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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 15 of 15  /   
Committee Date Time Place Paper Title / Authors Abstract Paper #
WBS, MICT 2018-07-06
09:45
Kanagawa Yokohama Mitsui Building [Poster Presentation] Improvement of Packet Success Rate Performance on On-demand WSN with MPOMS
Yutaka Imaizumi, Hiromasa Habuchi (Ibaraki Univ.), Koichiro Hashiura (Akita Prefectural Univ.) WBS2018-11 MICT2018-31
Radio-on-demand wireless sensor networks (WSN) are considered as one of WSN systems. To solve all node wake-up problem a... [more] WBS2018-11 MICT2018-31
pp.35-40
AP, RCS
(Joint)
2017-11-08
16:45
Fukuoka Fukuoka University Low latency ARQ scheme for Wireless entrance systems for 5G small cell base stations
Atsushi Ohta, Satoshi Kurosaki, Kazuto Goto, Yutaka Imaizumi, Naoki Kita (NTT) RCS2017-218
Toward 5th generation mobile communications system, various researches for small cells with massive MIMO, which are effe... [more] RCS2017-218
pp.75-80
SAT 2012-10-25
10:30
Overseas Korea Seoul Small Satellite Earth Stations for Disaster Recovery Operations
Takashi Hirose, Yoshinori Suzuki, Yutaka Imaizumi (NTT) SAT2012-45
 [more] SAT2012-45
pp.119-124
AP, SAT
(Joint)
2012-07-26
13:40
Hokkaido Hokkaido Univ. Development of Small Satellite Earth Station System -- Next Satellite communicaiton system for disaster recovery operation --
Yutaka Imaizumi, Takashi Hirose, Hidekuni Yoshida (NTT) SAT2012-11
NTT Access Network Service Systems Laboratories has developed small satellite earth stations for satellite communication... [more] SAT2012-11
pp.19-23
SAT 2011-12-13
11:35
Aichi Nagoya University Satellite communications systems used in disaster recovery operations after the Great East Japan Earthquake and tsunami
Takashi Hirose, Kazuhiko Ohta, Yutaka Imaizumi, Hidekuni Yoshida (NTT) SAT2011-57
 [more] SAT2011-57
pp.109-113
WBS, SAT
(Joint)
2010-06-11
11:10
Okinawa Okinawa-ken-Seinen-Kaikan Field Trials on Hyper Multi-Point SATCOM system
Kiyoshi Kobayashi, Katsuya Nakahira, Yutaka Imaizumi, Yoshinori Suzuki (NTT Corp.), Norito Tomimizu (NTT Comm Corp.) SAT2010-7
We have developed a prototype of the hyper multi-point data gathering SATCOM system that aggregates various sensor data ... [more] SAT2010-7
pp.33-38
SAT 2009-10-29
15:20
Nara Nara Prefectural New Public Hall System Verification Results of Hyper-Multipoint Data Gathering SATCOM System
Kiyoshi Kobayashi, Yoshinori Suzuki, Yutaka Imaizumi, Katsuya Nakahira (NTT Corp.) SAT2009-26
This paper presents in-laboratory system verification results of a hyper-multipoint data gathering satellite communicati... [more] SAT2009-26
pp.47-52
RCS, SAT
(Joint)
2007-12-21
11:15
Oita   Experimental Verification of a High Precision Transmission Frequency Control Technique for Hyper Multipoint Data Gathering Satellite Communication Systems
Yutaka Imaizumi, Yoshinori Suzuki, Kiyoshi Kobayashi, Kohei Ohata (NTT) SAT2007-59
NTT has proposed “Hyper-Multipoint data gathering satellite communication systems” as the sensor network system taking i... [more] SAT2007-59
pp.19-24
SAT 2007-11-02
14:30
Okinawa Okinawaken-Seinen-Kaikan In-orbit test of an onboard beam forming network for Engineering Test Satellite VIII -- Novel antenna pattern measurement method and antenna pattern measurement results --
Yoshinori Suzuki, Yutaka Imaizumi, Kohei Ohata (NTT) SAT2007-48
ETS-VIII is the eighth engineering test satellite with an objective of demonstrating mobile satellite communication syst... [more] SAT2007-48
pp.177-182
AP, SAT
(Joint)
2007-07-20
10:30
Hokkaido Daiichi-Takimotokan(Noboribetsu) Initial in-orbit checkout results of beam forming network on Engineering Test Satellite VIII
Yutaka Imaizumi, Yoshinori Suzuki, Kohei Ohata (NTT) SAT2007-16
The Engineering Test Satellite VIII (ETS-VIII) that was launched on December 18, 2006 was equipped with two large-scale ... [more] SAT2007-16
pp.23-26
SAT 2007-04-20
13:50
Mie Mie University Hyper-Multipoint Data Gathering Satellite Communication Systems for Safe and Secure Society
Kohei Ohata, Satoshi Harada, Katsuya Nakahira, Yutaka Imaizumi, Kiyoshi Kobayashi, Hiroshi Kazama (NTT) SAT2007-3
The need of nation-wide and consolidated sensor network systems that gather every sort of environmental observation data... [more] SAT2007-3
pp.13-18
SAT 2007-02-16
13:55
Shiga Ritsumeikan Univ. A study on antenna pattern measurement for Engineering Test Satellite VIII
Yoshinori Suzuki, Yutaka Imaizumi, Kohei Ohata (NTT) SAT2006-59
The ETS-VIII is the eighth engineering test satellite with an objective of demonstrating mobile satellite communication ... [more] SAT2006-59
pp.7-10
SAT 2006-10-20
14:50
Overseas KAL Hotel (Jeju-Do, Korea) Satellite link availability analysis using 3-dimensional map data
Yutaka Imaizumi, Kohei Ohata, Masazumi Ueba (NTT)
We propose a method of simulating satellite link availability that uses three dimensional map data. Our method calculate... [more]
AP, SAT
(Joint)
2006-05-18
13:30
Kagoshima Kagoshima Univ. Measurements of wideband propagation characteristics in railway tunnel
Yutaka Imaizumi, Kiyoshi Kobayashi, Hiroaki Tsunoda, Kohei Ohata (NTT), Masakatsu Yoshizawa, Seiji Imai (JR-CENTRAL) SAT2006-1
We are examining the application of a Ku-band mobile satellite communication system as a means to offer broadband commun... [more] SAT2006-1
pp.1-6
SAT 2006-01-20
14:20
Hiroshima Hiroshima International University A study on the satellite propagation prediction method using 3-dimensional map data
Yutaka Imaizumi, Kohei Ohata, Masazumi Ueba (NTT)
In land mobile satellite communications, a major problem is the frequent blockage of the satellite link by buildings, tr... [more] SAT2005-45
pp.13-18
 Results 1 - 15 of 15  /   
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