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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| WBS, ISEC, IT, RCC | 2025-03-05 10:40 |
Osaka | Nakanoshima Center, Osaka University (Osaka) | A Study on A New Framework for 3D Wireless Localization based on Super MDS with Quaternion Keigo Masuoka, Takumi Takahashi (Osaka Univ), Giuseppe Abreu (CU), Hideki Ochiai (Osaka Univ) |
[more] | |
| RCS, SR, SRW (Joint) |
2025-03-07 15:15 |
Kyoto | Kyoto Institute of Technology (Kyoto, Online) (Primary: On-site, Secondary: Online) |
[Invited Talk]
Vector Similarity Search-Based MCS Selection for Massive Multi-User MIMO Systems Takumi Takahashi (Osaka Univ.), Shinsuke Ibi (Doshisha Univ.), Hideki Ochiai (Osaka Univ.), Kazushi Muraoka, Takanobu Doi (NEC) |
[more] | |
| WBS, ITS, RCC | 2024-12-04 15:40 |
Kagoshima | Kagoshima Prefectural Culture Center (Kagoshima, Online) (Primary: On-site, Secondary: Online) |
A Systematic Constellation Shaping Design for Rate-Adaptive BICM Systems Based on Nonuniform QAM Eito Kurihara (YNU), Hideki Ochiai (OU)  WBS2024-40 ITS2024-21 RCC2024-45 |
In this work, we propose a systematic shaping design based on nonuniform quadrature amplitude modulation~(NU-QAM) conste... [more] | WBS2024-40 ITS2024-21 RCC2024-45 pp.46-51 |
| WBS, ITS, RCC | 2024-12-04 16:55 |
Kagoshima | Kagoshima Prefectural Culture Center (Kagoshima, Online) (Primary: On-site, Secondary: Online) |
A Study on Polar Codes Design Effective for Successive Cancellation List Decoding Hidetake Matsui (Yokohama National Univ.), Hideki Ochiai (Osaka Univ.) WBS2024-43 ITS2024-24 RCC2024-48 |
Polar codes are one of the error correcting codes to achieve channel capacity, and the most basic decoding method is Suc... [more] | WBS2024-43 ITS2024-24 RCC2024-48 pp.64-69 |
| MIKA (3rd) |
2024-10-28 15:40 |
Okayama | Okayama Convention Center (Okayama) | [Poster Presentation]
A Study on Expectation Propagation-Based IDD for Coded MIMO Systems with High-Order Modulation Fuga Kobayashi, Takumi Takahashi (Osaka Univ.), Shinsuke Ibi (Doshisha Univ.), Hideki Ochiai (Osaka Univ.) |
Iterative detection and decoding (IDD), which gradually improve detection accuracy by exchanging extrinsic value between... [more] | |
| MIKA (3rd) |
2024-10-29 14:35 |
Okayama | Okayama Convention Center (Okayama) | [Poster Presentation]
A Study on Performance Comparison of Spatial Multiplexing and Spatial Modulation When Using Suboptimal Demodulation Keigo Masuoka, Takumi Takahashi (Osaka Univ.), Shinsuke Ibi (Doshisha Univ.), Hideki Ochiai (Osaka Univ.) |
Spatial modulation (SM) is one type of index modulation (IM), and which assigns additional information bits to the selec... [more] | |
| MIKA (3rd) |
2024-10-29 14:35 |
Okayama | Okayama Convention Center (Okayama) | [Poster Presentation]
A Comparative Study on Suppression Mechanism of Self-Noise Propagation in Gaussian Belief Propagation and Expectation Propagation Tomoharu Furudoi, Takumi Takahashi (Osaka Univ.), Shinsuke Ibi (Doshisha Univ.), Hideki Ochiai (Osaka Univ.) |
