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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| ASN, NS, RCS, SR, RCC (Joint) |
2018-07-13 15:50 |
Hokkaido | Hakodate Arena | A Fundamental Study on Large-Scale SCMA Signal Detection Using GaBP Renjie Li, Toshihiko Nishimura, Takeo Ohgane, Yasutaka Ogawa, Junichiro Hagiwara (Hokkaido Univ.)  RCS2018-127 |
SCMA has attracted attention as a brand-new communication technology that is suitable for device-to-device communication... [more] | RCS2018-127 pp.237-242 |
| RCS | 2018-06-21 10:40 |
Nagasaki | Nagasaki University | A Fundamental Study on Superposition Modulated Signal Detection Using Belief Propagation Kentaro Fukuda, Toshihiko Nishimura, Takeo Ohgane, Yasutaka Ogawa, Junichiro Hagiwara (Hokkaido Univ.) RCS2018-49 |
It is known that superposition modulation can generate a Gaussian modulated signal by superimposing a large number of si... [more] | RCS2018-49 pp.85-88 |
| RCS | 2018-06-21 11:10 |
Nagasaki | Nagasaki University | Evaluation of Loose Beamforming with a Genetic Algorithm in a Multiuser Massive MIMO System Shunta Nakamura, Toshihiko Nishimura, Takeo Ohgane, Yasutaka Ogawa, Junichiro Hagiwara (Hokkaido Univ.) RCS2018-52 |
In the 5th generation mobile communication system, implementation of a large-scale multiple-input multiple-output syste... [more] |
RCS2018-52 pp.101-106 |
| RCS | 2018-06-22 16:05 |
Nagasaki | Nagasaki University | A Study on Superposed 16QAM Signal Detection Using GaBP in Massive MIMO Taisei Watabe, Toshihiko Nishimura, Takeo Ohgane, Yasutaka Ogawa, Junichiro Hagiwara (Hokkaido Univ.) RCS2018-78 |
A massive MIMO system, which uses about 100 or more antennas for transmitting and receiving, enables high-speed and larg... [more] | RCS2018-78 pp.255-260 |
| RCS | 2018-06-22 16:30 |
Nagasaki | Nagasaki University | Considerations on Computational Complexity Reduction of Receive Weight Matrices in Massive MIMO SC-FDE Kensei Saito, Yasutaka Ogawa, Toshihiko Nishimura, Takeo Ohgane, Junichiro Hagiwara (Hokkaido Univ.) RCS2018-79 |
[more] | RCS2018-79 pp.261-266 |
| CQ, MoNA, IPSJ-DPS, IPSJ-CN, IPSJ-EIP (Joint) [detail] |
2013-09-13 12:05 |
Ishikawa | Kanazawa Institute of Technology | [Special Talk]
Development of Mobile Network in DOCOMO Akira Yamada, Junichiro Hagiwara (NTT DOCOMO) CQ2013-46 MoNA2013-35 |
In this paper, trends of mobile network and DOCOMO’s effort for expanding LTE service are described. Due to becoming int... [more] | CQ2013-46 MoNA2013-35 pp.107-111(CQ), pp.55-59(MoNA) |
| RCS | 2011-04-22 13:55 |
Kanagawa | Keio University | A Study on Resource Allocation of VoIP Traffic Employing Sub-frame Bundling and Non Real-time Traffic in LTE Uplink Masashige Shirakabe, Yoshiaki Ofuji, Akihito Hanaki, Nobuhiko Miki, Takahiro Asai, Junichiro Hagiwara (NTT DOCOMO) RCS2011-15 |
[more] | RCS2011-15 pp.83-88 |
| ICM | 2011-03-10 09:00 |
Okinawa | Miyakojima Marine Terminal | A study on silent failure detection using base station traffic information Hironobu Kouno, Yuta Sagae, Anass Benjebbour, Masanori Furutani, Junichiro Hagiwara (NTT DOCOMO,INC) ICM2010-54 |
Communication networks are becoming an essential part of our life infrastructure. Their reliability and security are the... [more] | ICM2010-54 pp.1-6 |
| RCS, MoNA, SR (Joint) |
2011-03-03 11:30 |
Kanagawa | YRP | A Study on Management Technique of Carrier Aggregation in LTE-Advanced Kengo Yagyu, Takeshi Nakamori, Hiroyuki Ishii, Mikio Iwamura, Nobuhiko Miki, Takahiro Asai, Junichiro Hagiwara (DOCOMO) RCS2010-272 |
The standardization of LTE-Advanced (LTE-A) as an enhanced form of LTE is now underway at the 3rd Generation Partnership... [more] | RCS2010-272 pp.145-150 |
| RCS, MoNA, SR (Joint) |
2011-03-03 14:15 |
Kanagawa | YRP | [Invited Talk]
Wireless LAN Standardization Status
-- For Inter-system Handover -- Akira Yamada, Yousuke Sano, Yasufumi Morioka, Junichiro Hagiwara (NTT DOCOMO), Fujio Watanabe (DOCOMO USA Lab) RCS2010-276 MoMuC2010-89 SR2010-103 |
