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Papers (refereed)

  1. Takafumi Nakano and Tadashi Wadayama, ``On Zero Error Capacity of Nearest Neighbor Error Channels with Multilevel Alphabet,'' IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E100.A, No. 12, to appear (2017)

  2. Yoju Fujino and Tadashi Wadayama, ``Construction of Fixed Rate Non-Binary WOM Code based on Integer Programming,'' IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E100.A, No. 12, to appear (2017)

  3. Takashiro Oshima and Tadashi Wadayama, ``Index ARQ Protocol for Reliable Contents Distribution over Broadcast Channels,'' IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E100.A, No. 3, pp. 832-838 (2017)

  4. Hiroki Mori and Tadashi Wadayama, ``Band Splitting Permutations for Spatially Coupled LDPC Codes Achieving Asymptotically Optimal Burst Erasure Immunity,'' IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E100.A,No. 2, pp. 663-669 (2017)

  5. Tadashi Wadayama, ``Non-Adaptive Group Testing based on Sparse Pooling Graphs,'' IEEE Trans. Inform. Theory, VOL. 63, NO. 3, pp.1525-1534 (2017)

  6. Hiroki Mori, Tadashi Wadayama, ``Performance Analysis based on Density Evolution on Fault Erasure Belief Propagation Decoder,'' IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E99.A, No. 12, pp. 2155-2161 (2016)

  7. Tadashi Wadayama, Taisuke Izumi, and Kazushi Mimura, ``Bitwise MAP Estimation for Group Testing based on Holographic Transformation, '' IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E99.A, No. 12, pp. 2147-2154 (2016)

  8. Akiyuki Yano, Tadashi Wadayama, ``Probabilistic Analysis of the Network Reliability Problem on Random Graph Ensembles, '' IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E99.A, No. 12, pp. 2218-2225 (2016)

  9. Daichi Yugawa, Tadashi Wadayama, ``Finite Length Analysis on Listing Failure Probability of Invertible Bloom Lookup Tables,'' IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol.E97-A, No.12, pp.2309-2316 (2014)

  10. Yuki Fujii, Tadashi Wadayama ``Probabilistic Analysis on Minimum s-t Cut Capacity of Random Graphs with Specified Degree Distribution,'' IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences Vol. E97.A (2014) No. 12 pp. 2317-2324 (2014)

  11. Tadashi Wadayama, ``A Review of Decoding Algorithm for LDPC Codes Based on Numerical Optimization Techniques (in Japanese)'', Prodeedings of the Institute of Statistical Mathmatics, vol.61-1, pp.123-134 (2013)

  12. Yusuke Kimata and Tadashi Wadayama, ``A burst error correction algorithm for non-binary LDPC codes (in Japanese)'', IEICE Transactions on Fundamentals A Vol.J96-A No.3 pp.117-124 (2013)

  13. Tadashi Wadayama, Manabu Hagiwara, ``LP Decodable Permutation Codes based on Linearly Constrained Permutation Matrices,'' IEEE Trans. Inform. Theory, pp.5454-5470, vol.58, no.6, Aug. (2012)

  14. Riki Suzuki, Tadashi Wadayama, ``Modified Index-less Indexed Flash Codes for Improving Average Performance (in Japanese),'' IEICE Transactions on Fundamentals, Vol.J94-A No.12, pp.991-1000, (2011)

  15. Shingo Ito, Tadashi Wadayama, ``Multiuser Detection Algorithms for Synchronous CDMA Based on Quadratic Programming (in Japanese),'' IEICE Transactions on Fundamentals, Vol. J94-A, No.8, 649-656, (2011)

  16. Tadashi Wadayama, ``Interior Point Decoding for Linear Vector Channels based on Convex Optimization,'' IEEE Trans. Inform. Theory, pp.4905-4921, vol.56, no.10, Oct. (2010)

