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TAKYU Osamu

Academic OrganizationAcademic Assembly School of Science and Technology Institute of EngineeringTEL
Education and Research OrganizationFaculty of Engineering Electrical and Computer EngineeringFAX
PositionAssociate ProfessorMail Address
Address4-17-1, Wakasato, Nagano City 380-8553Web site

Modified:07/31/2019

Profile

Research Field
Communication/Network engineering
Current Subject
Research and Development of Intelligent MAC Protocol for Cognitive Radio
Keywords:Cognitive Radio , MAC Protocol , Intelligent , 2009-2011 , Study of Intelligent MAC Protocol for Scandalizing Cognitive Radio
Experimental Study of Identification Method of Parallel Transmitted Symbols for MIMO and Cognitive Radio System
Keywords:Cognitive Radio , MIMO , 2008-2011 , Study of Identification Method of Parallel Transmitted Symbols for MIMO and Cognitive Radio System
Identification of Parallel Trasnsmitted Symbols
Keywords:Cognitive Radio , MIMO , 2008-2011
Academic Societies
Academic Societies
The Institute of Electrical and Electronics Engineers
The Institute of Ellectronics, Information and Coommunication Engineers

Committee of Academic Societies
2013- , Technical Committee on Smart Radio, The Institute of Ellectronics, Information and Coommunication Engineers , Secretary
2013- , Shinetu Section, The Institute of Ellectronics, Information and Coommunication Engineers , Member
2010- , Communication Society, The Institute of Electrical and Electronics Engineers , International Conference on ICC, TPC Member
2008- , Journal of Society, The Institute of Ellectronics, Information and Coommunication Engineers , Regular Reviewer
2008- , Communication Society, The Institute of Electrical and Electronics Engineers , International Conference on Globcom, TPC Member
2014-2015 , Communication Society, The Institute of Electrical and Electronics Engineers , Publicity Chair
2010-2013 , Technical Committee on Softwear Radio, The Institute of Ellectronics, Information and Coommunication Engineers , Assistant
2009-2010 , Technical Committee on Softwear Radio, The Institute of Ellectronics, Information and Coommunication Engineers , Expert Member
Academic Background
Graduate School
Keio University , (Open and Environmental Systems , Science and Technology) , 2006
Keio University , (Open and Environmental Systems , Science and Technology) , 2003

College
Tokyo University of Science , (Science and Technology) , 2002

Degree
Phylosopy of Doctor (Engineering) , Keio University
Awards
2017
2013
2011
2011
2010
2009
2003 , Young Researcher's Encouragement Award
Research Career
Research Career
2014- , Associate Prof. Faculty of Engineering, Shinshu Unin.
2013-2014 , Associate Prof. Faculty of Technology, Shinshu Univ.
2011-2013 , Assistant Prof. Faculty of Technology, Shinshu Univ.
2007-2011
2006-2007

Overseas Education
2004-2005 , Visiting Scholar, University of Sydney, Australia

Research

Books, Articles, etc.
Articles
Adaptive Channel Assignment With Predictions of Sensor Results and Channel Occupancy Ratio in PhyC-SN
IEEE ACCESS,7:44645-44658 2019
Author:Takyu, Osamu; Shirai, Keiichiro; Fujii, Takeo; Ohta, Mai;


ID Insertion and Data Tracking with Frequency Offset for Physical Wireless Parameter Conversion Sensor Networks
SENSORS,19(4):- 2019
Author:Takyu, Osamu; Shirai, Keiichiro; Ohta, Mai; Fujii, Takeo;


Clustering Transmission Opportunity Length (CTOL) Model over Cognitive Radio Network
SENSORS,18(12):- 2018(Dec.)
Author:Mohamad, Mas Haslinda; Sali, Aduwati; Hashim, Fazirulhisyam; Nordin, Rosdiadee; Takyu, Osamu;


Fast Rendezvous Scheme with a Few Control Signals for Multi-Channel Cognitive Radio
IEICE TRANSACTIONS ON COMMUNICATIONS,E101B(7):1589-1601 2018(Jul.)
Author:Soya, Hayato; Takyu, Osamu; Shirai, Keiichiro; Ohta, Mai; Fujii, Takeo; Sasamori, Fumihito; Handa, Shiro;


Fusion Center Controlled MAC Protocol for Physical Wireless Parameter Conversion Sensor Networks (PHY-C SN)
IEICE TRANSACTIONS ON COMMUNICATIONS,E100B(7):1105-1114 2017(Jul.)
Author:Kakinuma, Koji; Ohta, Mai; Takyu, Osamu; Fujii, Takeo;


