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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 139  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
RCS, AP, UWT
(Joint)
2022-11-16
09:55
Fukuoka Kyushu University, and Online
(Primary: On-site, Secondary: Online)
A Study on Mitigating Inter-UE Interference in Cell-Free Massive MIMO Systems with Network Full-Duplex
Shuto Fukue (UEC), Giuseppe Abreu (JUB), Koji Ishibashi (UEC)
 [more]
SAT, RCS
(Joint)
2022-08-26
10:15
Hokkaido
(Primary: On-site, Secondary: Online)
Design of Coordinated Multi-Point Beamforming for Millimeter-Wave OFDM With Random Blockage
Sota Uchimura, Hiroki Iimori (UEC), Giuseppe Abreu (JUB), Koji Ishibashi (UEC) RCS2022-121
This paper studies the beamforming design of coordinated multi-point (CoMP) using orthogonal frequency division multiple... [more] RCS2022-121
pp.138-143
RCS 2022-06-16
10:00
Okinawa University of the Ryukyus, Senbaru Campus and online
(Primary: On-site, Secondary: Online)
Secure Precoded OFDM Transmission Using Randomized Unitary Matrix
Naoki Isono, Kengo Ando, Koji Ishibashi (UEC) RCS2022-42
This paper considers a network consisting of a base station (BS), a legitimate user equipment (UE), and an eavesdropper ... [more] RCS2022-42
pp.108-113
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
IT, EMM 2022-05-17
13:50
Gifu Gifu University
(Primary: On-site, Secondary: Online)
Extensible Polarization-Adjusted Convolutional Codes and Its Application to Rateless Codes
Yachongka Vamoua, Michitaka Kurosu, Mizuho Asahi, Hideki Yagi, Koji Ishibashi (UEC) IT2022-3 EMM2022-3
Rateless codes have been proposed to realize efficient communications when the channel state information is not availabl... [more] IT2022-3 EMM2022-3
pp.13-18
SR 2022-01-24
10:50
Online Online [Invited Talk] Research & Development of Robust CoMP for Millimeter Communications with Random Blockages
Koji Ishibashi, Sota Uchimura (UEC), Tetsuya Iye, Yoshimi Fujii (KKE), Takahide Murakami, Hiroyuki Shinbo (KDDI Research, Inc.) SR2021-60
Next-generation mobile communications (Beyond 5G/6G) have to meet diverse demands of users such as ultra-high speed, low... [more] SR2021-60
p.11
RCS, SIP, IT 2022-01-20
10:55
Online Online Design of Coded Caching for Multi-User MISO Channels with Heterogeneous Cache Sizes
Ayaka Urabe, Koji Ishibashi (UEC), MohammadJavad Salehi, Antti Tolli (Univ. Oulu) IT2021-38 SIP2021-46 RCS2021-206
This paper focuses on coded caching when every user has a different memory size for caching and studies the design over ... [more] IT2021-38 SIP2021-46 RCS2021-206
pp.57-62
RCS, NS
(Joint)
2021-12-16
10:35
Nara Nara-ken Bunka Kaikan and Online
(Primary: On-site, Secondary: Online)
Highly efficient multi-hop transmission using encryption-then-compression based on CRC-aided Polar code
Ryota Yatsu, Koji Ishibashi (UEC), Hideki Endo, Sota Tsuchiya (Tokyo Gas) RCS2021-175
Packet aggregation with compression has been proposed as one of the methods in order to reduce the transmission time, wh... [more] RCS2021-175
pp.1-6
MIKA
(3rd)
2021-10-29
13:00
Okinawa
(Primary: On-site, Secondary: Online)
[Tutorial Lecture]
Koji Ishibashi (UEC)
 [more]
RCS 2021-10-21
10:25
Online Online Performance Evaluation of Scalable Cell-Free Massive MIMO Systems with Multiple CPUs Subject to Backhaul Capacity Limitation
Masaaki Ito, Issei Kanno, Kosuke Yamazaki (KDDI Research), Kengo Ando, Shuto Fukue (UEC), Hiroki Iimori (JUB), Koji Ishibashi (UEC) RCS2021-119
Cell-free massive multiple-input multiple-output (CF-mMIMO) systems have attracted attention worldwide, being considered... [more] RCS2021-119
pp.7-12
RCS 2021-10-21
