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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 21 - 40 of 161 [Previous]  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
SANE 2021-12-16
15:25
Chiba Chiba University
(Primary: On-site, Secondary: Online)
An Interpolation-based Vehicular Speed Measurement Technique for Chirp Sequence Radar using Narrowband Interference Canceller
Takahiro Maruyama (Ibaraki Univ), Masahiro Umehira (Nanzan Univ), Watanabe Yu, Takeda Shigeki, Wang Xiaoyan (Ibaraki Univ) SANE2021-77
 [more] SANE2021-77
pp.79-84
SANE 2021-12-16
16:05
Chiba Chiba University
(Primary: On-site, Secondary: Online)
Impact of short range interference on automotive FMCW radar using iterative interference reduction scheme and its countermeasures
Akari Sakatani, Takuto Shimura (Ibaraki Univ.), Masahiro Umehira (Ibaraki Univ./Nanzan Univ.), Yuu Watanabe, Xiaoyan Wang, Shigeki Takeda (Ibaraki Univ.) SANE2021-79
Wide deployment of FMCW (Frequency Modulated Continuous Wave) radar causes inter-radar interference which results in mis... [more] SANE2021-79
pp.90-95
SANE 2021-12-16
17:15
Chiba Chiba University
(Primary: On-site, Secondary: Online)
A Wideband Interference Suppression Scheme for FMCW Radar using Envelope Detection and Sorting based Interference Detection Threshold Control
Takuto Shimura (Ibaraki Univ.), Masahiro Umehira (Ibaraki Univ./Nanzan Univ.), Yuu Watanabe, Xiaoyan Wang, Shigeki Takeda (Ibaraki Univ.) SANE2021-82
Dense deployment of automotive FMCW radars will cause serious inter-radar interference which results in miss-detection o... [more] SANE2021-82
pp.107-112
SRW, SeMI, CNR
(Joint)
2021-11-25
09:30
Tokyo Kikai-Shinko-Kaikan Bldg.
(Primary: On-site, Secondary: Online)
A Proposal of Deep Reinforcement Learning based Spectrum Access Method
Yuto Teraki, Xiaoyan Wang (Ibaraki Univ.), Masahiro Umehira (Nanzan Univ.) SRW2021-29
In the Internet of Things (IoT), the shortage of frequency resources becomes a problem when many devices communicate at ... [more] SRW2021-29
pp.1-6
AP, RCS
(Joint)
2021-11-10
10:25
Nagasaki NBC-Bekkan (Nagasaki)
(Primary: On-site, Secondary: Online)
Spectrum Efficiency Improvement of DPD based Linearizer using Operation Point Estimation Pilot Signal
Atsushi Masubuchi (Ibaraki Univ.), Masahiro Umehira (Nanzan Univ.), Xiaoyan Wang, Shigeki Takeda (Ibaraki Univ.) RCS2021-143
 [more] RCS2021-143
pp.1-6
MIKA
(3rd)
2021-10-29
10:30
Okinawa
(Primary: On-site, Secondary: Online)
[Poster Presentation] Performance Evaluation of DPD based Linearizer using Operation Point Estimation Pilot Signal for Multi-level Modulation Signals
Atsushi Masubuchi (Ibaraki Univ.), Masahiro Umehira (Nanzan Univ.), Xiaoyan Wang, Shigeki Takeda (Ibaraki Univ.)
