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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| RCS | 2024-04-26 09:30 |
Hiroshima | (Primary: On-site, Secondary: Online) |
Performance Comparison of Null-Space Expansion in Low Computation Block Diagonalization-based Multi-User Massive MIMO Yuki Sasaki (Tokyo Univ, of Science), Kabuto Arai (The Univ. of Electro-Communications), Kazuki Maruta (Tokyo Univ, of Science)  RCS2024-6 |
This paper proposes a novel precoding weight design that enhances interference suppression performance with low computat... [more] | RCS2024-6 pp.26-31 |
| RCS | 2024-04-26 09:55 |
Hiroshima | (Primary: On-site, Secondary: Online) |
Performance Improvement by Dimensionality Reduction of Interference Subspace on One-Shot Null-Space Expansion for Massive MIMO Soya Nakamura, Yuki Sasaki, Kazuki Maruta (Tokyo Univ. of Science) RCS2024-7 |
Massive MIMO Null Space Expansion (NSE) is effective multiuser precoding scheme in time-varying channels，taking advantag... [more] | RCS2024-7 pp.32-37 |
| COMP | 2023-10-24 16:55 |
Aichi | Nagoya Univ. Venture Business Lab. | On Space Complexity of Generating a Tent Code Naoaki Okada (Kyushu Univ.), Shuji Kijima (Shiga Univ.) COMP2023-15 |
This paper is motivated by a question whether it is possible to calculate a chaotic sequence efficiently, e.g., is it po... [more] | COMP2023-15 pp.21-23 |
| MIKA (3rd) |
2023-10-11 14:30 |
Okinawa | Okinawa Jichikaikan (Primary: On-site, Secondary: Online) |
[Poster Presentation]
Dimensionality reduction of interference subspace on one-shot null-space expansion for massive MIMO Soya Nakamura, Yuki Sasaki, Maruta Kazuki (Tokyo Univ.Science) |
Massive MIMO Null Space Expansion (NSE) is effective multiuser precoding scheme in time-varying channels，taking advantag... [more] | |
| RCS, SAT (Joint) |
2023-08-31 11:20 |
Nagano | Naganoken Nokyo Building, and online (Primary: On-site, Secondary: Online) |
Null Spatial Expansion for Low-Complexity Block Diagonalization-based Multiuser Massive MIMO Yuki Sasaki, Kazuki Maruta (Tokyo Univ. of Science), Kabuto Arai (UEC) RCS2023-103 |
This paper proposes a new block diagonalization (BD)-based null-space expansion for multiuser Massive MIMO which offers ... [more] | RCS2023-103 pp.9-14 |
| SeMI, RCS, RCC, NS, SR (Joint) |
2023-07-13 13:25 |
Osaka | Osaka University Nakanoshima Center + Online (Primary: On-site, Secondary: Online) |
Peak Cancellation Signal-Based PAPR Reduction Method Using Null Space in MIMO Channel for MIMO-OFDM Signals under Frequency-Selective Fading Channel Jun Saito, Kenichi Higuchi (Tokyo Univ. of Science) RCS2023-92 |
In this paper, we propose a parallel peak cancellation (PC) method in the peak-to-average power ratio (PAPR) reduction u... [more] | RCS2023-92 pp.64-69 |
| AP | 2023-03-17 13:35 |
Toyama | Toyama Prefectural Civic Hall (Primary: On-site, Secondary: Online) |
[Invited Talk (Young Researcher)]
Application of Advanced Linear Algebra Techniques to Array Signal Processing Changyu Zhou, Motoyuki Sato (Tohoku Unvi.) AP2022-248 |
In this paper, some advanced linear algebra techniques are introduced to improve the DOA estimation problems in the fiel... [more] | AP2022-248 pp.81-86 |
| COMP | 2023-03-02 15:15 |
Tokyo | Ochanomizu University | When Input Integers are Given in the Unary Numeral Representation
-- (Preliminary Report) -- Tomoyuki Yamakami (U of Fukui) COMP2022-37 |
Many NP-complete problems take integers as part of their input instances. These input integers are given in general in t... [more] | COMP2022-37 pp.21-27 |
| SANE, SAT (Joint) |
2023-03-03 15:20 |
Okinawa | (Primary: On-site, Secondary: Online) |
Low-Complexity Multiuser Detection of Multiple Collided Packets in Space-based AIS Experiments Kohei Nozaki, Yuyuan Chang, Kazuhiko Fukawa (Tokyo Tech), Daichi Hirahara (JAXA) SAT2022-71 |
Space-based automatic identification system (AIS) is employed to receive the AIS packets from ships on the high seas. Ho... [more] | SAT2022-71 pp.87-92 |
| COMP, IPSJ-AL | 2022-05-20 14:10 |
Online | Online | Computational Power of A Memoryless Mobile Agent in Undirected Rings Taichi Inoue, Naoki Kitamura, Taisuke Izumi, Toshimitsu Masuzawa (Osaka Univ.) COMP2022-8 |