Optimal cluster head selection and rotation of cognitive wireless sensor networks for simultaneous data gathering and long life system
INTERNATIONAL JOURNAL OF DISTRIBUTED SENSOR NETWORKS,13(12):- 2017
Author:Takyu, Osamu; Fujii, Shohei; Akimoto, Youhei; Ohta, Mai; Fujii, Takeo; Sasamori, Fumihito; Handa, Shiro;


A threshold decision method for MRC in QAM constellation rearrangement
IEICE Communications Express,5(7):236-241 2016
Author:Sasamori Fumihito; Sakamoto Naoki; Takyu Osamu; Handa Shiro;
Keywords:constellation rearrangement; threshold decision; maximal-ratio combining; repetition coding; OFDM;


Optimization of Learning Time for Learning-assisted Rendezvous Channel in Cognitive Radio System
IEICE Transaction on Communications,E98-B(2):pp.360-369 2015(Feb. 01)
Author:O. Takyu, T. Yamakita, T. Fujii, M. Ohta, F. Sasamori, S. Handa


Joint Resource Allocation with Interference Constraint for Cognitive Multi-Hop Wireless Networks
IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES,E98A(2):569-577 2015(Feb.)
Author:Kako, Shuta; Takyu, Osamu; Fujii, Takeo;


Precise BER Analysis of Repetition Coded OFDM Systems over Time- and Frequency-selective Rayleigh Fading Channels
IEICE Transaction on Communications,E98-B(1):pp.88-98 2015(Jan. 01)
Author:F. Sasamori, S. Asada, O. Takyu, S. Handa


Data Tracking and Effect of Frequency Offset to Simultaneous Collecting Method for Wireless Sensor Networks
INTERNATIONAL JOURNAL OF DISTRIBUTED SENSOR NETWORKS,:- 2015
Author:Myoenzono, Ryo; Takyu, Osamu; Shirai, Keiichiro; Fujii, Takeo; Ohta, Mai; Sasamori, Fumihito; Handa, Shiro;


Resource Block Assignment to Reduce Peak to Average Power Ratio in Multi-User OFDM
IEICE Transaction on Communications,E97-B(8):pp.1689-1700 2014(Aug.)
Author:O.Takyu, Y. Umeda, F. Sasamori, S. Handa,


コグニティブ無線システムのための時間変化に追従可能な高精度占有率測定法
映像メディア学会誌,68(5):pp.J213-216 2014(May)
Author:若尾 悠太,田久 修,藤井 威生,笹森 文仁,半田 志郎


Dynamic Spectrum Sharing for OFDMA-Based Multi-hop Cognitive Radio Networks with Priority
WIRELESS PERSONAL COMMUNICATIONS,74(3):1081-1097 2014(Feb.)
Author:Kako, Shuta; Fujii, Takeo; Takyu, Osamu


A High-Speed LED Driver That Sweeps Out the Remaining Carriers for Visible Light Communications
JOURNAL OF LIGHTWAVE TECHNOLOGY,32(2):239-249 2014(Jan. 15)
Author:Kishi, Toshiki; Tanaka, Hiroyuki; Umeda, Yohtaro; Takyu, Osamu


スロットベースのランダムアクセス型プライマリシステムと周波数共有するセカンダリシステムのキャリアセンス制御と干渉マージンの設計
電子情報通信学会和文論文誌B,J96-B(7):pp.729-741 2013(Jul.)
Author:堀江駿太,田久 修,藤井威生,楳田洋太郎


Adaptive Iterative Decoding of Finite-Length Differentially Encoded LDPC Coded Systems with Multiple-Symbol Differential Detection
IEICE TRANSACTIONS ON COMMUNICATIONS,E96B(3):847-858 2013(Mar.)
Author:Yu, Yang; Handa, Shiro; Sasamori, Fumihito; Takyu, Osamu


TCP性能向上のためのマルチホップコグニティブネットワーク向けMACプロトコルの提案
電子情報通信学会和文論文誌B,J96-B(3):pp.356-365 2013(Mar.)
Author:木村 孝政, 藤井 威生,田久 修


CDMA変調された信号に対する変調方式識別法
電子情報通信学会和文論文誌B,J95-B(2):pp.309-316 2012(Feb. 01)
Author:杉本 成正 田久 修 楳田 洋太郎


