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Search Results: Conference Papers
 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 104件中 1~20件目  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
RCS, SAT
(Joint)
2019-08-23
14:20
Aichi Nagoya University [Invited Lecture] Development of IoT Integrated Wireless Sensor Networks
Shusuke Narieda (Mie Univ.), Takeo Fujii (UEC), Kenta Umebayashi (TUAT)
 [more] SAT2019-43 RCS2019-172
p.131(SAT), p.129(RCS)
SRW 2019-08-19
11:15
Aichi Tanzan University [Invited Lecture] Spreading Factor Allocation for Carrier Sensed LoRa Networks
Shusuke Narieda (Mie Univ.), Takeo Fujii (UEC), Kenta Umebayashi (TUAT)
 [more] SRW2019-17
pp.25-28
SeMI, RCS, NS, SR, RCC
(Joint)
2019-07-11
09:35
Osaka I-Site Nanba(Osaka) A study on Auto-Regressive modeling of Duty Cycle
Kohei Okawa, Hiroki Iwata, Kenta Umebayashi (Tokyo Univ. of Agriculture and Tech.), Janne Lehtomäki (Univ. of Oulu), Miguel López-Benítez (Univ. of Liver), Satya Joshi (Univ. of Oulu)
In dynamic spectrum sharing, it is useful to exploit statistical information on spectrum usage.
In this paper, we inve... [more]
SR2019-29
pp.59-64
SR 2019-05-31
10:00
Tokyo Tokyo Big Sight [Technology Exhibit] Development of Cooperative Spectrum Usage Measurement System Prototype for Smart Spectrum Access
Hiroki Iwata, Kenta Umebayashi (TUAT)
In Smart spectrum access (SSA), it is required to realize high-accurate spectrum usage measurements over the long-term, ... [more] SR2019-16
pp.97-103
SR 2019-05-31
10:00
Tokyo Tokyo Big Sight [Technology Exhibit] A study on evaluation method by smart phone application in WLAN channels
Yoshinori Yahiro, Hiroto Ebisawa, Kenta Umebayashi (TUAT)
A smart phone application for wifi analysis is given as a tool to easily investigate the radio wave environment.In this ... [more] SR2019-19
pp.113-118
RCS, SR, SRW
(Joint)
2019-03-06
14:35
Kanagawa YRP Evaluation for Radiowave Propagation Characteristics of LoRa/LoRaWAN Based on Outage Analyses
Kenta Inagaki, Shusuke Narieda (Mie Univ.), Takeo Fujii (UEC), Kenta Umebayashi (TUAT), Hiroshi Naruse (Mie Univ.)
 [more] SR2018-125
pp.31-36
SR 2019-01-25
16:40
Fukushima Corasse, Fukushima city (Fukushima prefecture) A study on widely acceptable model for spectrum usage
Kento Yamada, Kenta Umebayashi (TUAT)
We investigate a flexible and scalable spectrum usage model in time domain for an enhanced dynamic spectrum access (DSA)... [more] SR2018-119
pp.141-147
SR, RCS
(Joint)
(2nd)
2018-10-31
08:55
Overseas Mandarin Hotel, Bangkok, Thailand [Invited talk] 5G Enhanced Mobile Broadband Access Networks in Crowded Environments
Haesik Kim (VTT), Kenta Umebayashi (TUAT)
 [more]
SR 2018-10-31
10:25
Overseas Mandarin Hotel, Bangkok, Thailand [Poster Presentation] Performance analysis of Two elements Adaptive Array Antenna based on Weights and Space Control
Yoshimasa Kimoto, Kenta Umebayashi (TUAT), Antti Tolli, Jarkko Kaleva (UoO)
Adaptive Array Antenna based on weight control (AAA-W) which has fixed antenna position suppresses M-1 interference sign... [more] SR2018-81
pp.51-56
SR 2018-10-31
13:25
Overseas Mandarin Hotel, Bangkok, Thailand [Poster Presentation] Neural Network-based Channel Occupancy Rate Prediction
Hiroki Iwata, Kenta Umebayashi (TUAT), Ahmed Al-Tahmeesschi, Miguel Lopez-Benitez (UoL)
A spectrum occupancy prediction can provide useful information to spectrum sharing-based wireless networks. In this pape... [more] SR2018-88
pp.75-82
SR 2018-10-31
13:25
Overseas Mandarin Hotel, Bangkok, Thailand [Poster Presentation] Efficient channel allocation for Citizens broadband radio service/spectrum access system
Ryo Sato, Kenta Umebayashi (TUAT), K. B. Shashika Manosha (UoO)
