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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| NS, RCS (Joint) |
2020-12-18 15:00 |
Online | Online | Dynamic TDD Allocation via Fractional Programming for Cell-Free Massive MIMO Systems Shuto Fukue (UEC), Hiroki Iimori, Giuseppe Abreu (Jacobs Univ. Bremen), Koji Ishibashi (UEC)  RCS2020-151 |
In this paper, we consider a user-centric spacial resource management problem for cell-free massive MIMO architectures w... [more] | RCS2020-151 pp.91-96 |
| SAT, RCS (Joint) |
2020-08-21 09:50 |
Online | Online | A Study on Robust Beamforming Design for Millimeter-Wave Communications with Stochastic Blockages Ryo Okabe (The Univ. of Electro-Communications), Hiroki Iimori (JUB), Koji Ishibashi (The Univ. of Electro-Communications) RCS2020-84 |
[more] | RCS2020-84 pp.29-34 |
| IN, RCS, NV (Joint) |
2020-05-21 - 2020-05-22 |
Online | Online | 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 | Online | 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 | Online | 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 | Online | 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 (Cancelled but technical report was issued) |
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 (Cancelled but technical report was issued) |
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 |
Online | Online | 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 | 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) |
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