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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| NS, SR, RCS, SeMI, RCC (Joint) |
2022-07-15 09:40 |
Ishikawa | The Kanazawa Theatre + Online (Primary: On-site, Secondary: Online) |
[Invited Lecture]
Evolution of Radio Access Network Brought by AI/ML Hiroyuki Kawai, Liu Liu, Issei Nakamura, Anxin Li, Yu Jiang, Lan Chen (DOCOMO Beijing Labs)  RCC2022-32 NS2022-50 RCS2022-93 SR2022-35 SeMI2022-37 |
In the complicated and diversified radio access networks (RANs) in 5G and beyond, artificial intelligence (AI)/machine l... [more] | RCC2022-32 NS2022-50 RCS2022-93 SR2022-35 SeMI2022-37 p.64(RCC), p.119(NS), p.126(RCS), p.72(SR), p.81(SeMI) |
| AP | 2014-06-12 15:45 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | System Capacity Improvement by Application of Small Cell Antenna Vertical Tilt Sho Yoshida, Tatsuhiko Yoshihara, Hiroyuki Kawai, Taisuke Ihara, Takahiro Takiguchi, Kengo Yagyu (NTT DOCOMO) AP2014-47 |
Recently, introduction of small cells with lower transmission power in hotspots within macro cells is being studied as a... [more] | AP2014-47 pp.41-46 |
| RCS, AP (Joint) |
2013-11-22 13:00 |
Shimane | Matsue Terrsa | [Tutorial Lecture]
Current Status of the Development of Base Station Antenna for Mobile Communication System Taisuke Ihara, Hiroyuki Kawai, Tatsuhiko Yoshihara, Sho Yoshida (NTT DOCOMO) AP2013-122 RCS2013-200 |
This paper explains the details of the Japan’s first base station antenna that is compatible with five frequency bands a... [more] | AP2013-122 RCS2013-200 pp.127-132(AP), pp.153-158(RCS) |
| AP | 2012-01-20 10:15 |
Fukuoka | Kyushu Inst. of Tech. | Study on Throughput Performance of MIMO Transmission in Passenger Trains Using Leaky Coaxial Cables Hiroyuki Kawai, Koshiro Kitao, Tetsuro Imai (NTT DOCOMO) AP2011-172 |
High-speed mobile communication services such as Long Term Evolution (LTE) that utilize multiple transmitter and receive... [more] | AP2011-172 pp.147-152 |
| NS, RCS (Joint) |
2007-07-20 14:20 |
Hokkaido | Kitami Institute of Tech. | Transmit Diversity Schemes Suitable for Common Control Channel in Evolved UTRA Downlink Akihito Morimoto, Hidekazu Taoka, Hiroyuki Kawai (NTT DoCoMo, Inc.), Kenichi Higuchi (Tokyo Univ. of Science), Mamoru Sawahashi (Musashi Institute of Tech.) RCS2007-50 |
[more] | RCS2007-50 pp.127-132 |
| RCS | 2007-06-29 14:35 |
Aichi | Toyohashi Uni. of Tech. | Performance Evaluation of Closed Loop-Based Antenna Switching Transmit Diversity Associated with Frequency Domain Channel-Dependent Scheduling in E-UTRA Uplink Hiroyuki Kawai, Hidekazu Taoka (NTT DoCoMo), Kenichi Higuchi (Tokyo Univ. of Science), Mamoru Sawahashi (Musashi Inst. of Tech.) RCS2007-25 |
[more] | RCS2007-25 pp.85-89 |
| RCS, NS (Joint) |
2006-07-21 18:10 |
Hokkaido | Hokkaido Univ. | Comparison of Inter-Node B Soft Handover Gain with Hard Handover for Packet-Based Single-Carrier-Based Evolved UTRA Uplink Hiroyuki Kawai, Akihito Morimoto, Kenichi Higuchi (NTT DoCoMo), Mamoru Sawahashi (Musashi Inst. of Tech.) RCS2006-103 |
[more] | RCS2006-103 pp.263-268 |
| CQ, RCS (Joint) |
2005-04-22 13:20 |
Kyoto | ATR | Overview of Experiment System for Achieving Over 1-Gbps Packet Transmission Using MIMO Channel for Broadband Packet Radio Access Junichiro Kawamoto, Noriyuki Maeda, Hiroyuki Kawai, Kenichi Higuchi, Mamoru Sawahashi (NTT DoCoMo) |