Citizens Broadband Radio Service (CBRS) system is the three-tier spectrum sharing systems which consists of incumbent us... [more] SR2018-89
pp.83-84
ASN, NS, RCS, SR, RCC
(Joint)
2018-07-12
10:55
Hokkaido Hakodate Arena [Poster Presentation] A study on efficient Antenna selection based on Spatial Correlation for Adaptive Array Antenna
Takumi Sakamoto, Kenta Umebayashi (TUAT), Antti Tolli (UOO)
In general, the number of interference signals which can be suppressed by an adaptive array antenna is determined by the... [more] RCC2018-50 NS2018-63 RCS2018-108 SR2018-47 ASN2018-44
pp.111-117(RCC), pp.117-123(NS), pp.129-135(RCS), pp.121-127(SR), pp.127-133(ASN)
SR 2018-05-25
10:00
Tokyo Tokyo big sight [Technology Exhibit] Development of Spectrum Usage Measurement System Prototype for Smart Spectrum Access -- Prediction of Spectrum Occupancy --
Hiroki Iwata, Kenta Umebayashi, Ryo Sato, Kento Yamada, Kohei Okawa, Yoshiki Kasahara (TUAT), Janne Lehtomaki (Univ. of Oulu), Miguel Lopez-Benitez (Univ. of Liverpool)
Smart spectrum access (SSA) can achieve a high-efficient spectrum sharing utilizing the prior information regarding spec... [more] SR2018-17
pp.99-106
RCS, SR, SRW
(Joint)
2018-02-28
09:20
Kanagawa YRP Spatial Correlation-based Antenna Selection for Adaptive Array Antenna
Takumi Sakamoto, Kenta Umebayashi (TUAT), Antti Tolli (UoO)
Suppressing interference using an adaptive array antenna, the number of antenna elements determines the number of interf... [more] RCS2017-326
pp.51-56
RCS, SR, SRW
(Joint)
2018-02-28
13:45
Kanagawa YRP A Study on Time Series Modeling of Duty Cycle for Smart Spectrum Access
Daiki Cho, Kenta Umebayashi (TUAT), Shusuke Narieda (NIT, Akashi College), Miguel Lopez Bentez (UoL)
For an efficient spectrum sharing by primary user (PU) and secondary user (SU), SU needs to understand the spectrum usag... [more] SR2017-112
pp.1-7
RCS, SR, SRW
(Joint)
2018-03-02
10:50
Kanagawa YRP Spectrum usage model for Smart Spectrum Access
Kento Yamada, Kenta Umebayashi (TUAT), Janne Lehtomaki, Shashika Manosha Kapuruhamy Badalge (Univ. of Oulu)
In a smart spectrum access, the statistical information in terms of spectrum usage can enhance a spectrum sharing dramat... [more] SR2017-133
pp.109-116
SR 2018-01-25
14:15
Fukuoka Fukuoka univ. A study on adaptive array antenna based on weight and antenna spacing control
Yoshimasa Kimoto, Kenta Umebayashi (TUAT), Antti Tolli (UoO)
Adaptive array antenna with M elements and M RF-chains can suppress M − 1 interference singnals by controling array weig... [more] SR2017-96
pp.15-22
SR 2018-01-26
09:30
Fukuoka Fukuoka univ. A study on parameter setting of Welch FFT-Energy Detection in Spectrum Measurement
Yoshitaka Tamaki, Kenta Umebayashi (Tokyo Univ. of Agriculture and Technology), Janne Lehtomaki (Univ. of Oulu), Miguel Lopez-Benitez (Univ. of Liverpool)
Dynamic Spectrum Access (DSA) can be enhanced by statistical information of actual spectrum usage. The information is av... [more] SR2017-100
pp.35-42
SR 2018-01-26
09:55
Fukuoka Fukuoka univ. Time and frequency varying noise floor estimation for spectrum usage measurement
Hiroki Iwata, Kenta Umebayashi (TUAT), Janne Lehtomaki (UoO), Miguel Lopez-Benitez (UoL)
For efficient spectrum sharing between heterogeneous wireless systems, statistical information regarding spectrum use by... [more] SR2017-101
pp.43-50
SR, SRW
(Joint)
2017-10-24
14:00
Overseas Grand Hotel Palatino, Rome, Italy [Poster Presentation] Antenna configuration for antenna spacing based adaptive array antenna
Kenta Umebayashi, Yoshimasa Kimoto (TUAT), Antti Tolli (UoO)
 [more] SR2017-76 SRW2017-28
pp.31-32(SR), pp.35-36(SRW)
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