Publications

Dissertation

• T. Koumoto, "Study on Iterative Soft-Decision Decoding Algorithms for Binary Linear Block Codes," Dissertation of Nara Institute of Science and Technology, NAIST-IS-DT9661911, February 1998.

Journal Papers

• T. Kasami, T. Koumoto, T. Fujiwara, H. Yamamoto, Y. Desaki and S. Lin, "Low Weight Subtrellises for Binary Linear Block Codes and Their Application," IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E80-A, No. 11, pp. 2095-2103, November 1997.
• T. Koumoto, T. Kasami and S. Lin, "A Sufficient Condition for Ruling Out Some Useless Test Error Patterns in Iterative Decoding Algorithms," IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E81-A, No. 2, pp. 321-326, February 1998.
• T. Koumoto, T. Takata, T. Kasami and S. Lin, "A Low-Weight Trellis Based Iterative Soft-Decision Decoding Algorithm for Binary Linear Block Codes," IEEE Transactions on Information Theory, Vol. 45, No. 2, pp. 731-741, March 1999.
• T. Kasami, Y. Tang, T. Koumoto and T. Fujiwara, "Sufficient Conditions for Ruling-Out Useless Iteration Steps in a Class of Iterative Decoding Algorithms," IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E82-A, No. 10, pp. 2061-2073, October 1999.
• H. Tokushige, Y. Tang, T. Koumoto and T. Kasami, "An Improvement to GMD-like Decoding Algorithms," IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E83-A, No. 10, pp. 1963-1965, October 2000.
• H. Tokusige, K. Nakamae, T. Koumoto, Y. Tang and T. Kasami, "Selection of Search Centers in Iterative Soft-decision Decoding Algorithms," IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E84-A, No. 10, pp. 2404-2409, October 2001.
• J. Asatani, K. Tomita, T. Koumoto, T. Takata and T. Kasami, "A Soft-decision Iterative Decoding Algorithm Using A Top-down and Recursive Minimum Distance Search," IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E85-A, No. 10, pp. 2220-2228, October 2002.
• H. Tokusige, T. Koumoto, M. Fossorier and T. Kasami, "Selection Method of Test Patterns in Soft-decision Iterative Bounded Distance Decoding Algorithms," IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E86-A, No. 10, pp. 2445-2451, October 2003.
• J. Asatani, T. Koumoto, K. Tomita and T. Kasami, "Reduced Complexity Iterative Decoding Using a Sub-optimum Minimum Distance Search," IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E86-A, No. 10, pp. 2596-2600, October 2003.
• K. Yasuhara and T. Kusaka, "Design and Implementation of Dynamic Autonomous Distributed Connection Switching Function without Data Loss in PeerCast(in Japanese)," IEICE Transactions on Information and Systems, Vol. J92-D, No. 9, pp. 1677-1681, September 2009.
• T. Kusaka, R. Yokoyama and T. Fujiwara, "A Recursive Method for Vector Generation in Non-Increasing Order of its Likelihood for all Binary Vectors and its Application for Linear Block Code Decodings," IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E95-A, No. 4, pp. 801-810, April 2012.

International Conferences and Workshops(with review)

• T. Kasami, T. Koumoto, T. Takata and S. Lin, "The Effectiveness of the Least Stringent Sufficient Condition on the Optimality of Decoded Codewords," Proceedings of the 3rd International Symposium on Communication Theory & Applications, pp.324-333, Charlotte Mason College, Ambleside, Lake District, UK, July 1995. Also, in Communications Coding and Signal Processing, Ed. by B. Honary etc., pp. 2-13, John Wiley and Sons, 1998.
• T. Kasami, T. Koumoto, T. Takata T. Fujiwara and S. Lin, "The Least Stringent Sufficient Conditions on the Optimality of Decoded Codewords," Proceedings of the 1995 IEEE International Symposium on Information Theory, p. 470, Whistler, Canada, September 1995.
