Committee |
Date Time |
Place |
Paper Title / Authors |
Abstract |
Paper # |
HCS |
2021-03-15 10:00 |
Online |
Online |
Predicting Smartphone Addiction Risks from Smartphone Usage Behavior in the COVID-19 Pandemic. Nao Kobayashi, Yuka Miyake, Yasuyuki Hatakawa (KDDI CORPORATION), Toshitaka Hamamura, Masaru Honjo (KDDI Research, Inc.), Taiki Oka, Toshinori Chiba (ATR) HCS2020-67 |
Amid the COVID-19 pandemic, people are becoming more and more dependent on smartphones.
As such dependence on smartphon... [more] |
HCS2020-67 pp.1-5 |
RCS, SR, SRW (Joint) |
2014-03-05 14:00 |
Tokyo |
Waseda Univ. |
A Pilot Contamination Averse Closed-Loop Scheme for TDD-Based Massive MIMO Systems Oussama Souihli, Yasuyuki Hatakawa, Satoshi Konishi (KDDI R&D Labs) RCS2013-384 |
TDD-based Massive MIMO systems rely on channel reciprocity assumption (i.e. that the downlink channel matrix can be infe... [more] |
RCS2013-384 pp.469-474 |
RCS, SR, SRW (Joint) |
2014-03-05 15:10 |
Tokyo |
Waseda Univ. |
Indoor Experiment using Multiuser-MIMO Testbed Yasuyuki Hatakawa, Masashi Fushiki, Satoshi Konishi (KDDI R&D Labs) RCS2013-387 |
[more] |
RCS2013-387 pp.487-492 |
RCS, SR, SRW (Joint) |
2014-03-05 15:30 |
Tokyo |
Waseda Univ. |
Outdoor experiment using multi-user MIMO testbed Masashi Fushiki, Yasuyuki Hatakawa, Satoshi Konishi (KDDI R&D Labs) RCS2013-388 |
This paper presents the experimental results using Multiuser-Multiple Input Multiple Output (MU-MIMO) testbed in the urb... [more] |
RCS2013-388 pp.493-498 |
RCS, SIP |
2014-01-23 14:40 |
Fukuoka |
Kyushu Univ. |
A HypothesisTesting Framework For Elevation Beamforming Oussama Souihli, Yasuyuki Hatakawa, Satoshi Konishi (KDDI R&D Labs) SIP2013-96 RCS2013-266 |
3D Beamforming (3D BF) is a new feature of 3GPP LTE-A standard that is likely to increase spectral efficiency by exploit... [more] |
SIP2013-96 RCS2013-266 pp.65-70 |
RCS, AP (Joint) |
2013-11-21 15:10 |
Shimane |
Matsue Terrsa |
[Invited Lecture]
Full-dimensional MIMO (FD-MIMO): Opportunities and Challenges Oussama Souihli, Yasuyuki Hatakawa, Satoshi Konishi (KDDI R&D Labs) AP2013-114 RCS2013-192 |
Full-Dimensional MIMO (FD MIMO), also known as Three-Dimensional MIMO (3D MIMO), is a new beamforming paradigm in cellul... [more] |
AP2013-114 RCS2013-192 p.85(AP), p.109(RCS) |
RCS |
2013-10-17 14:20 |
Tokyo |
Sophia Univ. |
[Invited Lecture]
Innovation of Wireless Access Technology Yasuyuki Hatakawa, Koichiro Kitagawa, Satoshi Konishi (KDDI R&D Labs.) RCS2013-152 |
[more] |
RCS2013-152 p.61 |
ASN, RCS, NS, SR (Joint) |
2013-07-19 13:30 |
Shizuoka |
Hamamatsu Act City |
[Invited Talk]
A Study on Applicability of Device-to-Device Communication to LTE-Advanced Cellular Communication Systems Koichiro Kitagawa, Yasuyuki Hatakawa, Satoshi Konishi (KDDI Labs.) RCS2013-118 |
In the 3rd Generation Partnership Project (3GPP), Device-to-Device (D2D) communication has been discussed as one of the ... [more] |
RCS2013-118 p.221 |
RCS |
2013-06-20 11:50 |
Hokkaido |
Hokkaido Univ. |
A Study on the Deployment of Device-to-Device Communication under LTE-Advanced networks Koichiro Kitagawa, Yasuyuki Hatakawa, Satoshi Konishi (KDDI Labs.) RCS2013-51 |
In 3GPP (The 3rd-Generation Partnership Project) standardization, it has been discussed to adopt Device-to-Device (D2D) ... [more] |
RCS2013-51 pp.85-90 |
RCS |
2013-06-20 12:10 |
Hokkaido |
Hokkaido Univ. |
Hardware Implementation of Interference Canceller for IDMA Wireless Systems Shingo Yoshizawa (Kitami Inst. of Tech.), Yasuyuki Hatakawa, Tomoko Matsumoto, Satoshi Konishi (KDDI), Yoshikazu Miyanaga (Hokkaido Univ.) RCS2013-52 |
Due to the increasing demand for machine-to-machine (M2M) communication, a wireless system which realizes simultaneous c... [more] |