[more] | RCS2005-8 pp.7-12 |
| CQ, RCS (Joint) |
2005-04-22 13:40 |
Kyoto | ATR | Experiments on Adaptive Selection of Surviving Symbol Replica Candidates Based on the Maximum Reliability for QRM-MLD in Downlink Spread OFDM MIMO Multiplexing Hiroyuki Kawai, Junichiro Kawamoto, Noriyuki Maeda, Kenichi Higuchi, Mamoru Sawahashi (NTT DoCoMo) |
[more] | RCS2005-9 pp.13-18 |
| RCS, AP, WBS, MW, MoNA | 2005-03-03 13:40 |
Kanagawa | Yokosuka Research Park | High-Accuracy Channel Estimation Method using Decision Feedback from Turbo Decoder in QRM-MLD for OFDM MIMO Multiplexing Koichi Adachi, Riaz Esmailzadeh, Masao Nakagawa (Keio Univ.), Hiroyuki Kawai, Kenichi Higuchi (NTT DoCoMo) |
This paper proposes accurate channel estimation method using decision feedback data symbols after soft-decision Turbo de... [more] | WBS2004-114 AP2004-295 RCS2004-382 MoMuC2004-165 MW2004-292 pp.93-98 |
| RCS, CS | 2005-01-28 11:00 |
Okinawa | University of the Ryukyus | Performance comparison between OFDM and DS-CDMA radio access using MIMO multiplexing in multi-path fading channel Kenichi Higuchi, Junichiro Kawamoto, Hiroyuki Kawai, Noriyuki Maeda, Mamoru Sawahashi (NTT DoCoMo) |
(To be available after the conference date) [more] | CS2004-188 RCS2004-295 pp.31-36 |
| RCS | 2004-11-18 16:40 |
Gunma | Hotel Village, Kusatsu | Performance on Hybrid Method of Adaptive Selection and Independent Adaptive Control of Surviving Symbol Replica Candidates at Each Stage in QRM-MLD for MIMO Multiplexing Using OFCDM Wireless Access Hiroyuki Kawai, Noriyuki Maeda, Kenichi Higuchi, Mamoru Sawahashi (NTT DoCoMo) |
[more] | RCS2004-221 pp.61-66 |
| RCS | 2004-11-18 17:00 |
Gunma | Hotel Village, Kusatsu | Sphere Decoding with Adaptive Selection of Surviving Symbol Replica Candidates based on Maximum Reliability in QRM-MLD for MIMO Multiplexing Using OFCDM Wireless Access Noriyuki Maeda, Hiroyuki Kawai, Kenichi Higuchi, Mamoru Sawahashi (NTT DoCoMo) |
This paper proposes list sphere decoding (LSD) using adaptive selection of surviving symbol replica candidates in order ... [more] | RCS2004-222 pp.67-72 |
| RCS, AP | 2004-10-30 09:50 |
Niigata | Niigata University | MLD with QR Decomposition Using Bi-Direcitonal Ranking and Selection of Surviving Symbol Replica for OFCDM MIMO Multiplexing Noriyuki Maeda, Kenichi Higuchi, Hiroyuki Kawai, Mamoru Sawahashi (NTT DoCoMo) |
[more] | AP2004-185 RCS2004-206 pp.33-38 |
| RCS, AP | 2004-10-30 10:10 |
Niigata | Niigata University | Independent Adaptive Control of Surviving Symbol Replica Candidates at Each Stage Based on Minimum Branch Metric in QRM-MLD for OFCDM MIMO Multiplexing Hiroyuki Kawai, Kenichi Higuchi, Noriyuki Maeda, Mamoru Sawahashi (NTT DoCoMo) |
[more] | AP2004-186 RCS2004-207 pp.39-44 |
| RCS, NS | 2004-07-16 11:00 |
Hiroshima | Hiroshima International Univ. | Performance of Adaptive Selection Algorithm of Surviving Symbol Replica Candidates in QRM-MLD for MIMO Multiplexing Using OFCDM Wireless Access Hiroyuki Kawai, Noriyuki Maeda, Kenichi Higuchi, Mamoru Sawahashi (NTT DoCoMo) |
[more] | RCS2004-108 NS2004-72 pp.19-24 |
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