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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| SAT | 2011-12-12 16:10 |
Aichi | Nagoya University | A study of interference estimation of terrestrial IMT systems to mobile satellite system in IMT-satellite band Kohei Ohata, Susumu Ueno (SKY Perfect JSAT)  SAT2011-51 |
The allocated frequency band for IMT-satellite system (S-IMT) is adjacent to Terrestrial IMT systems (T-IMT) core band a... [more] | SAT2011-51 pp.77-82 |
| SAT, WBS (Joint) |
2008-05-27 13:50 |
Chiba | Nihon Univ. (Tsudanuma) | A Study of Channel Allocation Algorithm for Novel Polarization Tracking Free Ku-band Mobile Satellite Communication Systems Katsuya Nakahira, Kiyoshi Kobayashi, Kohei Ohata (NTT) SAT2008-3 |
[more] | SAT2008-3 pp.13-18 |
| SANE, SAT (Joint) |
2008-02-28 14:30 |
Ibaraki | Kashima Space Research Center (NICT) | Verification of design method by trial model for an ultra-lightweight large deployable antenna reflector composed of a tendon reinforced support structure. Satoshi Harada, Kiyoshi Kobayashi, Kohei Ohata (NTT), Hiroyuki Ohmine, Takahiko Noda (Mitsubishi Electric) SAT2007-61 |
NTT has been investigating an ultra-lightweight and large onboard antenna reflector, which is 20m in diameter and less t... [more] | SAT2007-61 pp.1-6 |
| 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 |
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| SAT | 2007-11-02 13:00 |
Okinawa | Okinawaken-Seinen-Kaikan | Proposal of VPFDM demodulator resistant to both Tx/Rx polarization rotations Fumihiro Yamashita, Jun-ichi Abe, Kiyoshi Kobayashi, Kohei Ohata (NTT) SAT2007-44 |
Authors have proposed Variable Polarization Frequency Division Multiplexing (VPFDM) and a demodulator that cancels the c... [more] | SAT2007-44 pp.151-156 |
| 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 09:20 |
Hokkaido | Daiichi-Takimotokan(Noboribetsu) | A Highly Efficient and Flexible Channel Control Method for Hyper-Multi-Point Data Gathering Satellite System Katsuya Nakahira, Kiyoshi Kobayashi, Kohei Ohata (NTT) SAT2007-13 |
[more] | SAT2007-13 pp.7-12 |
| 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 |
| WBS, SAT (Joint) |
2007-06-05 15:15 |
Ibaraki | Ibaraki Univ. | A Study of Improvment in the Data Filling Rate of an Optimal Frequency Assignment Scheme for Multi-Point Data Gathering Satellite Communication Systems Satoshi Harada, Kiyoshi Kobayashi, Kohei Ohata (NTT) SAT2007-8 |
NTT has proposed Hyper Multi-Point Data Gathering Satellite Communication Systems. From the viewpoint of efficient frequ... [more] | SAT2007-8 pp.1-6 |
| WBS, SAT (Joint) |
2007-06-05 15:40 |
Ibaraki | Ibaraki Univ. | Multi-carrier / Multi-rate Arbitrary Frequency Assignment Modem Kiyoshi Kobayashi, Fumihiro Yamashita, Jun-ichi Abe, Kohei Ohata (NTT) SAT2007-9 |
This paper proposes an arbitrary frequency assignment multi-rate filter bank (AMFB) - type frequency demultiplexer / mul... [more] | SAT2007-9 pp.7-12 |
| 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 | 2007-02-16 14:20 |
Shiga | Ritsumeikan Univ. | Resource Management Protocol for Next-generation Multi-beam Mobile Satellite Communication Systems Katsuya Nakahira, Kiyoshi Kobayashi, Kohei Ohata (ＮＴＴ) SAT2006-60 |
[more] | SAT2006-60 pp.11-16 |
| 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 |
| SAT | 2005-02-25 16:20 |
Saitama | Experimental Evaluation for Low Coupling Gap-Filler using Null Control Tomihiko Yoshida, Kiyoshi Kobayashi, Kohei Ohata, Masazumi Ueba (NTT) |
To expand service areas of a future satellite communication network, this paper proposes a simple configuration and the ... [more] | SAT2004-169 pp.17-20 |
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