• T. Koumoto, T. Takata, T. Kasami and S. Lin, "An Iterative Soft-Decision Decoding Algorithm," Proceedings of the International Symposium on Information Theory and Its Applications, pp. 806-810, Victoria, Canada, September 1996.
• T. Kasami, T. Koumoto, T. Fujiwara, H. Yamamoto and S. Lin, "The Structure and Complexity of Subtrellis Diagrams for Low Weight Codewords of Binary Linear Block Codes," Proceedings of the 1997 IEEE International Symposium on Information Theory, p. 364, Ulm, Germany, June 1997.
• M. P. C. Fossorier, T. Koumoto, T. Takata, T. Kasami and S. Lin, "The Least Stringent Sufficient Condition on the Optimality of a Suboptimally Decoded Codeword Using the Most Reliable Basis," Proceedings of the 1997 IEEE International Symposium on Information Theory, p. 430, Ulm, Germany, June 1997.
• T. Koumoto and T. Kasami, "Analysis and Improvement on GMD like Decoding Algorithms," Proceedings of the International Symposium on Information Theory and Its Applications, pp. 419-422, Mexico City, Mexico, October 1998.
• H. Tokushige, T. Koumoto and T. Kasami, "An Improvement to GMD-like Decoding Algorithms," Proceedings of the 2000 IEEE International Symposium on Information Theory, p. 396, Sorrento, Italy, June 2000.
• H. Tokushige, Y. Tang, T. Koumoto and T. Kasami, "An Improvement to Chase-like Decoding Algorithm," Proceedings of the International Symposium on Information Theory and Its Applications, pp. 331-334, Honolulu, USA, November 2000.
• J. Asatani, T. Koumoto, K. Tomita and T. Kasami, "A Reduced Complexity Soft-decision Iterative Decoding of Reed-Muller Codes Based on A Suboptimal Minimum Distance Search," Proceedings of the International Symposium on Information Theory and Its Applications, pp. 139-142, Xi'an, China, October 2002.
• T. Koumoto, and T. Kasami, "Top-down Recursive Maximum Likelihood Decoding Using Ordered Statistic Information," Proceedings of the IEEE Information Theory Workshop, p. 202, Bangalore, India, October 2002.
• J. Asatani, T. Koumoto, T. Fujiwara and T. Kasami, "Soft-Input Soft-Output Decoding Algorithm of Linear Block Codes Based on Minimum Distance Search," Proceedings of the 2004 IEEE International Symposium on Information Theory, p. 345, Chicago, USA, June 2004.
• J. Asatani, T. Koumoto, T. Fujiwara and T. Kasami, "Method for Generating a Competing Codeword Using a Chain of Minimum Distance Searches," Proceedings of the International Symposium on Information Theory and Its Applications, pp. 260-264, Seoul, Korea, October 2006.
• R. Yokoyama, T. Kusaka and T. Fujiwara, "Adaptive Recursive MLD Using Ordered Statistics for Low Rate Codes," Proceedings of the International Symposium on Information Theory and Its Applications, pp. 772-777, Taichung, Taiwan, October 2010.
• T. Masuno, T. Kusaka and T. Fujiwara, "A New Method to Reduce the Probability of Detection Errors for a Digital Watermark Using Complementary Decoding Algorithms and Minimum Weight Codewords of Linear Code," Proceedings of the International Symposium on Information Theory and Its Applications, pp. 326-331, Taichung, Taiwan, October 2010.
• T. Kusaka, R. Yokoyama and T. Fujiwara, "A Soft-Decision Sphere Decoding based on the Recursive Vector Generator," Proceedings of the International Symposium on Information Theory and Its Applications, pp. 111-115, Honolulu, USA, October 2012.
• T. Kusaka, "Introduction of a Recursive Method for Specific Weight Binary Vector Generation in Decreasing Order of its Reliability Measure," Proceedings of the International Symposium on Information Theory and Its Applications, pp. 534-538, Melbourne, Australia, October 2014.