RCS2013-52 pp.91-96 |
RCS, IN (Joint) |
2013-05-17 10:10 |
Tokyo |
Kikai-Shinko-Kaikan Bldg. |
Benefits of Channel Diagonal Dominance to Cooperative MIMO Systems Oussama Souihli, Yasuyuki Hatakawa, Satoshi Konishi (KDDI R&D Labs) RCS2013-31 |
In cooperative multiple-input multiple-output (MIMO) cellular systems, a primary base station (BS), typically serving th... [more] |
RCS2013-31 pp.49-54 |
RCS, SR, SRW (Joint) |
2013-02-27 09:40 |
Tokyo |
Waseda Univ. |
An LQ-Less Implementation of Tomlinson Harashima Precoding (THP) Oussama Souihli, Yasuyuki Hatakawa, Satoshi Konishi (KDDI R&D Labs) RCS2012-286 |
Dirty Paper Coding (DPC) is the best known interference cancellation strategy in wireless channels with additive interfe... [more] |
RCS2012-286 pp.13-18 |
RCS, SR, SRW (Joint) |
2013-02-27 10:30 |
Tokyo |
Waseda Univ. |
Hermitian Splitting Precoding (HSP) for Wireless MIMO Systems
-- All The Channel Capacity, Half The Signaling Cost -- Oussama Souihli, Yasuyuki Hatakawa, Satoshi Konishi (KDDI R&D Labs) RCS2012-288 |
In wireless MIMO systems, capacity-achieving precoding schemes, be they linear (e.g. Singular-Value-Decomposition (SVD) ... [more] |
RCS2012-288 pp.25-30 |
RCS, SR, SRW (Joint) |
2013-02-27 11:10 |
Tokyo |
Waseda Univ. |
Open-Loop Homographic Precoding (OLHP)
-- A Method for Seamless (Interference-Free) Multiuser Transmission in Wireless SISO/MIMO Systems With No Channel State Information At The Transmitter (CSIT) -- Oussama Souihli, Yasuyuki Hatakawa, Satoshi Konishi (KDDI R&D Labs) RCS2012-290 |
In linguistics, homographs are words of like spelling and different meanings. Thus, in English, the word "bear" could me... [more] |
RCS2012-290 pp.37-42 |
RCS, SR, SRW (Joint) |
2013-02-27 13:00 |
Tokyo |
Waseda Univ. |
Performance Evaluation of CSI Compression Scheme Using Multiuser MIMO Testbed Tomoko Matsumoto, Yasuyuki Hatakawa, Satoshi Konishi (KDDI Labs.) RCS2012-292 |
[more] |
RCS2012-292 pp.49-54 |
AP, RCS (Joint) |
2012-11-15 14:00 |
Tokyo |
Tokyo Denki University |
[Requested Talk] Development of Multiuser-MIMO Testbed with Limited CSI Feedback and Non-Linear Precoding Yasuyuki Hatakawa, Tomoko Matsumoto, Satoshi Konishi (KDDI) AP2012-100 RCS2012-167 |
[more] |
AP2012-100 RCS2012-167 pp.43-48(AP), pp.37-42(RCS) |
RCS |
2012-06-22 12:10 |
Hokkaido |
Hakodate City Central Library |
Proposal of Faster Method for MU-MIMO Precoding Using Fine-Graded Parallel Processing Kosuke Shimazaki (Hokkaido Univ.), Shingo Yoshizawa (KIT), Yasuyuki Hatakawa, Tomoko Matsumoto, Satoshi Konishi (KDDI), Yoshikazu Miyanaga (Hokkaido Univ.) RCS2012-65 |
This paper proposes a fast processing method for Tomlinson-Harashima Precoding (THP) circuit used for multi-user MIMO (M... [more] |
RCS2012-65 pp.129-134 |
SR, RCS, SRW (Joint) |
2012-03-08 11:15 |
Kanagawa |
YRP |
Performance Evaluation of IDMA for Small Packet Transmission Tomoko Matsumoto, Yasuyuki Hatakawa, Satoshi Konishi (KDDI Labs) RCS2011-342 |
[more] |
RCS2011-342 pp.157-162 |
AP, RCS (Joint) |
2011-11-17 10:35 |
Aichi |
Nagoya Congress Center |
A Proposal of Multi-user MIMO Scheduling Method with Low Complexity Kazuhide Toda, Yasuyuki Hatakawa, Tomoko Matsumoto, Satoshi Konishi (KDDI R&D Labs.) RCS2011-210 |
This paper proposes a scheduling method with low complexity for the downlink multi-user MIMO. The decision
of the numbe... [more] |
RCS2011-210 pp.127-132 |
RCS, AN, SR, USN (Joint) |
2011-10-28 15:05 |
Tokyo |
Sophia Univ. |
Proposal of Channel State Information Compression Scheme for Downlink Multi-user MIMO Yasuyuki Hatakawa, Tomoko Matsumoto, Satoshi Konishi (KDDI R&D Labs.) RCS2011-184 |
[more] |
RCS2011-184 pp.261-266 |