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理工学部 情報理工学科

Researcher List >> Shibuya Tomoharu
 

Shibuya Tomoharu

 
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NameShibuya Tomoharu
URLhttps://www.ts-lab.net
AffiliationSophia University
SectionFaculty of Science and Technology, Department of Information and Communication Sciences
Job titleProfessor
Degree博士(工学)(東京工業大学)
Research funding number20262280
J-Global ID200901097688266540

Profile

1991- Applications and fundamental aspects on the error correcting codes, especially on the parameters of algebraic codes 2001- On the performance of LDPC codes and their decoding algorithm 2008- On the convergence behavior of the iterative decoding 2010- Efficient encoding algorithm for linear codes and related topics Coding for Non-volatile memory 2011- Construction of quantum error correcting codes On the convergence bihavior of the iterative decoding
(Subject of research) Error Correcting Codes with Iterative Decoding Researches in the Parameters of Algebraic Codes

Research Interests

 
符号化 ,LDPC Codes ,線形符号 ,Error Correcting Codes ,線形連立方程式 ,Iterative Decoding ,Parameters of Codes

Research Areas

 
  • Informatics / Information security / 
  • Natural sciences / Mathematical physics and basic theory / 
  • Informatics / Computational science / 
  • Natural sciences / Algebra / 
  • Informatics / Information theory / 

Awards

 
Mar 2023
情報理論とその応用サブソサイエティ学生優秀発表賞,Efficient composition of encoding polynomial in distributed coded computing scheme
Daisuke Hibino Tomoharu Shibuya 
 
Jan 2017
電子情報通信学会情報理論とその応用サブソサイエティ, 情報理論とその応用サブソサイエティ学生優秀発表賞,同一順位に複数のセルが属するランク変調符号の群論的な表現とそ の応用について
須藤尊 
 
Nov 2005
第7回 エリクソン・ヤング・サイエンティスト・アワード
 
Dec 2001
平成12年度 SITA奨励賞
 
Mar 1997
平成8年度電子情報通信学会学術奨励賞
 

Papers

 
 
Daisuke Hibino   Tomoharu Shibuya   
122(427) 325-330   Mar 2023   
 
Mariko FUJII   Tomoharu SHIBUYA   
IEICE TRANSACTIONS on Information and Systems   E.103-D(1) 11-24   Jan 2020   [Refereed]
 
Tomoharu Shibuya   Takeru Sudo   
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences   E100A(12) 2558-2571   Dec 2017   [Refereed]
In this paper, we propose a group theoretic representation suitable for the rank-modulation (RM) scheme over the multi-cell ranking presented by En Gad et al. By introducing an action of the group of all permutation matrices on the set of all perm...
 
Tomoharu Shibuya   Takeru Sudo   
PROCEEDINGS OF 2016 INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY AND ITS APPLICATIONS (ISITA 2016)   131-135   2016   
In this paper, we study rank-modulation (RM) rewriting codes based on dominating sets. By introducing a special class of dominating sets in a construction of RM rewriting codes and employing the notion of a group action in an analysis of those cod...
 
Keisuke Kodaira   Mihoko Wada   Tomoharu Shibuya   
IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES   E97A(11) 2247-2253   Nov 2014   [Refereed]
The amplitude damping (AD) quantum channel is one of the models describing evolution of quantum states. The construction of quantum error correcting codes for the AD channel based on classical codes has been presented, and Shor et al. proposed a c...

Misc.

 
 
SHIBUYA Tomoharu   
IEICE technical report   111(180) 21-26   Aug 2011
It is well known that LDPC codes can exhibit excellent performance by iterative decoding with O(n) computational complexity. As for their encoding, however, no algorithm has been developed that can be executed with computation less than O(n^2). Th...
 
SHIBUYA Tomoharu   
IEICE Technical Report   110(205) 69-74   Sep 2010
Efficient algorithms to solve a system of linear equations have been extensively and deeply investigated in a large number of researches. Among them, the block-triangularization is one of the well-know approaches effective for linear systems defin...
 