• S. Miyoshi, Y. Nogami, T. Kusaka and N. Yamai, "Solving 94-Bit ECDLP with 70 Computers in Parallel," 17th International Conference on Pairing-Based Cryptography, Vol. 2, No. 8, p. 1257, Paris, France, Augst 2015.
• S. Fujimoto, T. Kusaka and S. Ueda, "A Study on Soft-out of Soft-in/Soft-out Decoding Algorithms for Binary Linear Codes," Proceedings of the International Symposium on Information Theory and Its Applications, pp. 305-309, Monterey, USA, November 2016.

Technical Meetings(without review)

• T. Kasami, T. Takata, T. Koumoto, T. Fujiwara, H. Yamamoto and S. Lin, "The Least Stringent Sufficient Condition on Optimality of a Suboptimal Decoded Codewords," Technical Report of IEICE, IT94-82, The Institute of Electronics, Information and Communication Engineers, pp. 19-24, Japan, January 1995.
• T. Koumoto, H. Nagano, T. Takata, T. Fujiwara, T. Kasami and S. Lin, "A New Iterative Soft-Decision Decoding Algorithm," Technical Report of IEICE, IT94-28, The Institute of Electronics, Information and Communication Engineers, pp. 19-24, Japan, July 1995.
• T. Koumoto, H. Nagano, T. Takata, T. Fujiwara, T. Kasami and S. Lin, "An Iterative Soft-Decision Decoding Algorithm," Proceedings of the 18th Symposium on Information Theory and Its Applications, pp. 557-560, Japan, December 1995.
• T. Koumoto, T. Takata, T. Kasami and S. Lin, "Condition for Reducing the Number of Iterations of Iterative Decoding," Technical Report of IEICE, IT95-73, The Institute of Electronics, Information and Communication Engineers, pp. 25-30, Japan, March 1996.
• T. Koumoto and T. Kasami, "An Iterative Decoding Algorithm Based on Information of Decoding Failure," Proceedings of the 20th Symposium on Information Theory and Its Applications, pp. 325-328, Japan, December 1997.
• T. Koumoto and T. Kasami, "Analysis and Improvement on GMD like Decoding Algorithms," Technical Report of IEICE, IT98-54, The Institute of Electronics, Information and Communication Engineers, pp. 53-58, Japan, May 1998.
• T. Koumoto and T. Kasami, "Analysis and Improvement on Chase Type 2 like Decoding Algorithms," Proceedings of the 21st Symposium on Information Theory and Its Applications, pp. 531-534, Japan, December 1998.
• H. Tokusige, T. Koumoto and T. Kasami, "An Improvement to GMD-like Decoding Algorithms," Proceedings of the 22nd Symposium on Information Theory and Its Applications, pp. 645-648, Japan, December 1999.
• H. Tokusige, K. Nakamae, T. Koumoto Y. Tang and T. Kasami, "Selection of Search Centers in Iterative Soft-Decision Decoding Algorithms," Proceedings of the 23rd Symposium on Information Theory and Its Applications, pp. 73-76, Japan, October 2000.
• J. Asatani, K. Tomita, T. Koumoto, T. Takata and T. Kasami, "A New Iterative Soft-Decision Decoding Algorithm Using List Decoding of Minimum Weight Sub-trellis Search," Technical Report of IEICE, IT2000-49, The Institute of Electronics, Information and Communication Engineers, pp. 9-16, Japan, March 2001.
• H. Tokusige, K. Nakamae, T. Koumoto and T. Kasami, "On Selection of Search Centers of Iterative Bounded-distance Decoding Algorithm," Technical Report of IEICE, IT2000-59, The Institute of Electronics, Information and Communication Engineers, pp. 85-90, Japan, March 2001.
• H. Tokusige, T. Koumoto M. Fossorier and T. Kasami, "A Selection Method of Search Centers in Iteration of Bounded-distance Decodings," Proceedings of the 24th Symposium on Information Theory and Its Applications, pp. 455-458, Japan, December 2001.
