimura, Takanori Sato, Yasutaka Ogawa, Junichiro Hagiwara, Takeo Ohgane (Hokkaido Univ.) RCS2022-47
 [more] RCS2022-47
pp.138-143
RCS 2022-06-16
11:15
Okinawa University of the Ryukyus, Senbaru Campus and online
(Primary: On-site, Secondary: Online)
Considerations on IRS Control based on Beamforming for Sub-Terahertz Band Communications
Shuto Tadokoro, Toshihiko Nishimura, Takanori Sato, Yasutaka Ogawa, Junichiro Hagiwara, Takeo Ohgane (Hokkaido Univ.) RCS2022-48
 [more] RCS2022-48
pp.144-149
RCS 2022-06-16
14:30
Okinawa University of the Ryukyus, Senbaru Campus and online
(Primary: On-site, Secondary: Online)
Comparison of Performance and Complexity for different Search Methods in Stochastic MIMO Signal Detection
Hiroki Asumi, Yukiko Kasuga, Kazushi Matsumura, Junichiro Hagiwara, Toshihiko Nishimura, Takanori Sato, Yasutaka Ogawa, Takeo Ohgane (Hokkaido Univ.) RCS2022-49
In large-scale MIMO signal detection, the computational complexity increases as the number of antennas increases. We hav... [more] RCS2022-49
pp.150-155
RCS 2022-06-16
14:55
Okinawa University of the Ryukyus, Senbaru Campus and online
(Primary: On-site, Secondary: Online)
A study on model parameters for MIMO signal detection using learned AMP
Mari Miyoshi, Toshihiko Nishimura, Takanori Sato, Takeo Ohgane, Yasutaka Ogawa, Junichiro Hagiwara (Hokkaido Univ.) RCS2022-50
Approximate message passing (AMP) is applicable to massive MIMO signal detection and achieves a high detection performan... [more] RCS2022-50
pp.156-161
RCS 2022-06-17
14:00
Okinawa University of the Ryukyus, Senbaru Campus and online
(Primary: On-site, Secondary: Online)
Fundamental Considerations on Channel Prediction Based on Multipath Delay and Angle-of-Arrival Estimation for Sub-Terahertz Band Communications
Daigo Mochizuki, Toshihiko Nishimura, Takanori Sato, Yasutaka Ogawa, Junichiro Hagiwara, Takeo Ohgane (Hokkaido Univ.) RCS2022-63
A sub-Terahertz band above 100 GHz will be used in 6G for extremely high-speed communication. In such a high frequency b... [more] RCS2022-63
pp.230-235
OPE, OFT, OCS
(Joint) [detail]
2022-02-25
13:05
Online Online Group delay spread reduction using coupled multicore fibers with twist and bend
Kazushi Homma, Takanori Sato, Takeshi Fujisawa (Hokkaido Uni.), Yuto Sagae, Taiji Sakamoto, Takashi Matsui, Kazuhide Nakajima (NTT), Kunimasa Saitoh (Hokkaido Uni.) OCS2021-49 OFT2021-79 OPE2021-64
We investigate mode coupling characteristics in coupled multicore fibers with twist and bend for reducing the group dela... [more] OCS2021-49 OFT2021-79 OPE2021-64
pp.40-45(OCS), pp.49-54(OFT), pp.78-83(OPE)
PN, MWP, EMT, PEM, IEE-EMT [detail] 2022-01-28
15:45
Online Online Mach-Zehnder optical modulator with tunable multimode interference coupler of Ti:LiNbO3 waveguides for modulation of high extinction ratio
Anna Hirai, Shotaro Yasumori, Yuichi Matsumoto (Univ of Hyogo.), Takanori Sato (Hokkaido Univ.), Tadashi Kawai, Akira Enokihara (Univ of Hyogo.), Shinya Nakajima, Atsushi Kanno, Naokatsu Yamamoto (NICT) PN2021-48 EMT2021-64 MWP2021-53
A Mach-Zehnder optical modulator (MZM) with multimode interference (MMI) couplers using Ti-diffused LiNbO3 was considere... [more] PN2021-48 EMT2021-64 MWP2021-53
pp.85-90
RCS, SIP, IT 2022-01-21
09:25
Online Online Studies on Sub-Terahertz MIMO Spatial Multiplexing in an Indoor Propagation Environment
Taichi Utsuno, Toshihiko Nishimura, Takeo Ohgane, Yasutaka Ogawa, Junichiro Hagiwara, Takanori Sato (Hokkaido Univ.) IT2021-62 SIP2021-70 RCS2021-230
 [more] IT2021-62 SIP2021-70 RCS2021-230
pp.189-194
RCS, SIP, IT 2022-01-21
09:50
Online Online Studies on Channel Prediction in a Millimeter-Wave Band Based on Multipath Delay and Angle-of-Arrival Estimation
Daigo Mochizuki, Toshihiko Nishimura, Takeo Ohgane, Yasutaka Ogawa, Junichiro Hagiwara, Takanori Sato (Hokkaido Univ.) IT2021-63 SIP2021-71 RCS2021-231
A multi-user MIMO system can achieve high-capacity communication using downlink channel state information (CSI) for each... [more] IT2021-63 SIP2021-71 RCS2021-231
pp.195-200
R, LQE, OPE, CPM, EMD 2021-08-27
14:40
Online Online (Zoom) A design of highly fabrication-tolerant 2-µm 4-mode waveguide crossing based on mosaic structure
Taichi Muratsubaki, Takeshi Fujisawa, Yusuke Sawada, Takanori Sato, Kunimasa Saitoh (Hokkaido Univ.) R2021-26 EMD2021-7 CPM2021-16 OPE2021-27 LQE2021-6