10:50
Online Online Beamforming Design and Secrecy capacity analysis for Cell-Free massive MIMO
Kengo Ando (UEC), Hiroki Iimori, Giuseppe Abreu (JUB), Koji Ishibashi (UEC) RCS2021-120
In this paper, we investigate a secure beamforming (BF) design for cell-free massive multiple input mul tiple output (CF... [more] RCS2021-120
pp.13-18
RCS 2021-10-21
11:15
Online Online A Study on Resource Allocation and Beamforming Design via Geometric Mean Maximization for Cell-free Massive MIMO Systems with Dynamic TDD
Shuto Fukue (UEC), Hiroki Iimori, Giuseppe Abreu (JUB), Koji Ishibashi (UEC) RCS2021-121
In this paper, we consider a cell-free multiple-input multiple-output (MIMO) systems operated in a dynamic time division... [more] RCS2021-121
pp.19-24
RCS 2021-10-21
16:00
Online Online [Poster Presentation] A Study on Bayesian Receiver Design via Bilinear Inference for Scalable Cell-Free Massive MIMO
Takumi Takahashi (Osaka Univ.), Hiroki Iimori (JUB), Kengo Ando, Koji Ishibashi (UEC), Shinsuke Ibi (Doshisha Univ), Giuseppe Abreu (JUB) RCS2021-129
One of the main challenges in realizing uplink scalable cell-free massive multi-input multi-output (CF-mMIMO) is capacit... [more] RCS2021-129
pp.57-62
RCS 2021-10-22
10:50
Online Online Experimental Study on Tradeoff between Blockage Prediction and Performance of Millimeter-wave Communications with Coordinated Multipoint Transmission
Sota Uchimura (UEC), Hiroki Iimori (JUB), Koji Ishibashi (UEC), Takahide Murakami, Hiroyuki Shinbo (KDDI Research, Inc.) RCS2021-133
Various blockage prediction methods have been proposed to overcome the vulnerability of millimeter-wave (mmWave) signals... [more] RCS2021-133
pp.76-81
RCS 2021-10-22
13:00
Online Online Signal Design for Two-Dimensional OTFS Index Modulation Over Doubly-Selective Channels With Fractional Doppler
Kazuya Ohira, Koji Ishibashi (UEC) RCS2021-135
 [more] RCS2021-135
pp.88-93
RCS, SAT
(Joint)
2021-08-27
14:30
Online Online Antenna Configuration and Robust Receiver Design for Scalable Cell-Free Massive MIMO with Capacity Limited Fronthaul
Kengo Ando (UEC), Hiroki Iimori, Giuseppe Abreu (JUB), Takumi Takahashi (Osaka Univ), Koji Ishibashi (UEC) RCS2021-114
In this paper, we investigate an uplink signal detection problem in scalable cell-free massive multiple input multiple o... [more] RCS2021-114
pp.79-84
RCS, SAT
(Joint)
2021-08-27
14:55
Online Online Resource Allocation and Beamforming Design Considering User Fairness for Cell-Free Massive MIMO System with Dynamic TDD
Shuto Fukue (UEC), Hiroki Iimori, Giuseppe Abreu (JUB), Koji Ishibashi (UEC) RCS2021-115
In this paper, we consider a cell-free massive multiple-input multiple-output (MIMO) system, in which uplink and downlin... [more] RCS2021-115
pp.85-90
RCS, SAT
(Joint)
2021-08-27
15:20
Online Online Low-Complexity Robust Beamforming Design for Millimeter-Wave Communications with Random Blockage
Sota Uchimura (UEC), Hiroki Iimori, Giuseppe Abreu (JUB), Koji Ishibashi (UEC) RCS2021-116
In this paper, we propose a low-complexity beamforming algorithm for coordinated multi-point (CoMP) millimeter-wave wire... [more] RCS2021-116
pp.91-96
RCS, SAT
(Joint)
2021-08-27
15:45
Online Online Low Latency Beam-Sweeping for Millimeter-Wave Partially Connected Arrays
Andre Saito Guerreiro (UEC), Hiroki Iimori (JUB), Koji Ishibashi (UEC) RCS2021-117
Millimeter-wave communication has been widely studied due to its potential to attain higher data rates by providing a si... [more] RCS2021-117
pp.97-102
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
 Results 1 - 20 of 139  /  [Next]  
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