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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| CCS, IN (Joint) |
2023-08-04 10:12 |
Hokkaido | Banya-no-yu | Optimal Power Levels in Grant-Free Power-Domain NOMA for mMTC Takeshi Hirai, Rei Oda, Naoki Wakamiya (Osaka Univ.)  IN2023-27 |
This paper optimizes the number of power levels in grant-free power-domain NOMA (GF-NOMA) for massive machine-type commu... [more] | IN2023-27 pp.58-63 |
| SeMI, RCS, RCC, NS, SR (Joint) |
2023-07-12 10:50 |
Osaka | Osaka University Nakanoshima Center + Online (Primary: On-site, Secondary: Online) |
Throughput Maximization of Semi-Grant-Free PD-NOMA for mMTC Takeshi Hirai, Lu Chen, Naoki Wakamiya (Osaka Univ.) SeMI2023-23 |
This paper maximizes the throughput of the semi-grant-free power-domain non-orthogonal multiple access (SGF-NOMA) for th... [more] | SeMI2023-23 pp.13-18 |
| RCS | 2023-06-14 17:30 |
Hokkaido | Hokkaido University, and online (Primary: On-site, Secondary: Online) |
Bayesian Receiver Design for Grant-Free NOMA Based on Low-Density Structured OFDM Kohei Ueda (UEC), Takanori Hara (Tokyo Univ. of Science), Koji Ishibashi (UEC) RCS2023-45 |
This paper studies a grant-free non-orthogonal multiple access (GF-NOMA) system using orthogonal frequency division mult... [more] | RCS2023-45 pp.99-104 |
| RCS | 2023-06-15 14:30 |
Hokkaido | Hokkaido University, and online (Primary: On-site, Secondary: Online) |
[Invited Talk]
New Research Trends Toward 6G Koji Ishibashi (UEC) RCS2023-58 |
There is a global surge in research and development efforts aimed at advancing the sixth-generation mobile communication... [more] | RCS2023-58 p.181 |
| RCS, IN, NV (Joint) |
2023-05-25 11:55 |
Kanagawa | Keio University (Hiyoshi Campus), and online (Primary: On-site, Secondary: Online) |
Blind Active User Detection for Grant-Free Access in the Presence of Timing Offsets Takanori Hara (Tokyo Univ. of Science) RCS2023-18 |
To accommodate a large number of users efficiently, grant-free non-orthogonal multiple access (GF-NOMA) has gained much ... [more] | RCS2023-18 pp.23-28 |
| CCS | 2023-03-26 15:10 |
Hokkaido | RUSUTSU RESORT | Performance Evaluations of Self-organized Power Selection in GF-NOMA for mMTC Unider Limited Transmission Power Rei Oda, Takeshi Hirai, Naoki Wakamiya (Osaka Univ.) CCS2022-76 |
This paper evaluates the throughput of the self-organized power selection method in the grant-free power domain non-orth... [more] | CCS2022-76 pp.75-80 |
| SeMI, SeMI (Joint) |
2023-01-19 13:10 |
Tokushima | Naruto grand hotel (Primary: On-site, Secondary: Online) |
[Short Paper]
Throughput Analysis in GF-NOMA with Inter-Cell Interference for mMTC Rei Oda, Takeshi Hirai (Osaka Univ.), Shigeo Shioda (Chiba Univ.), Naoki Wakamiya (Osaka Univ.) SeMI2022-71 |
This paper presents throughput in grant-free non-orthogonal multiple access (GF-NOMA) for massive machine-type communica... [more] | SeMI2022-71 pp.3-8 |
| RCS, NS (Joint) |
2022-12-15 16:35 |
Aichi | Nagoya Institute of Technology, and Online (Primary: On-site, Secondary: Online) |
Blind Multiple Measurement Vector Approximate Message Passing for Grant-Free Access Takanori Hara (Tokyo Univ. of Science), Koji Ishibashi (The Univ. of Electro-Communications) RCS2022-197 |
To accommodate a large number of users efficiently, grant-free non-orthogonal multiple access (GF-NOMA) has gained much ... [more] | RCS2022-197 pp.63-68 |
| SIP | 2022-08-25 16:30 |
Okinawa | Nobumoto Ohama Memorial Hall (Ishigaki Island) (Primary: On-site, Secondary: Online) |
[Invited Talk]
Approximate Message Passing for Efficient Grant-Free Access Takanori Hara (Tokyo Univ. of Science) SIP2022-59 |
To accommodate a large number of users efficiently, grant-free non-orthogonal multiple access has gained much attention.... [more] | SIP2022-59 pp.50-55 |
| RCS | 2022-06-16 10:10 |
Okinawa | University of the Ryukyus, Senbaru Campus and online (Primary: On-site, Secondary: Online) |
Iterative Active User Detection for Grant-Free Non-Orthogonal Multiple Access in The Presence of Carrier Frequency Offsets Kohei Ueda (UEC), Takanori Hara (TUS), Koji Ishibashi (UEC) RCS2022-43 |
Grant-free non-orthogonal multiple access (GF-NOMA) systems suffer from the performance degradation of active user detec... [more] | RCS2022-43 pp.114-119 |
| CAS, CS | 2022-03-04 16:25 |
Online | Online | Robustness of Distributed Power Control for GF-NOMA in mMTC Rei Oda, Takeshi Hirai, Naoki Wakamiya (Osaka Univ.) CAS2021-100 CS2021-102 |
This paper investigates the robustness of our distributed power control method for the grant-free non-orthogonal multipl... [more] | CAS2021-100 CS2021-102 pp.141-146 |
| RCS, NS (Joint) |
2021-12-17 09:30 |
Nara | Nara-ken Bunka Kaikan and Online (Primary: On-site, Secondary: Online) |
Distributed Power Control based on Channel Gain for Grant-Free Non-Orthogonal Multiple Access in Massive Machine-Type Communications Rei Oda, Takeshi Hirai, Naoki Wakamiya (Osaka Univ.) NS2021-102 |
This paper investigates a distributed power control method based on channel gains for the grant-free non-orthogonal mult... [more] | NS2021-102 pp.29-34 |
| RCS | 2021-06-25 13:10 |
Online | Online | Multiple Measurement Vector Approximate Message Passing Without Prior Information of Channels for Grant-Free Non-Orthogonal Multiple Access Takanori Hara, Koji Ishibashi (The Univ. of Electro-Communications) RCS2021-71 |
To accommodate a large number of users efficiently, grant-free non-orthogonal multiple access (GF-NOMA) has gained much ... [more] | RCS2021-71 pp.243-248 |
| NS, RCS (Joint) |
2020-12-17 11:00 |
Online | Online | [Encouragement Talk]
Massive Grant-Free Non-Orthogonal Multiple Access Utilizing Time and Frequency Spreading Takanori Hara, Koji Ishibashi (The Univ. of Electro-Communications) RCS2020-134 |
To accommodate a large number of users efficiently, grant-free non-orthogonal multiple access (GF-NOMA) has gained much ... [more] | RCS2020-134 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 |
| 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 |
| 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 |
| 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 |
| 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 |
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