A novel direct binary search algorithm for designing high-fabrication-tolerance mosaic-based devices is proposed, and wi... [more] R2021-26 EMD2021-7 CPM2021-16 OPE2021-27 LQE2021-6
pp.25-30
RCS, SR, NS, SeMI, RCC
(Joint)
2021-07-16
14:30
Online Online Considerations on Accuracy Improvement in Close DOA Estimation with Deep Learning
Yuya Kase, Toshihiko Nishimura, Takeo Ohgane, Yasutaka Ogawa, Takanori Sato (Hokkaido Univ.), Yoshihisa Kishiyama (NTT DOCOMO) RCC2021-39 NS2021-55 RCS2021-97 SR2021-39 SeMI2021-28
In addition to subspace methods such as MUSIC and ESPRIT, recently,
compressed sensing and deep learning have been appl... [more]
RCC2021-39 NS2021-55 RCS2021-97 SR2021-39 SeMI2021-28
pp.77-82(RCC), pp.118-123(NS), pp.98-103(RCS), pp.100-105(SR), pp.76-81(SeMI)
RCS 2021-06-23
09:30
Online Online Considerations on computational complexity reduction in channel prediction based on multipath separation
Daigo Mochizuki, Toshihiko Nishimura, Takeo Ohgane, Yasutaka Ogawa, Junichiro Hagiwara, Takanori Sato (Hokkaido Univ.) RCS2021-29
In multi-user MIMO systems, a base station suppresses inter-user-interferences using downlink channel state information ... [more] RCS2021-29
pp.1-6
RCS 2021-06-23
09:40
Online Online A Comparison of Variational Bayesian and Expectation Propagation Methods for Massive MIMO Signal Detection
Hiroki Asumi, Junichiro Hagiwara, Toshihiko Nishimura, Takeo Ohgane, Yasutaka Ogawa, Takanori Sato (Hokkaido Univ.) RCS2021-30
Signal detection in massive MIMO has difficulty in reducing computational complexity as the number of antennas increases... [more] RCS2021-30
pp.7-12
RCS 2021-06-23
09:50
Online Online A basic study on signal detection using learned approximate message passing
Mari Miyoshi, Wakaba Tsujimoto, Toshihiko Nishimura, Takeo Ohgane, Yasutaka Ogawa, Junichiro Hagiwara, Takanori Sato (Hokkaido Univ.) RCS2021-31
Approximate message passing (AMP) is applicable to massive MIMO signal detection and achieves a high detection performan... [more] RCS2021-31
pp.13-18
RCS 2021-06-23
16:35
Online Online A Study on the Behavior of LLR messages in Damped GaBP for Large-scale Signal Detection under a Correlated Channel
Daniel Akira Ando, Toshihiko Nishimura, Takeo Ohgane, Yasutaka Ogawa, Junichiro Hagiwara, Takanori Sato (Hokkaido Univ.) RCS2021-45
For large-scale signal detection, Gaussian Belief Propagation (GaBP) is known as a method providing a near-optimal perfo... [more] RCS2021-45
pp.97-102
RCS, SR, SRW
(Joint)
2021-03-05
17:20
Online Online [Encouragement Talk] A Study on Downlink Channel Estimation Based on Multipath Separation in a Wideband FDD System
Shiori Tosaka, Toshihiko Nishimura, Takeo Ohgane, Yasutaka Ogawa, Junichiro Hagiwara, Takanori Sato (Hokkaido Univ.) RCS2020-261
In an FDD system, downlink channel state information (CSI) is necessary at a base station for efficient transmission.
T... [more]
RCS2020-261
pp.267-272
EMT, MWP, PN, IEE-EMT [detail] 2021-01-21
13:25
Online Online Fabrication and Measurement of Optical Multi-mode Interference Devices Using Ti-diffused LiNbO3 Waveguides and Consideration on Voltage Control of Device Properties
Anna Hirai, Yuichi Matsumoto (Univ. of Hyogo), Takanori Sato (Hokkaido Univ.), Tadashi Kawai, Akira Enokihara (Univ. of Hyogo), Shinya Nakajima, Naokatsu Yamamoto (NICT) PN2020-34 EMT2020-52 MWP2020-35
Optical couplers based on Multi-mode interference (MMI) of Ti-diffused LiNbO3 (Ti:LN) waveguides were analyzed by the be... [more] PN2020-34 EMT2020-52 MWP2020-35
pp.28-31
SIP, IT, RCS 2021-01-21
13:10
Online Online Performance Evaluation of Loose Beamforming for Different Receiver Numbers
Tatsuki Otsuka, Toshihiko Nishimura, Takeo Ohgane, Takanori Sato, Junichiro Hagiwara, Yasutaka Ogawa (Hokkaido Univ.) IT2020-76 SIP2020-54 RCS2020-167
 [more] IT2020-76 SIP2020-54 RCS2020-167
pp.75-80
NS, RCS
(Joint)
2020-12-17
11:25
Online Online Improvement on Signal Detection Performance with HMC in Massive MIMO
Kazushi Matsumura, Junichiro Hagiwara, Toshihiko Nishimura, Takeo Ohgane, Yasutaka Ogawa, Takanori Sato (Hokkaido Univ.) RCS2020-135
In massive MIMO, a new technology for wireless transmission, various approaches to reduce the computational complexity a... [more] RCS2020-135
pp.7-12
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