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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 13 of 13  /   
Committee Date Time Place Paper Title / Authors Abstract Paper #
SAT, RCS
(Joint)
2020-08-21
09:50
Online Online A Study on Robust Beamforming Design for Millimeter-Wave Communications with Stochastic Blockages
Ryo Okabe (The Univ. of Electro-Communications), Hiroki Iimori (JUB), Koji Ishibashi (The Univ. of Electro-Communications) RCS2020-84
 [more] RCS2020-84
pp.29-34
RCS 2019-06-21
10:20
Okinawa Miyakojima Hirara Port Terminal Building A Study on Energy-Efficient Design of Irregular Repetition Slotted ALOHA with Stochastic Power Control
Ryo Okabe, Masaru Oinaga, Shun Ogata, Koji Ishibashi (The Univ. of Electro-Communications) RCS2019-87
Irregular repetition slotted ALOHA based on non-orthogonal multiple acces (IRSA-NOMA) utilizes stochastic power control ... [more] RCS2019-87
pp.291-296
MBE, BioX, NC 2016-10-22
16:30
Osaka Osaka Electro-Communication University A study on improving authentication accuracy for a multifactor authentication system considering usage environment
Tomoaki Higashi, Ryo Okabe, Yasushi Yamazaki (Kitakyushu Univ.), Tetsushi Ohki (AIST) BioX2016-29 MBE2016-43 NC2016-28
As a means of more secure and convenient user authentication for rapidly spreading smart devices, we have proposed a mul... [more] BioX2016-29 MBE2016-43 NC2016-28
pp.67-72
OCS, NS, PN
(Joint)
2016-06-23
16:05
Hokkaido Hokkaido University [Invited Talk] SDN Orchestration of EU-Japan Optical Network Testbeds -- the STRAUSS Project --
Yuki Yoshida (NICT), Ken-ichi Kitayama (GPI), Noboru Yoshikane, Xiaoyuan Cao, Takahiro Tsuritani, Itsuro Morita (KDDI R&D Labs.), Yutaka Kai, Masato Nishihara, Ryo Okabe, Toshiki Tanaka, Tomoo Takahara, Jens Rasmussen (Fujitsu), Masaki Shiraiwa, Yoshinari Awaji, Naoya Wada (NICT) NS2016-37 OCS2016-13 PN2016-7
The framework and technological achievements of the EU-JP project, STRAUSS, are introduced. The STRAUSS project aims to ... [more] NS2016-37 OCS2016-13 PN2016-7
p.53(NS), p.23(OCS), p.13(PN)
PRMU, BioX 2016-03-24
13:00
Tokyo   A smart device-based multifactor authentication system based on context awareness
Ryo Okabe, Tomoaki Higashi, Yasushi Yamazaki (Kitakyushu Univ.), Tetsushi Ohki (AIST) BioX2015-47 PRMU2015-170
In user authentication on smart devices, such as
smart-phones and tablet PCs, it is difficult to maintain a
usage envi... [more]
BioX2015-47 PRMU2015-170
pp.37-42
BioX, ITE-ME, ITE-IST 2015-06-30
09:15
Ishikawa Kanazawa University, Kakuma Campus A study on multimodal biometric authentication using smart devices
Ryo Okabe, Yasushi Yamazaki (The Univ. of Kitakyushu) BioX2015-8
With the rapid spread of smart devices such as smart phones
and tablet PCs, person authentication for the purpose of
p... [more]
BioX2015-8
pp.61-66
AP 2015-01-23
14:20
Ehime Ehime University A consideration on beam adjustable planar array antennas with narrow-width microstrip antenna elements
Ryo Okabe, Sakuyoshi Saito, Yuichi Kimura (Saitama Univ.) AP2014-182
This paper presents beam adjustable microstrip antenna arrays (BA-MSAAs) with narrow-width elements. The BA-MSAA consist... [more] AP2014-182
pp.121-126
OCS, OPE, LQE 2014-10-31
15:40
Nagasaki Nagasaki Museum of History and Culture [Invited Talk] Discrete Multi-Tone Technology for Short Reach Application
Ryo Okabe, Toshiki Tanaka, Masato Nishihara, Yutaka Kai, Tomoo Takahara, Jens C. Rasmussen (FUJITSU) OCS2014-81 OPE2014-125 LQE2014-99
 [more] OCS2014-81 OPE2014-125 LQE2014-99
pp.205-210
LQE, OCS, OPE 2013-10-25
17:10
Fukuoka   Precisely frequency allocated multiplexing at distributed point using fiber frequency conversion
Tomoyuki Kato, Ryo Okabe (Fujitsu Lab.), Thomas Richter, Robert Elschner, Carsten Schmidt-Langhorst, Colja Schubert (HHI), Shigeki Watanabe (Fujitsu Lab.) OCS2013-80 OPE2013-126 LQE2013-96
We extend our investigation on a recently proposed concept for distributed optical frequency division multiplexing (CO-O... [more] OCS2013-80 OPE2013-126 LQE2013-96
pp.153-158
NS, OCS, PN
(Joint)
2012-06-21
15:10
Yamagata Yamagata Univ. Frequency Conversion, Synchronization Control, and Multiplexing Using Cross-Phase Modulation
Tomoyuki Kato, Ryo Okabe (Fujitsu lab.), Robert Elschner, Thomas Richter, Colja Schubert (HHI), Shigeki Watanabe (Fujitsu lab.) OCS2012-13
(Advance abstract in Japanese is available) [more] OCS2012-13
pp.23-28
PN, OCS, NS
(Joint)
2011-06-23
15:40
Wakayama Wakayama University All-optical Data Frequency Multiplexing on Single-Wavelength Carrier Light by Sequentially Provided Cross-Phase Modulation in Fiber
Shigeki Watanabe, Tomoyuki Kato, Ryo Okabe (Fujitsu Labs.), Robert Elschner, Reinhold Ludwig, Colja Schubert (HHI) OCS2011-18
A novel configuration for an all-optical bus-topology data-multiplexing system is proposed in which multichannel signals... [more] OCS2011-18
pp.39-44
OCS, NS, PN
(Joint)
2010-06-24
11:10
Akita Akita University Investigation on the reduction of signal amplitude fluctuation using limiting amplification with optical fiber parametric limiter amplifier
Tomoyuki Kato, Ryo Okabe, Shigeki Watanabe (Fujitsu lab.) OCS2010-12
(Advance abstract in Japanese is available) [more] OCS2010-12
pp.7-12
OCS, OPE, LQE 2005-11-03
16:35
Fukuoka   160Gb/s Optical Demultiplexing with Enhanced Timing Margin by Unequally Aligning Pulse Position
Fumio Futami, Ryo Okabe, Shunsuke Ono, Shigeki Watanabe (FUJITSU LABS)
 [more] OCS2005-54 OPE2005-84 LQE2005-92
pp.35-38
 Results 1 - 13 of 13  /   
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