An Autonomous Selective Cooperative ARQ Protocol for Hybrid Mobile Wireless Sensor Networks
Journal of Communications,6(2):pp.157-167 2011(Apr.)
Author:N. LYNN, O. TAKYU, K. ADACHI, T. OHTSUKI, M. NAKAGAWA


MAC Layer Importance for Multimedia Services in Future Cognitive Radio World
IEEE COMSOC MMTC E-Letter,6(3):pp.54-57 2011(Mar.)
Author:T. Fujii and O. Takyu


Phase Rotation for Constructing Uniform Frequency Spectrum in IFDMA Communication
IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES,E93A(12):2672-2681 2010(Dec.)
Author:Yamasaki, Takeo; Takyu, Osamu; Adachi, Koichi; Umeda, Yohtaro; Nakagawa, Masao


Frequency Rotation for Suppressing Multipath Interference and Achieving Large Frequency Diversity in Uplink IFDMA
IEICE TRANSACTIONS ON COMMUNICATIONS,E93B(5):1284-1288 2010(May)
Author:Takyu, Osamu; Umeda, Yohtaro; Nakagawa, Masao


Scattered Pilot Assisted Channel Estimation for IFDMA Uplink
IEICE TRANSACTIONS ON COMMUNICATIONS,E92B(12):3803-3814 2009(Dec.)
Author:Yamasaki, Takeo; Takyu, Osamu; Umeda, Yohtaro


Frequency spectrum rotation in Interleaved Frequency Division Multiplexing
IEICE TRANSACTIONS ON COMMUNICATIONS,E91B(7):2357-2365 2008(Jul.)
Author:Takyu, Osamu; Nakagawa, Masao


Relay method of sending soft decision symbol based on the result of error detecting code in cooperative communication
IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES,E90A(11):2404-2412 2007(Nov.)
Author:Fukuyama, Yuki; Takyu, Osamu; Adachi, Koichi; Nakagawa, Masao


Evaluation of asymmetric TDD systems employing AMC and HARQ by considering MCS selection errors
IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES,E89A(11):3138-3147 2006(Nov.)
Author:Lynn, Nandar; Takyu, Osamu; Esmailzadeh, Riaz; Nakagawa, Masao


Companding system based on time clustering for reducing peak power of OFDM symbol in wireless communications
IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES,E89A(7):1884-1891 2006(Jul.)
Author:Takyu, Osamu; Ohtsuki, Tomoaki; Nakagawa, Masao


A sign selection method of orthogonal variable spreading factor code for peak power reduction in multi-rate OFCDM systems
IEICE TRANSACTIONS ON COMMUNICATIONS,E89B(4):1333-1345 2006(Apr.)
Author:Takyu, O; Ohtsuki, T; Nakagawa, M;


Criterion for reducing error rate degradation by nonlinear amplifier for multicarrier transmission
IEICE TRANSACTIONS ON COMMUNICATIONS,E88B(7):3057-3061 2005(Jul.)
Author:Takyu, O; Ohtsuki, T; Nakagawa, M;


Frequency offset compensation with MMSE-MUD for multi-carrier CDMA in quasi-synchronous uplink
IEICE TRANSACTIONS ON COMMUNICATIONS,E87B(6):1495-1504 2004(Jun.)
Author:Takyu, O; Ohtsuki, T; Nakagawa, M;


Presentations
Modified rendezvous scheme with inferring access channel probability of slave by master
IEEE ICOIN 2018 , :229-234 2018(Jan.)
Author:Hayato Soya, Osamu Takyu, Keiichiro Shirai, Mai Ohta, Takeo Fujii, Fumihito Sasamori, Shiro Handa


Transmit control for secure information sharing in untrusted relay with two antennas
IEEE ICOIN 2018 , :771-775 2018(Jan.)
Author:Tetsuya Noguchi, Osamu Takyu, Takeo Fujii, Tomoaki Ohtsuki, Fumihito Sasamori, and Shiro Handa


Experimental study of signaling with IFDMA modulation and nonlinear amplifying for recovering access channel mismatch
IEEE ICOIN 2018 , :787-790 2018(Jan.)
Author:Ryo Kurosawa, Osamu Takyu, Mai Ohta, Takeo Fujii, Fumihito Sasamori, Shiro Handa


Transmit control and data separation in physical wireless parameter conversion sensor networks with event driven sensor
IEEE Radio and Wireless Week (RWW 2018) , :12-14 2018(Jan.)
Author:Kyousuke Fukuda, , Osamu Takyu, Mai Ohta, Takeo Fujii, Fumihito Sasamori, Shiro Handa