• T. Koumoto, and T. Kasami, "Top-down Recursive Maximum Likelihood Decoding Using Ordered Statistic Information," Technical Report of IEICE, IT2001-75, The Institute of Electronics, Information and Communication Engineers, pp. 17-22, Japan, March 2002.
• J. Asatani, K. Tomita, T. Koumoto, T. Takata and T. Kasami, "A Soft-Decision Iterative Decoding Algorithm Using a Top-Down and Recursive Minimum Distance Search," Technical Report of IEICE, IT2001-77, The Institute of Electronics, Information and Communication Engineers, pp. 7-10, Japan, March 2002.
• T. Koumoto, and T. Kasami, "Top-down Recursive Maximum Likelihood Decoding Using Ordered Statistic Information for Half Rate Codes," Technical Report of IEICE, IT2002-29, The Institute of Electronics, Information and Communication Engineers, pp. 13-18, Japan, September 2002.
• T. Kasami, T. Fujiwara, Y. Kaji and T. Koumoto, "Adaptive Recursive Maximum Likelihood Decoding Based on Parallel Concatination Decomposition," Technical Report of IEICE, IT2002-66, The Institute of Electronics, Information and Communication Engineers, pp. 109-114, Japan, March 2003.
• J. Asatani, T. Koumoto, K. Tomita and T. Kasami, "Reduced Complexity Iterative Decoding Using a Sub-optimum Minimum Distance Search," Technical Report of IEICE, IT2002-67, The Institute of Electronics, Information and Communication Engineers, pp. 115-120, Japan, March 2003.
• T. Koumoto, Y. Kaji, T. Fujiwara and T. Kasami, "Implementation and Simulation Results of Adaptive Recursive Maximum Likelihood Decoding," Technical Report of IEICE, IT2003-28, The Institute of Electronics, Information and Communication Engineers, pp. 29-32, Japan, July 2003.
• J. Asatani, T. Koumoto, T. Fujiwara and T. Kasami, "Soft-Input Soft-Output Decoding Algorithm Based on Iterative Minimum Distance Search for Reed-Muller Codes," Proceedings of the 26th Symposium on Information Theory and Its Applications, pp. 1-4, Japan, December 2003.
• T. Koumoto, Y. Kaji, T. Fujiwara and T. Kasami, "Adaptive Recursive Maximum Likelihood Decoding Based on the Coarsest Parallel Concatination Decomposition--Evaluation of the Decoding Complexity by Simulation," Proceedings of the 26th Symposium on Information Theory and Its Applications, pp. 5-8, Japan, December 2003.
• J. Asatani, T. Koumoto, T. Fujiwara and T. Kasami, "Soft-Input Soft-Output Decoding Algorithm Using a Structure of the Set of Minimum Weight Codewords of Reed-Muller Codes," Technical Report of IEICE, IT2003-93, The Institute of Electronics, Information and Communication Engineers, pp. 115-120, Japan, March 2004.
• M. Isogai, N. Funabiki, T. Koumoto, Y. Sugiyama, R. Ozaki and T. Okamoto, "A Proposal of a Panoramic Image Synthesizing Algorithm Using an Optimization Method(in Japanese)," Technical Report of IEICE, SIS2004-53, The Institute of Electronics, Information and Communication Engineers, pp. 17-24, Japan, December 2004.
• Y. Shimizu, T. Koumoto, R. Ozaki, Y. Sugiyama and T. Okamoto, "Study on Making Highly Effective Perspective Transform Applies the Technology of Video Compressing(in Japanese)," Technical Report of IEICE, SIS2005-25, The Institute of Electronics, Information and Communication Engineers, pp. 13-18, Japan, September 2005.
• J. Asatani, T. Koumoto, T. Fujiwara and T. Kasami, "The structure of the set of minimum weight codewords of the extended (32,21,6) and (64,45,8) BCH codes," Proceedings of the 28th Symposium on Information Theory and Its Applications, pp. 439-442, Japan, November 2005.
