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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 120  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
RCS 2021-06-25
13:10
Okinawa University of The Ryukyus, Online
(Primary: On-site, Secondary: Online)
Expectation-Maximization Multiple Measurement Vector Approximate Message Passing
Takanori Hara, Koji Ishibashi (The Univ. of Electro-Communications)
 [more]
RCS 2021-06-25
13:35
Okinawa University of The Ryukyus, Online
(Primary: On-site, Secondary: Online)
Tensor-aided Beamforming Design for Full Duplex Cell-Free MIMO
Kengo Ando (UEC), Hiroki Iimori (JUB), Koji Ishibashi (UEC), Giuseppe Abreu (JUB)
 [more]
RCS, SR, SRW
(Joint)
2021-03-05
10:55
Online Online Beamforming Design for Heterogeneous Wireless Systems with Coded-Caching
Ayaka Urabe, Koji Ishibashi (UEC) RCS2020-256
In this paper, we propose a transmission beamforming design for the multiple input single output (MISO) system consistin... [more] RCS2020-256
pp.246-251
RCS, SR, SRW
(Joint)
2021-03-05
11:20
Online Online Tensor-aided Beamforming Design for Cell-Free MIMO
Kengo Ando (UEC), Hiroki Iimori, Giuseppe Abreu (JUB), Koji Ishibashi (UEC) RCS2020-257
In this paper, we investigate a transmit (TX) and receive (RX) beamforming (BF) design for cell free multiple input mult... [more] RCS2020-257
pp.252-257
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
NS, RCS
(Joint)
2020-12-17
11:50
Online Online Improvement of EVM for Downlink NOMA with Blind Nonlinear Compensation Scheme in Frequency Selective Channel
Jun Nagai, Yasushi Yamao, Koji Ishibashi (Univ. of Electro-Communications) RCS2020-136
In 5th generation mobile communication system (5G) and beyond, non-orthogonal multiple access (NOMA) has been studied to... [more] RCS2020-136
pp.13-18
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
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