Consideration of security for PLNC with untrusted relay in game theoretic perspective
IEEE Radio and Wireless Week (RWW 2018) , :109-112 2018(Jan.)
Author:Yusuke Shirasaki, Osamu Takyu, Takeo Fujii, Tomoaki Ohtsuki, Fumihito Sasamori, and Shiro Handa


Secure information sharing with mirroring null steering through untrusted relay with two antennas
IEEE Radio and Wireless Week (RWW 2018) , :771-775 2018(Jan.)
Author:Tetsuya Noguchi, Osamu Takyu, Takeo Fujii, Tomoaki Ohtsuki, Fumihito Sasamori, and Shiro Handa


A study of monitoring system for radio leak with massive radio sensors
APSIPA ASC 2017 , :1806-1810 2017(Dec.)
Author:Shunsuke Imai, Osamu Takyu, Fumihito Sasamori, Shiro Handa


Control signal transmission based on IFDMA and receiver with nonlinear amplifier for compensating access channel mismatch
2017 IEEE 86th Vehicular Technology Conference (VTC-Fall) , :5pages 2017(Sep.)
Author:Ryo Kurosawa, Osamu Takyu, Mai Ohta, Takeo Fujii, Fumihito Sasamori, Shiro Handa


Evaluation of Information Leak by Ipersonated CSI in PLNC considering physical layersecurity
IEEE , RWS2015 , :3pages 2015(Jan.)
Author:K.Matsumoto, O. Takyu, T.Fujii, T.Ohtsuki, F.Sasamori, S.Handa,


Physical Layer Network Coding with Multiple Untrusted Relays for Physical Layer Security
APSIPA , APSIPA ASC , :5pages 2014(Dec.)
Author:K.Yamaguchi, O. Takyu, T.Fujii, T.Ohtsuki, F.Sasamori, S.Handa


Learning assisted rendezvous channel in cognitive radio system
IEEE , ICCS2014 , :5pages 2014(Nov.)
Author:O. Takyu, T.Yamakita, T.Fujii, F.Sasamori, S.Handa

Patents
Patents
送信装置,増幅回路及び送信方法
Research Grants
Joint Research
2009 - 2009 , アプリケーション・端末指向型スケジューリング手法

Cooperative research with industry
2017 - 2017 , オーグメンテッドワイヤレス:拡張無線環境学習を利用した無線周波数共用技術の研究開発
2016 - 2016 , クラウドソーシングを用いた多次元環境認識による先進的無線ネットワークの研究開発
2013 - 2015 , 環境認知型超高効率無線センサネットワークの研究開発
2009 - 2011 , コグニティブ無線のためのインテリジェントMACレイヤ技術に関する研究開発

Grants‐in‐aid for Scientific Research(Research Representative)
2017 - 2019 , 稠密無線センサネットワークのためのセンサ情報空間・無線物理空間相互情報パッシング , 基盤研究(B)
2016 - 2018 , 電波漏洩対策に有効なマッシブ電波センサアレイ , 挑戦的萌芽研究
2012 - 2014 , コグニティブ無線に適した学習型占有率測定法の最適設計 , 若手研究(B)
2008 - 2011 , MIMOコグニティブ無線における送信アンテナ数を認知するための実験的検討 , 若手研究(B)

Scholarship donation
2016 , 混信状態を活用した安全性と大容量化を両立する無線ネットワークの創出
2013 , 無線エージェントを利用した高スループット・低消費電力・自立分散無線システム

Other
2010 - 2010 , 高度化無線通信システムにおける増幅器の電力利用効率を考慮した送信制御法の検討
2009 - 2009 , Interleaved 周波数分割多元接続におけるデータ信号を利用した周波数オフセット推定法
Research Activities
Journal Editorial Board
2012-2013 , 電子情報通信学会 英文論文誌B 特集号「Heterogeneous Networksfor Future Cellular Systems」
2015-2015 , 電子情報通信学会 英文論文誌B 特集号「5G Radio Access Networks―Part II: Multi-RAT Heterogeneous Networks and Smart Radio Technologies」Secretary

Journal Reviewer
2008-2011 , 電子情報通信学会 ソサイエティ誌

Education

Lectures
2016
2016

Social Activities

Social Activitie
Other Professional Activities
20090901 - 20090901 , コグニティブ無線技術と低消費電力化変復調方式(無線通信資源の高効率運用に向けて) , 依頼講演 , 講師