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 |