• M. Saito, M. Isogai, T. Koumoto and N. Funabiki, "A Development of PeerCast-Based Multimedia Distribution System PeerStream and Its Evaluations(in Japanese)," Technical Report of IEICE, NS2005-151, The Institute of Electronics, Information and Communication Engineers, pp. 5-8, Japan, January 2006.
• K. Matsumoto, H. Kagotani, T. Koumoto and N. Funabiki, "A Proposal of Proxy for Load Dispersion and Access Control in VNC System(in Japanese)," Technical Report of IEICE, NS2006-35, The Institute of Electronics, Information and Communication Engineers, pp. 57-60, Japan, May 2006.
• J. Asatani, T. Koumoto, T. Fujiwara and T. Kasami, "Structural Analysis of Minimum Weight Codewords of the Extended (32,21,6) and (64,45,8) BCH Codes Using Invariance Property," Technical Report of IEICE, IT2006-5, The Institute of Electronics, Information and Communication Engineers, pp. 25-30, Japan, May 2006. Also, in Proceedings of 2006 Hawaii, IEICE and SITA Joint Conference on Information Theory.
• Y. Yasukawa, T. Koumoto, N. Funabiki and Y. Sugiyama, "Research on Making of Electronic Whiteboard Secure(in Japanese)," Technical Report of IEICE, SIS2006-24, The Institute of Electronics, Information and Communication Engineers, pp. 7-12, Japan, September 2006.
• M. Saito, T Koumoto and Y. Sugiyama, "A development of a software which provides high mobility to Windows programs with API Hook(in Japanese)," Technical Report of IEICE, SS2006-53, The Institute of Electronics, Information and Communication Engineers, pp.25 -30, Japan, October 2006.
• K. Matsumoto, H. Kagotani, T. Koumoto and N. Funabiki, "Experimental Evaluations of Network Load Dispersion Effects by VNC Proxy(in Japanese)," Technical Report of IEICE, NS2006-132, The Institute of Electronics, Information and Communication Engineers, pp. 51-54, Japan, November 2006.
• K. Yasuhara, T. Koumoto, N. Funabiki and Y. Sugiyama, "An Implementation of a Connection Switching Function for Dynamic Routing in PeerCast(in Japanese)," Technical Report of IEICE, NS2007-19, The Institute of Electronics, Information and Communication Engineers, pp. 27-32, Japan, May 2007.
• T. Koumoto, "(Invited Lecture)Soft-Decision Decoding for Linear Codes: The Quest to Maximum Likelihood Decoding(in Japanese)," Technical Report of IEICE, IT2007-24, The Institute of Electronics, Information and Communication Engineers, pp. 27-32, Japan, November 2007.
• Y. Sunano, N. Kato and T. Koumoto, "Implementation of a Proxy to use Electronic Whiteboard on VMware Player(in Japanese)," Technical Report of IEICE, NS2008-25, The Institute of Electronics, Information and Communication Engineers, pp. 47-52, Japan, June 2008.
• N. Kato, Y. Sunano and T. Koumoto, "Design and Implementation of the Reliable Multicast Delivery for Middleware of Electronic WhiteBoard Systemd(in Japanese)," Technical Report of IEICE, NS2008-36, The Institute of Electronics, Information and Communication Engineers, pp. 61-66, Japan, July 2008.
• K. Yasuhara and T. Koumoto, "Design and Implementation of Dynamic Autonomous Distributed Connection Switching Function in PeerCast(in Japanese)," Technical Report of IEICE, NS2008-69, The Institute of Electronics, Information and Communication Engineers, pp. 7-12, Japan, October 2008.
• N. Kato, Y. Sunano and T. Kusaka, "Study on Extension of Reliable Multicast Middleware(in Japanese)," Technical Report of IEICE, NS2008-109, The Institute of Electronics, Information and Communication Engineers, pp. 7-12, Japan, December 2008.