 [more]
SRW 2021-08-24
10:00
Online Online Design of Multi-carrier Pilot Signals for Operation Point Estimation in Digital Pre-Distortion based Linearizer
Atushi Masubuchi, Masahiro Umehira, Xiaoyan Wang, Shigeki Takeda (Ibaraki Univ.) SRW2021-13
Mobile terminal is required to improve the power utilization efficiency of HPA (High Power Amplifier) because of the inc... [more] SRW2021-13
pp.1-6
RCS, SR, SRW
(Joint)
2021-03-04
10:30
Online Online Performance Evaluation of Digital Pre-Distortion based Linearizer using Operation Point Estimation Pilot for Mobile Terminal in Non-linear HPA with AM/AM and AM/PM Characteristics
Atsushi Masubuchi, Akira Tada, Masahiro Umehira, Xiaoyan Wang, Shigeki Takeda (Ibaraki Univ.) SRW2020-59
With the increase in uplink speeds and the use of millimeter wave bands, it is required to futher improve the power util... [more] SRW2020-59
pp.29-34
RCS, SR, SRW
(Joint)
2021-03-05
14:00
Online Online [Special Invited Talk] Present, Past and Future of Wireless Systems -- Looking back the half century with radio --
Masahiro Umehira (Ibaraki Univ.) RCS2020-259 SR2020-86 SRW2020-79
Just a few special people used wireless systems half century ago, however wireless systems such as mobile communications... [more] RCS2020-259 SR2020-86 SRW2020-79
p.260(RCS), p.84(SR), p.96(SRW)
SANE 2021-01-28
15:45
Online Online A Proposal of an Advanced Chirp Sequence Radar using Narrowband Interference Canceller
Daiki Ammen, Masahiro Umehira, Xiaoyan Wang, Shigeki Takeda (Ibaraki Univ.) SANE2020-43
A chirp sequence radar is promising for automotive applications for an automated driving car and advanced driver assista... [more] SANE2020-43
pp.32-37
SR 2021-01-26
10:50
Online Online An radio access control mechanism based on deep reinforcement learning
Hang Zhou, Xiaoyan Wang, Masahiro Umehira (Ibaraki Univ.) SR2020-56
 [more] SR2020-56
pp.52-59
SR 2021-01-26
11:15
Online Online Reinforcement Learning based Joint Channel/Subframe Selection Scheme for Fair LTE-WiFi Coexistence
Yuki Kishimoto, Xiaoyan Wang, Masahiro Umehira (Ibaraki Univ.) SR2020-57
In recent years, there has been an increasing demand for high-speed and large-capacity mobile communications. To deal wi... [more] SR2020-57
pp.60-66
SIP, IT, RCS 2021-01-22
11:05
Online Online Design and performance of receiving filter system for Overlap-Windowed-DFTs-OFDM with overlap FFT filter bank
Motoki Ishibashi, Masahiro Umehira, Wang Xiaoyan, Shigeki Takeda (Ibraki Univ.) IT2020-88 SIP2020-66 RCS2020-179
 [more] IT2020-88 SIP2020-66 RCS2020-179
pp.136-141
SIP, IT, RCS 2021-01-22
12:30
Online Online Digital Pre-distortion based HPA Linearizer using Multi-carrier Operation Point Estimation Pilot Signals for Mobile Device Applications
Akira Tada, Masahiro Umehira, Xiaoyan Wang, Sigeki Takeda (Ibaraki Univ.) IT2020-91 SIP2020-69 RCS2020-182
 [more] IT2020-91 SIP2020-69 RCS2020-182
pp.153-158
SRW, SeMI, CNR
(Joint)
2020-11-27
11:10
Online Online [Invited Lecture] Evaluation of V2V Communications in Platoon using Directional Antenna
Diquan Wang (Hi-Think), Xiaoyan Wang, Masahiro Umehira (Ibaraki U.) SRW2020-36
 [more] SRW2020-36
pp.50-54
RCS 2020-10-22
13:00
Online Online [Invited Lecture] Link outage probability due to atmospheric and rain attenuation in THz-Band outdoor wireless communications
Masahiro Umehira, Xiaoyan Wang, Shigeki Takeda (Ibaraki Univ.) RCS2020-97
 [more] RCS2020-97
pp.30-35
SRW 2020-08-25
10:40
Online Online [Short Paper] Worst-Month Statistics of Outage Probability in THz-Band Wireless Communication Systems
Yuki Hatahara, Masahiro Umehira, Xiaoyan Wang (Ibaraki Univ.) SRW2020-20
Very wide spectrum is available in THz-band for over 100Gbps ultra-broadband wireless communications, however THz-band o... [more] SRW2020-20
pp.57-58
RCS, SR, SRW
(Joint)
2020-03-05
09:25
Tokyo Tokyo Institute of Technology
(Cancelled but technical report was issued)
Deep reinforcement learning based access control scheme for radio access networks
Hang Zhou, Xiaoyan Wang, Masahiro Umehira (Ibaraki Univ.) SR2019-123
After a disaster occurred, it is extremely important to reconstruct the network and provide the communication services t... [more] SR2019-123
pp.59-64
RCS, SR, SRW
(Joint)
2020-03-05
09:50
Tokyo Tokyo Institute of Technology
(Cancelled but technical report was issued)
Reinforcement learning based channel selection scheme for WiFi-LTE coexistence in unlicensed spectrum
Yuki Kishimoto, Xiaoyan Wang, Masahiro Umehira (Ibaraki Univ.) SR2019-124
In recent years, with the rapid increase in mobile traffic, there is an increasing demand of wider bandwidth for mobile ... [more] SR2019-124
pp.65-70
RCS, SR, SRW
(Joint)
2020-03-05
14:15
Tokyo Tokyo Institute of Technology
(Cancelled but technical report was issued)
Preliminary Study of HPA Linearization System using Look-up Table of HPA Input-Output Characteristics
Akira Tada, Masahiro Umehira, Xiaoyan Wang, Shigeki Takeda (Ibaraki Univ.) RCS2019-368
In order to reduce adjacent channel leakage power (ACLP) caused by small output back-off operation of HPA (High Power Am... [more] RCS2019-368
pp.245-249
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