  17. Tadashi Wadayama, Keisuke Nakamura, Masayuki Yagita, Yuuki Funahashi, Shogo Usami, Ichi Takumi, ``Gradient Descent Bit Flipping Algorithms for Decoding LDPC Codes'', IEEE Trans. Comm., pp.1610-1614, vol.58, no.6, June (2010)

  18. Tadashi Wadayama, ``On Undetected Error Probability of Binary Matrix Ensembles'' IEEE Trans. Inform. Theory, pp.2168-2176, vol.56, no. 5, May (2010)

  19. Yoshiyuki Kabashima, Tadashi Wadayama, Toshiyuki Tanaka, ``A Typical Reconstruction Limit for Compressed Sensing based on Lp-Norm Minimization'', Jounal of Statistical Mechanics: Theory and Experiment,L09003,http://www.iop.org/EJ/abstract/1742-5468/2009/09/L09003, (2009)

  20. Makoto Miwa, Tadashi Wadayama, Ichi Takumi, ``A Cutting-Plane Method based on Redundant Rows for Improving Fractional Distance'', IEEE Journal on Selected Areas in Communications,pp.1005-1012, vol.27, no.6, Aug. (2009) .

  21. Tadashi Wadayama, "Average Stopping Set Weight Distributions of Redundant Random Ensembles", IEEE Trans. Inform. Theory, pp.4991-5004,vol.54,no.11,Nov (2008).

  22. Tadashi Wadayama, "Average Coset Weight Distribution of Combined LDPC Matrix Ensembles", IEEE Trans. Inform. Theory, pp.4856- 4866,vol.52,no.11,Nov (2006).

  23. J. Muramatsu, T.Uyematsu, T. Wadayama, "Low-Density Parity-Check Matrices for Coding of Correlated Sources", IEEE Trans. Inform. Theory, pp. 3645- 3654, vol.51, no.10, Oct (2005).

  24. Tadashi Wadayama, "Average Coset Weight Distributions of Gallager's LDPC Code Ensemble," IEEE Trans. Inform. Theory, pp.2715- 2721, vol.51,no.7, July (2005).

  25. Tadashi Wadayama, "Iterative decoding algorithm for channel with burst errors," IEICE Transactions on Fundamentals, vol.J88-D-II, no.2, pp.170-187 (2005).

  26. Takashi Ishida, Tadashi Wadayama, "A construction of regular LDPC codes based on monomials and constant weight vectors," IEICE Transactions on Fundamentals, vol.J87-A, no.11, pp.1457-1459 (2004).

  27. Tadashi Wadayama, "An algorithm for calculating the exact bit error probability of a binary linear code over the binary symmetric channel," IEEE Trans. Inform. Theory, pp.331-337, vol.50, no.2, Feb. (2004)

  28. Tadashi Wadayama ``An iterative decoding algorithm for channels with additive linear dynamical noise'' IEICE Transactions on Fundamentals, vol.E86-A, no.10, pp.2452-2460, October (2003).

  29. Tadashi Wadayama, Hiroyuki Kadokawa, ``An algorithm for augmenting a binary linear code up to Gilbert bound and new codes obtained by the algorithm,'' IEICE Transactions on Fundamentals, vol.E85-A, no.10, pp.2196-2202, October (2002).

  30. Yoshimichi Komori, Tadashi Wadayama, "A (d,k)-constraint coding technique based on prefix codes," IEICE Transactions on Fundamentals, vol.J85-A, no.8, pp.847-854 (2002).

  31. Tadashi Wadayama, ``An extension of Gallager ensemble of low density parity check codes,'' IEICE Transactions on Fundamentals, pp.1161-1171, May (2002).

  32. Tadashi Wadayama and A.J. Han Vinck, "DC-free convolutional coding," IEEE Trans. Inform. Theory, vol.48, no.1, pp.162-173, Jan. (2002).

  33. Tadashi Wadayama, "An algorithm for computing rejection probability of MLD with threshold test over BSC," Springer Lecture notes in computer science (2001).