SHIBUYA Tomoharu   NAKADE Keita   
IEICE technical report   109(444) 147-151   Feb 2010
Recently, Haley and Grant introduced the concept of reversible codes - a class of linear codes encodable by the iterative message-passing algorithm based on the Jacobi method over F_2. They also developed a concrete procedure to construct parity c...
 
SHIBUYA Tomoharu   NAKADE Keita   
IEICE technical report   109(446) 147-151   Feb 2010
Recently, Haley and Grant introduced the concept of reversible codes - a class of linear codes encodable by the iterative message-passing algorithm based on the Jacobi method over F_2. They also developed a concrete procedure to construct parity c...
 
Takayuki Nozaki   Kenta Kasai   Tomoharu Shibuya   Kohichi Sakaniwa   
IEICE Technical Report   102(202) 37-42   Sep 2009   

Books and Other Publications

 
 
澁谷 智治(Part:Joint author, pp.133-156)
コロナ社   26 Oct 2016   (ISBN:9784339028577)   
 
澁谷 智治(Part:Joint author)
朝倉書店   15 Nov 2011   (ISBN:9784254280036)   
数理工学,および関連分野から約200のキーワードを取り上げ,1項目あたり2頁前後で解説した辞典である。
 
Shibuya Tomoharu(Part:Joint author)
Corona Publishing   Apr 2010   (ISBN:9784339024463)   
 
澁谷 智治(Part:Joint author)
オーム社   Sep 2008   (ISBN:9784274205958)   
 
澁谷 智治(63-93)
昭晃堂   May 2001   (ISBN:4785631317)   

Presentations

 
 
Daisuke Hibino   Tomoharu Shibuya   
Technical Committee Meeting on Information Theory   15 Mar 2023   
 
Taiyu Kamiyama   Yuta Ugaya   Keisuke Kodaira   Tomoharu Shibuya   
2018 The International Symposium on Information Theory and Its Applications   28 Oct 2018   Engineering Sciences Society, IEICE   
conventional secret sharing, password protected secret sharing (PPSS) was invented. Recently, Nakahara et al. improved Ogata's multiple-use PPSS (mPPSS), which protects multiple data by one password, by employing secure computation known as CSEC70...
 
Tomoharu Shibuya   
Japan-Singapore Workshop on Coding and Information Theory   4 Mar 2018   School of Physical & Mathematical Sciences, Nanyang Technological University   
In this talk, a group theoretic representation suitable for the
rank-modulation (RM) scheme over the multi-cell ranking developed by
En Gad et al. is presented. By introducing an action of the group of
all permutation matrices on the set of all pe...
 
須藤 尊   渋谷 智治   
電子情報通信学会情報理論研究会   20 Jan 2017   電子情報通信学会   
 
Tomoharu Shibuya   Takeru Sudo   
Conference of Technical Committee on Information Theory   20 May 2016   IEICE   

Professional Memberships

 
 
   
 
情報処理学会
 
   
 
日本数学会
 
   
 
IEEE IT Society
 
   
 
電子情報通信学会

Research Projects

 
 
Project Year: Apr 2020 - Mar 2023
 
Group theoretic approach to the design of codes suitable for flash memories
Japan Society for the Promotion of Science: Grants-in-Aid for Scientific Research
SHIBUYA Tomoharu 
Project Year: Apr 2015 - Mar 2018
 
Study of new analyzing method of LDPC codes and there practical encoding algorithm based on mathematical techniques on the system of linear equations
Japan Society for the Promotion of Science: Grants-in-Aid for Scientific Research
SHIBUYA Tomoharu 
Project Year: Apr 2012 - Mar 2015
 
Study on the structure of fundamental polytope of linear codes
Japan Society for the Promotion of Science: Grants-in-Aid for Scientific Research
SHIBUYA Tomoharu 
Project Year: 2008 - 2010
 
高SNR時にも優れた誤り訂正能力を示すLDPC符号化システムの研究
日本学術振興会: 科学研究費助成事業
澁谷 智治 
Project Year: 2006 - 2007