• T. Masuno, T. Kusaka and T. Fujiwara, "Performance Evaluation and Analysis on Digital Watermark for Still Images with JPEG Compression Attack(in Japanese)," Technical Report of IEICE, IT2009-14, The Institute of Electronics, Information and Communication Engineers, pp. 49-54, Japan, July 2009.
• T. Masuno, T. Kusaka and T. Fujiwara, "Study on Method of Calculation on Soft-decision Sequence on Digital Watermark with Soft-decision Decoding(in Japanese)," Proceedings of the 32nd Symposium on Information Theory and Its Applications, pp. 346-350, Japan, December 2009.
• T. Kusaka, R. Yokoyama and T. Fujiwara, "Adaptive Recursive Maximum Likelihood Decoding Using Ordered Statistics for High Rate Codes," Proceedings of the 33rd Symposium on Information Theory and Its Applications, pp. 541-546, Japan, December 2010.
• T. Kusaka, T. Masuno and T. Fujiwara, "An Improved Method to Reduce the Probability of Detection Errors for a Digital Watermark Using Complementary Soft-Decision Decoding Algorithms for Linear Codes," Proceedings of the 33rd Symposium on Information Theory and Its Applications, pp. 547-552, Japan, December 2010.
• T. Kusaka and T. Fujiwara, "Introduction of a Recursive Method on Vector Generation in Decreasing Order of Its Likelihood for Set of All Binary Vectors," Proceedings of the 33rd Symposium on Information Theory and Its Applications, pp. 536-540, Japan, December 2010.
• R. Yokoyama and T. Kusaka, "A New Max-Log-MAP Decoding Using Recursive Vector Generators and Ordered Statistics for Self-Dual Codes," Proceedings of the 34th Symposium on Information Theory and Its Applications, pp. 275-280, Japan, December 2011.
• T. Kusaka and T. Kikumoto, "Improvement on Block Turbo Decoding of SISO-OSD for Two Dimensional Product Code(in Japanese)," Technical Report of IEICE, IT2013-6, The Institute of Electronics, Information and Communication Engineers, pp. 23-28, Japan, May 2013.
• T. Kusaka, T. Masuno and T. Fujiwara, "Methods to Reduce the Rate of Decoding Errors for Digital Watermarking Using an Error Correcting Code," Technical Report of IEICE, IT2013-17, The Institute of Electronics, Information and Communication Engineers, pp. 33-38, Japan, July 2013.
• T. Kusaka, T. Fujiwara and R. Yokoyama, "A Soft-Decision Sphere Decoding Based on a Recursive Vector Generator Using Euclidian Distance," Technical Report of IEICE, IT2013-33, The Institute of Electronics, Information and Communication Engineers, pp. 7-11, Japan, September 2013.
• Y. Kono, Y. Nogami and T. Kusaka, "Accelerating Random Walk with Associative Rational Points(in Japanese)," Proceedings of the 36th Symposium on Information Theory and Its Applications, pp. 55-59, Japan, November 2013.
• T. Kusaka, Y. Nogami and Y. Kono, "An Implementation on Pollard's Rho Method Style Attack on G1 over BN Curves up to 71-bits Primes(in Japanese)," Proceedings of the 36th Symposium on Information Theory and Its Applications, pp. 60-65, Japan, November 2013.
• T. Kusaka, "A Max-Log-MAP Decoding Using a Recursive Vector Generator for Binary Linear Codes," Technical Report of IEICE, IT2013-66, The Institute of Electronics, Information and Communication Engineers, pp. 77-80, Japan, March 2014.
• S. Fujimoto and T. Kusaka, "Study on Soft-out of SISO Decodings for Binary Linear Codes(in Japanese)," Technical Report of IEICE, IT2014-60, The Institute of Electronics, Information and Communication Engineers, pp. 35-39, Japan, January 2015.