This presentation comparatively examines the structural differences in the suppression mechanism of self-noise propagati... [more] | |
| RCC, RCS, SeMI, NS, SR, RISING (Joint) |
2024-07-17 14:40 |
Hokkaido | Hokkaido Citizens Activities Promotion Center (Hokkaido, Online) (Primary: On-site, Secondary: Online) |
[Invited Talk]
On the Tradeoff between Spectral Efficiency and Power Efficiency in Wireless Communications Systems Hideki Ochiai (Osaka Univ.) RCC2024-21 NS2024-44 RCS2024-90 SR2024-32 SeMI2024-18 |
[more] | RCC2024-21 NS2024-44 RCS2024-90 SR2024-32 SeMI2024-18 pp.20-22(RCC), pp.20-22(NS), pp.25-27(RCS), pp.37-39(SR), pp.26-28(SeMI) |
| RCS | 2024-06-20 10:00 |
Okinawa | (Okinawa, Online) (Primary: On-site, Secondary: Online) |
A Study on Precoder Design in Time-Varying mmWave MIMO Detection Based on Expectation Propagation Tomoharu Furudoi, Takumi Takahashi (Osaka Univ.), Shinsuke Ibi (Doshisha Univ.), Hideki Ochiai (Osaka Univ.) RCS2024-55 |
In this paper, we propose a novel precoder design for time-varying millimeter-wave (mmWave) multi-input multi-output (MI... [more] | RCS2024-55 pp.162-167 |
| RCS | 2024-06-20 10:10 |
Okinawa | (Okinawa, Online) (Primary: On-site, Secondary: Online) |
A Study on Mutual Information Prediction after Iterative Signal Detection for MCS Selection in Massive Multi-User MIMO-OFDM Fuga Kobayashi, Takumi Takahashi (Osaka Univ.), Sinsuke Ibi (Doshisha Univ.), Kazushi Muraoka, Takanobu Doi, Naoto Ishii (NEC), Hideki Ochiai (Osaka Univ.) RCS2024-56 |
To maximize spectral efficiency in the uplink of a massive multi-user multi-input multi-output orthogonal frequency-divi... [more] | RCS2024-56 pp.168-173 |
| RCS | 2024-06-20 10:20 |
Okinawa | (Okinawa, Online) (Primary: On-site, Secondary: Online) |
A Study on Low-Complexity LLR Calculation Based on Bilinear Inference for Millimeter-Wave MIMO Systems Using DA-QSM Keigo Masuoka, Takumi Takahashi (Osaka Univ.), Shinkuke Ibi (Doshisha Univ.), Hideki Ochiai (Osaka Univ.) RCS2024-57 |
When spatial multiplexing is used in millimeter-wave (mmWave) multi-input multi-output (MIMO) communications, strong spa... [more] | RCS2024-57 pp.174-179 |
| RCS | 2024-06-20 16:30 |
Okinawa | (Okinawa, Online) (Primary: On-site, Secondary: Online) |
A Study on Sparse Bayesian Learning Using Complex t-Prior for Beam-domain Channel Estimation in Massive Multi-User MIMO Kengo Furuta, Takumi Takahashi, Hideki Ochiai (Osaka Univ.) RCS2024-67 |
In this paper, we propose a novel beam-domain channel estimation (CE) algorithm based on sparse Bayesian learning (SBL) ... [more] | RCS2024-67 pp.235-240 |
| RCC, ISEC, IT, WBS | 2024-03-13 - 2024-03-14 |
Osaka | Osaka Univ. (Suita Campus) (Osaka) | Performance Evaluation of OFDM Systems with Clipping and Partial Filtering Wataru Hatano, Hideki Ochiai (YNU) IT2023-123 ISEC2023-122 WBS2023-111 RCC2023-105 |
[more] | IT2023-123 ISEC2023-122 WBS2023-111 RCC2023-105 pp.300-305 |
| RCC, ISEC, IT, WBS | 2024-03-13 - 2024-03-14 |
