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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 112  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
IN, RCS, NV
(Joint)
2020-05-21
- 2020-05-22
Kanagawa Keio University A Study on Non-Orthogonal Pilot Design for Grant-Free Multi-User Massive MIMO
Takanori Hara, Koji Ishibashi (The Univ. of Electro-Communications) RCS2020-22
To accommodate a large number of users with low latency, grant-free access has gained much attention. As one of the conv... [more] RCS2020-22
pp.67-72
RCS 2020-04-23
- 2020-04-24
Online Hotel Beppu Hosenso Discreteness Aware Receiver Design and Antenna Configuration for Distributed MIMO
Kengo Ando (The Univ. Electro-Communications), Hiroki Iimori (JUB), Koji Ishibashi (The Univ. Electro-Communications), Giuseppe Abreu (JUB) RCS2020-7
In this paper, we investigate a receiver design for uplink distributed-MIMO networks composed of a common central base s... [more] RCS2020-7
pp.37-42
RCS 2020-04-23
- 2020-04-24
Online Hotel Beppu Hosenso Optimal Transmission Strategy Realizing Minimum Age-of-Information of Energy Harvesting Users over Multiple-Access Channels
Naoya Hirosawa (The Univ. Electro-Communications), Hiroki Iimori (JUB), Koji Ishibashi (The Univ. Electro-Communications), Giuseppe Abreu (JUB) RCS2020-8
In this paper, we study a sensor network composed of multiple energy harvesting nodes being capable of collecting energy... [more] RCS2020-8
pp.43-48
RCS 2020-04-23
- 2020-04-24
Online Hotel Beppu Hosenso Generalization of Performance Analysis on OFDM Pilot-Aided Ambient Backscatter Communications
Takanori Hara, Ryuhei Takahashi, Koji Ishibashi (The Univ. of Electro-Communications) RCS2020-9
As a promising scheme to transmit the information with ultra-low-power, ambient backscatter communication (AmBC) exploit... [more] RCS2020-9
pp.49-54
RCS, SR, SRW
(Joint)
2020-03-04
09:00
Tokyo Tokyo Institute of Technology R&D of Technology for High Reliability Management of Advanced 5G Network to Various Requirements of Communication Services
Takahide Murakami, Hiroyuki Shinbo, Yu Tsukamoto, Shinobu Nanba, Yoji Kishi (KDDI Research), Morihiko Tamai, Hiroyuki Yokoyama (ATR), Takanori Hara, Koji Ishibashi (The University of Electro-Communications), Kensuke Tsuda, Yoshimi Fujii (Kozo Keikaku Engineering Inc.), Fumiyuki Adachi, Keisuke Kasai, Masataka Nakazawa (Tohoku Univ.), Yuta Seki, Takayuki Sotoyama (Panasonic) RCS2019-320
As the 5th generation mobile communication system is widespread approximately 2025, more variety of communication qualit... [more] RCS2019-320
pp.1-6
RCS, SR, SRW
(Joint)
2020-03-04
10:55
Tokyo Tokyo Institute of Technology Transmission Efficiency of Uplink Grant-Free Non-Orthogonal Multiple Access
Takanori Hara, Koji Ishibashi (The Univ. of Electro-Communications) RCS2019-325
To accommodate a large number of users efficiently, grant-free non-orthogonal multiple access (GF-NOMA) has gained much ... [more] RCS2019-325
pp.31-36
SeMI, IPSJ-MBL, IPSJ-UBI 2020-03-02
13:50
Aichi Nagoya University (IB Building) Irregular Frameless ALOHA Based on Geometric Structure of Devices
Masaru Oinaga, Koji Ishibashi (UEC) SeMI2019-124
In the conventional frameless ALOHA scheme, the transmission probability is shared among all users. Furthermore, it is p... [more] SeMI2019-124
pp.65-70
IT, SIP, RCS 2020-01-24
15:50
Hiroshima Hiroshima City Youth Center [Encouragement Talk] Aggregate-Compression-Aided Subcarrier IQ Index Modulation With Discreteness-Aware Fast Iterative Shrinkage-Thresholding Algorithm
Kazuya Ohira, Koji Ishibashi (UEC) IT2019-83 SIP2019-96 RCS2019-313
 [more] IT2019-83 SIP2019-96 RCS2019-313
pp.279-284
IT, SIP, RCS 2020-01-24
16:40
Hiroshima Hiroshima City Youth Center Active User Detection for Uplink Grant-Free Non-Orthogonal Multiple Access in The Presence of Carrier Frequency Offsets
Takanori Hara, Koji Ishibashi (The Univ. of Electro-Communications) IT2019-89 SIP2019-102 RCS2019-319
Practically, it is significantly difficult to assume that carrier frequencies are ideally synchronized among users, and ... [more] IT2019-89 SIP2019-102 RCS2019-319
pp.313-317
ED, THz [detail] 2019-12-24
09:25
Miyagi   [Invited Talk] Terahertz-to-Infrared Flexible Scanner with Carbon Nanotube Films