Internet access schemes become diverse with a growth of smartphone market. Inter-system coordination between 3G cellular... [more] | RCS2010-276 MoMuC2010-89 SR2010-103 pp.161-166(RCS), pp.53-58(MoMuC), pp.95-100(SR) |
| RCS, MoNA, SR (Joint) |
2011-03-03 16:45 |
Kanagawa | YRP | [Invited Talk]
Retransmission Request Scheme for Multimedia Broadcasting Content Delivery Hosei Matsuoka, Akira Yamada (NTT DOCOMO), Tomoyuki Ohya (Multimedia Broadcasting), Ryo Kitahara, Junichiro Hagiwara (NTT DOCOMO) RCS2010-280 MoMuC2010-93 SR2010-107 |
[more] | RCS2010-280 MoMuC2010-93 SR2010-107 pp.183-188(RCS), pp.75-80(MoMuC), pp.117-122(SR) |
| CS, IPSJ-AVM, ITE-BCT, IE [detail] | 2010-12-02 15:15 |
Kyoto | Nagoya Univ | File-Casting Technologies for ISDB-Tmm Akira Yamada, Hosei Matsuoka (NTT DOCOMO), Tomoyuki Ohya (mmbi), Ryo Kitahara, Junichiro Hagiwara (NTT DOCOMO) |
[more] | |
| RCS, SAT (Joint) |
2009-12-18 11:30 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | Effect of Sub-frame Bundling on VoIP Traffic in LTE Uplink Masashige Shirakabe, Yoshiaki Ofuji, Akihito Hanaki, Takahiro Asai, Junichiro Hagiwara (NTT DOCOMO) RCS2009-189 |
[more] | RCS2009-189 pp.131-136 |
| AP, SAT (Joint) |
2009-07-10 15:40 |
Hokkaido | Otaru city, Hokkaido | The resolution improvement of DoA estimation using SAGE algorithm and Extended Root-MUSIC algorithm with Array Interpolation Kentaro Saito, Koshiro Kitao, Tetsuro Imai, Junichiro Hagiwara, Yoshiki Okano (DOCOMO) AP2009-75 |
MIMO transmission technologies have been investigated and are expected to realize the wide-band and high-speed radio com... [more] | AP2009-75 pp.183-188 |
| AP | 2009-05-22 09:30 |
Kumamoto | Kumamoto Univ. | A Study on Construction of Spatial Channel Emulator for MIMO Performance Evaluation of Mobile Terminals Tetsuro Imai, Yoshiki Okano, Koshiro Kitao, Kentaro Saito, Junichiro Hagiwara (NTT DOCOMO) AP2009-25 |
At the present, techniques for evaluating MIMO performance of mobile terminals in laboratories are investigated. Spatial... [more] | AP2009-25 pp.81-86 |
| AP | 2009-05-22 09:55 |
Kumamoto | Kumamoto Univ. | Relation Between Angle Spread of Arriving Waves and Alignment of Scatterer antennas for Spatial Channel Emulator Yoshiki Okano, Tetsuro Imai, Koshiro Kitao, Kentaro Saito, Junichiro Hagiwara (NTT DOCOMO) AP2009-26 |
It is noted that the OTA (Over-The-Air) performance of MIMO mobile terminals employing multi-antennas must be evaluated ... [more] | AP2009-26 pp.87-92 |
| AP | 2009-05-22 10:20 |
Kumamoto | Kumamoto Univ. | A study on spatio-temporal dynamic channel properties based on channel sounder measurements Koshiro Kitao, Kentaro Saito, Yoshiki Okano, Tetsuro Imai, Junichiro Hagiwara (NTT DOCOMO) AP2009-27 |
Lately, a lot of channel models for MIMO system evaluation based on measurement data are studied. Moreover, dynamic prop... [more] | AP2009-27 pp.93-97 |
| RCS | 2008-06-27 16:25 |
Mie | Mie University | On the Gains of MU-MIMO Coordinated Base Stations Transmission Anass Benjebbour, Masashige Shirakabe, Yusuke Ohwatari, Junichiro Hagiwara, Tomoyuki Ohya (NTT DoCoMo) RCS2008-29 |
Interference management is essential toward improving spectral efficiency in wireless networks. During the last decade i... [more] | RCS2008-29 pp.79-84 |
| RCS | 2008-06-27 17:15 |
Mie | Mie University | Complexity-Reduced Transmit Power Optimization Techniques for Multiuser MIMO with Per-Antenna Power Constraint Yusuke Ohwatari, Anass Benjebbour, Junichiro Hagiwara, Tomoyuki Ohya (NTT DoCoMo) RCS2008-31 |
For a (MU)-MIMO precoded transmission with individual constraints on the maximum power of each transmit antenna, the pro... [more] | RCS2008-31 pp.91-96 |
| NS, RCS (Joint) |
2007-07-20 10:50 |
Hokkaido | Kitami Institute of Tech. | An Evaluation of Hidden Node Problem Aware Routing Metrics in WLAN Mesh Networks Jaturong Sangiamwong, Toshihiro Suzuki, Junichiro Hagiwara (NTT DoCoMo) RCS2007-46 |
This paper proposes hidden node problem aware routing metrics in wireless LAN (WLAN) mesh networks. To reflect impact o... [more] |
RCS2007-46 pp.103-108 |
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