Osaka | Osaka Univ. (Suita Campus) (Osaka) | Secure Design of Channel Oriented Polar-Coded OFDM System over Frequency Selective Fading Channels Yuki Kuraya, Hideki Ochiai (YNU) IT2023-124 ISEC2023-123 WBS2023-112 RCC2023-106 |
We introduce a physical layer security scheme based on a polar-coded OFDM system in wireless communication. Our approach... [more] | IT2023-124 ISEC2023-123 WBS2023-112 RCC2023-106 pp.306-311 |
| RCC, ISEC, IT, WBS | 2024-03-13 - 2024-03-14 |
Osaka | Osaka Univ. (Suita Campus) (Osaka) | A Study on Polar Codes Design with Robustness against Channel SNR Fluctuation Hidetake Matsui, Hideki Ochiai (YNU) IT2023-102 ISEC2023-101 WBS2023-90 RCC2023-84 |
Polar codes are known to achieve high reliability with low decoding complexity. The design of polar codes requires the s... [more] | IT2023-102 ISEC2023-101 WBS2023-90 RCC2023-84 pp.179-184 |
| RCS, SAT (Joint) |
2023-09-01 13:40 |
Nagano | Naganoken Nokyo Building, and online (Nagano, Online) (Primary: On-site, Secondary: Online) |
Signal design of polar coded downlink NOMA satellite communication considering PAPR constraints Keita Ito, Yuto Hama, Hideki Ochiai (YNU) RCS2023-122 |
Non-terrestrial network(NTN), consisting of high altitude platform station(HAPS) along with conventional geostationary s... [more] | RCS2023-122 pp.101-106 |
| RCC, ISEC, IT, WBS | 2023-03-14 14:55 |
Yamaguchi | (Yamaguchi, Online) (Primary: On-site, Secondary: Online) |
A Study on Security Gap-Based Design of Polar Codes Hidetake Matsui, Toshiki Matsumine, Hideki Ochiai (Yokohama National Univ.) IT2022-84 ISEC2022-63 WBS2022-81 RCC2022-81 |
[more] | IT2022-84 ISEC2022-63 WBS2022-81 RCC2022-81 pp.103-108 |
| RCC, ISEC, IT, WBS | 2023-03-15 09:30 |
Yamaguchi | (Yamaguchi, Online) (Primary: On-site, Secondary: Online) |
A Study on Systematic Design of Geometric Shaping for BICM Systems Eito Kurihara, Hideki Ochiai (YNU) IT2022-117 ISEC2022-96 WBS2022-114 RCC2022-114 |
In this report, we investigate the application of geometric constellation shaping for standard BICM systems employing Gr... [more] | IT2022-117 ISEC2022-96 WBS2022-114 RCC2022-114 pp.313-318 |
| RCC, ITS, WBS | 2022-12-13 14:05 |
Shiga | Ritsumeikan Univ. BKC (Shiga, Online) (Primary: On-site, Secondary: Online) |
* Masayuki Kaneko, Hideki Ochiai (YNU) WBS2022-36 ITS2022-12 RCC2022-36 |
We investigate low-complexity construction schemes for polar coded bit-interleaved coded modulation~(BICM) system ove... [more] |
WBS2022-36 ITS2022-12 RCC2022-36 pp.13-18 |
| RCC, ITS, WBS | 2022-12-13 16:45 |
Shiga | Ritsumeikan Univ. BKC (Shiga, Online) (Primary: On-site, Secondary: Online) |
On Low-Complexity Construction of Polar-Coded OFDM System Over Frequency-Selective Fading Channels Yuki Kuraya, Hideki Ochiai (Yokohama National Univ.) WBS2022-41 ITS2022-17 RCC2022-41 |
We focus on design of polar codes with OFDM transmission over frequency-selective fading channels. In particular, we in... [more] |
WBS2022-41 ITS2022-17 RCC2022-41 pp.36-41 |
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