Daichi Suzuki, Koji Ishibashi (RIKEN), Yukio Kawano (Tokyo Tech.) ED2019-87
(To be available after the conference date) [more] ED2019-87
pp.45-48
NS, RCS
(Joint)
2019-12-19
09:15
Tokushima Memorial Hall of Alumni(Engineering), Tokushima Univ. A Study on Active User Detection and Channel Estimation for Grant-Free Non-Orthogonal Multiple Access based on OFDM
Takanori Hara, Koji Ishibashi (The Univ. of Electro-Communications) RCS2019-237
As a scheme to accommodate a large number of users efficiently, the grant-free non-orthogonal multiple access (GF-NOMA) ... [more] RCS2019-237
pp.1-5
AP, RCS
(Joint)
2019-11-20
13:35
Saga Saga Univ. A Study on Low-Complexity Data Detection for Grant-Free Non-Orthogonal Multiple Access
Takanori Hara, Koji Ishibashi (The Univ. of Electro-Communications) RCS2019-211
As a scheme to accommodate a large number of users efficiently, the grant-free non-orthogonal multiple access (GF-NOMA) ... [more] RCS2019-211
pp.49-54
SR 2019-11-05
10:50
Overseas Rutgers University Inn & Conference Center, NJ, USA [Poster Presentation] Received-Power-Aware Frameless ALOHA for Non-Orthogonal Multiple Access
Masaru Oinaga, Shun Ogata, Koji Ishibashi (UEC) SR2019-84
In a system such as mMTC (massive Machine Type Communication), the network is typically uplink-dominant, where the numbe... [more] SR2019-84
p.51
RCS 2019-10-24
09:55
Kanagawa Yokosuka Research Park Theoretical Analysis on Grant-Free Non-Orthogonal Multiple Access Using Vector Approximate Message Passing
Takanori Hara, Koji Ishibashi (The Univ. of Electro-Communications) RCS2019-179
As a scheme to accommodate a large number of users efficiently, the grant-free non-orthogonal multiple
access (GF-NOMA)... [more]
RCS2019-179
pp.7-12
MIKA
(2nd)
2019-10-04
11:15
Hokkaido Hokkaido Univ. [Invited Lecture] Grant-Free Non-Orthogonal Multiple Access: Random Access in An Era of Internet-of-Things
Koji Ishibashi (Univ. of Electro-Communications)
 [more]
RCS, SAT
(Joint)
2019-08-22
09:50
Aichi Nagoya University Generalized Boosted Approximate Message Passing for Uplink Grant-Free Non-Orthogonal Multiple Access
Takanori Hara, Koji Ishibashi (The Univ. of Electro-Communications) RCS2019-148
In this paper, we propose low complexity active user detection (AUD), channel estimation (CE), and multiuser detection (... [more] RCS2019-148
pp.13-18
SeMI, RCS, NS, SR, RCC
(Joint)
2019-07-10
15:45
Osaka I-Site Nanba(Osaka) Robust Transmit Beamforming Design via Fractional Programming for Downlink Power-Domain NOMA Systems
Hiroki Iimori, Koji Ishibashi (UEC), Giuseppe Abreu (JUB) RCC2019-16 NS2019-49 RCS2019-106 SR2019-25 SeMI2019-25
Taking into account imperfect channel state information, we study a robust transmit beamforming design for downlink powe... [more] RCC2019-16 NS2019-49 RCS2019-106 SR2019-25 SeMI2019-25
pp.27-32(RCC), pp.37-42(NS), pp.31-36(RCS), pp.37-42(SR), pp.41-46(SeMI)
SeMI, RCS, NS, SR, RCC
(Joint)
2019-07-10
16:10
Osaka I-Site Nanba(Osaka) Boosted Approximate Message Passing for Uplink Grant-Free Non-Orthogonal Multiple Access
Takanori Hara, Koji Ishibashi (The Univ. of Electro-Communications) RCC2019-17 NS2019-50 RCS2019-107 SR2019-26 SeMI2019-26
In this paper, we propose low complexity active user detection (AUD), channel estimation (CE), and multiuser detection (... [more] RCC2019-17 NS2019-50 RCS2019-107 SR2019-26 SeMI2019-26
pp.33-38(RCC), pp.43-48(NS), pp.37-42(RCS), pp.43-48(SR), pp.47-52(SeMI)
RCS 2019-06-21
10:20
Okinawa Miyakojima Hirara Port Terminal Building A Study on Energy-Efficient Design of Irregular Repetition Slotted ALOHA with Stochastic Power Control
Ryo Okabe, Masaru Oinaga, Shun Ogata, Koji Ishibashi (The Univ. of Electro-Communications) RCS2019-87
Irregular repetition slotted ALOHA based on non-orthogonal multiple acces (IRSA-NOMA) utilizes stochastic power control ... [more] RCS2019-87
pp.291-296
RCS 2019-06-21
10:30
Okinawa Miyakojima Hirara Port Terminal Building A Study on Age-of-Information Minimization in Two-User Multiple Access Channel with Energy Harvesting
Naoya Hirosawa, Koji Ishibashi (The Univ. of Electro-Communications) RCS2019-88
In this paper, two-user multiple access channel is investigated where users, namely sensor nodes (SNs), transmit their d... [more] RCS2019-88
pp.297-302
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