We consider the system where a single mobile agent is deployed in an anonymous, oriented, and undirected ring of $n$ ver... [more] | COMP2022-8 pp.46-53 |
| EA, SIP, SP, IPSJ-SLP [detail] | 2022-03-01 09:20 |
Okinawa | (Primary: On-site, Secondary: Online) |
[Poster Presentation]
Direction-of-Arrival Estimation of Wideband Sound field based on Microphone Array Signals at Two Time Points Takahiro Iwami, Ken-ichi Sawai, Akira Omoto (Kyushu Univ.) EA2021-65 SIP2021-92 SP2021-50 |
We construct a band-limited function space in which the wavenumber spectrum is spherically restricted in the general dim... [more] | EA2021-65 SIP2021-92 SP2021-50 pp.9-14 |
| SANE | 2021-06-25 15:30 |
Online | Online | Trajectory Segment Integration Method for GEO Space Debris Detection Takayuki Inaba, Takumi Taniguchi (UEC) SANE2021-13 |
In this paper, a Trajectory Segment Integration Method for detecting space debris around GEO by optical observation is p... [more] | SANE2021-13 pp.23-28 |
| RCS | 2021-06-23 13:20 |
Online | Online | Investigation on Complexity Reduction in Peak Cancellation Signal-Based PAPR Reduction Method Using Null Space in MIMO Channel Kenta Hosoi (Tokyo Univ. of Science), Nobuhide Nonaka (NTT DOCOMO), Kenichi Higuchi (Tokyo Univ. of Science) RCS2021-38 |
In this paper, we propose an algorithm to further reduce the computational complexity of the peak-to-average power ratio... [more] | RCS2021-38 pp.56-61 |
| COMP, IPSJ-AL | 2020-09-02 11:30 |
Online | Online | What Restrictions Naturally Allow Well-Known NP-Complete Problems to Yield NL-Completeness and the Linear Space Hypothesis? Tomoyuki Yamakami (U of Fukui) COMP2020-10 |
Many practical combinatorial problems have been shown to be NP-complete or NP-hard. To cope with further real-life situa... [more] | COMP2020-10 pp.33-40 |
| OFT, OCS, LSJ (Joint) [detail] |
2019-08-29 15:20 |
Hokkaido | A Study of Multi-Functional Multi-Core Fiber Including a Low Latency Core and Its Application Yuto Sagae, Takashi Matsui, Taiji Sakamoto, Kazuhide Nakajima (NTT) OFT2019-26 |
Not only enlarging transmission capacity but decreasing latency in optical transmission has been drowning considerable a... [more] | OFT2019-26 pp.13-18 |
|
| PN | 2019-08-27 14:40 |
Hokkaido | Kanpo-No-Yado Otaru | C+L-band Weakly-coupled 10-mode-multiplexed Transmission Daiki Soma, Shohei Beppu, Seiya Sumita, Yuta Wakayama, Takehiro Tsuritani (KDDI Research) PN2019-23 |
A 125-μm cladding space-division multiplexing (SDM) fiber is attractive for deployment of the SDM system since it is exp... [more] | PN2019-23 pp.85-89 |
| RCS | 2019-06-21 11:00 |
Okinawa | Miyakojima Hirara Port Terminal Building | Low-Complexity MMSE Channel Estimation in Massive MU-MIMO System Yunfeng Deng, Tomoaki Ohtsuki (Keio Univ.) RCS2019-90 |
In massive multi-user MIMO (MU-MIMO) systems, the base station (BS) requires accurate channel state information (CSI).... [more] |
RCS2019-90 pp.309-314 |
| PN | 2018-03-06 10:20 |
Kagoshima | Minami Tanemachi Shoko Kaikan | Strict and Less Computational Crosstalk-Aware Spectrum and Core Allocation Method in SDM-EONs Kotaro Hashino (Osaka Pref. Univ.), Yusuke Hirota (NICT), Yosuke Tanigawa, Hideki Tode (Osaka Pref. Univ.) PN2017-105 |
Space-division multiplexing elastic optical networks have been studied in order to cope with a dramatic increase in traf... [more] | PN2017-105 pp.93-98 |
| RCS, SR, SRW (Joint) |
2018-02-28 10:50 |
Kanagawa | YRP | Comparisons on Differential Space-Time Coding Schemes with Channel Prediction for Fast Time-Varying Channels Hiroshi Kubo, Toshiki Mori, Akinobu Murayama, Takuma Yamagashi, Nanase Yumoto (Ritsumeikan Univ.) RCS2017-330 |
This paper compares differential space-time coding (DSTC) schemes employing channel prediction for fast time-varying cha... [more] | RCS2017-330 pp.75-80 |
| QIT (2nd) |
2017-11-16 17:05 |
Saitama | Saitama University | Merlinization of complexity classes above BQP Tomoyuki Morimae (Gunma Univ.), Harumichi Nishimura (Nagoya Univ.) |
We study how complexity classes above BQP, such as postBQP, postBQP_FP, and SBQP, change if we ``Merlinize" them, i.e., ... [more] | |
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