  34. Yusuke Fujita, Tadashi Wadayama, "An Algorithm for computing complete coset weight distribution of binary linear codes," (in Japanese), IEICE Transactions (Engineering science),Vol.J84-A, No.6, pp.840-847 (2001).

  35. Tadashi Wadayama, Toru Hada,Koichiro Wakasugi and Masao Kasahara, "Upper and lower bounds on maximum nonlinearity of $n$-input $m$-output Boolean function,'' Designes, Codes, and Cryptography, Kluwer Academic Publishers, pp.23 - 34, Vol.23, May (2001).

  36. Tadashi Wadayama, Mariko Chiku, "On a greedy algorithm for generating ordered basis and linear codes generated by the algorithm," (in Japanese) IEICE Transactions (Engineering science), vol.J84-A, No.1, pp.84--89 (Jan. 2001).

  37. The english version of the paper ``A combining method of error correcting code and runlength limited code for reducing error propagation,'' will be published in Electronics and Communications in Japan Part 3. (John Wiley & Sons has translated it into English.) John Wiley & Sons (2001).

  38. Tadashi Wadayama, "A coded modulation scheme based on low density parity check codes," IEICE Transactions on Fundamentals, vol.E84-A, no.10, pp.2523-2527 (2001).

  39. Tadashi Wadayama and A.J.Han Vinck, "A multilevel construction of permutation codes," IEICE Transactions on Fundamentals, vol.E84-A, no.10, pp.2518-2522 (2001).

  40. Tadamitsu Hirai, Tadashi Wadayama and Yorsiharu Yuba, ``A combining method of error correcting code and runlength limited code for reducing error propagation(in Japanese),'' IEICE Transactions, vol.J82-A, no.2, pp.267-272, (1999).

  41. Tadashi Wadayama, Koichiro Wakasugi, Masao Kasahara: ``An upper bound on frame error rate for generalized concatenated convolutional code,'' IEICE Transactions on Fundamentals, vol.E82-A, no.6, pp.1126-1130, June (1999).

  42. Tadashi Wadayama, Naohiro Kimura, Koichiro Wakasugi, Masao Kasahara: ``Construction of Binary Trellis-Codes for Interference Channel,'' IEICE Trans. vol.J81-A, no.10, pp.1476-1479, October (1998).

  43. Tadashi Wadayama, Koichro Wakasugi and Masao Kasahara, ``A method for evaluating minimum free Chernov distance of trellis-codes for discrete memoryless channel,'' IEICE Transactions (Engineering science), vol.E81-A, no.10, pp.1972-1978, October (1998).

  44. Tadashi Wadayama, Koichro Wakasugi and Masao Kasahara, ``An upper bound on bit error rate for concatenated convolutional code,'' IEICE Transactions on Fundamentals, vol.E80-A, no.11, pp.2123-2129, November (1997).

  45. Tadashi Wadayama, Yutaka Tokuda, Yoshiharu Yuba: ``A multiple burst correction algorithm for q-ary interleaved block code and its correction capability(in Japanese),'' IEICE Trans. Fundamentals A,vol.J80-A, no.12, pp.2173-2176, December (1997).

  46. Tadashi Wadayama, Koichro Wakasugi and Masao Kasahara, ``On weight distribution for Euclidean image of binary linear codes,'' Memoirs of the Faculty of Engineering and Design, Kyoto Institute of Technology 45, pp.43-54, March (1997).

  47. Tadashi Wadayama, Atsushi Nagao, Koichro Wakasugi and Masao Kasahara, ``A class of trellis-codes for partial response channel,'' IEICE Transactions on Fundamentals, vol.E80-A,no.2, pp.386-392 (1997).

  48. Takeshi Katou, Tadashi Wadayama, Koichro Wakasugi and Masao Kasahara: ``A Maximum Likelihood Decoding Algorithm with Block Reliability Output and Its Applications(in Japanese),'' IEICE Trans. Commun. BI, vol.J80-B-I, no.10, pp.792-795, October (1997).

  49. Tadashi Wadayama, Koichro Wakasugi and Masao Kasahara, ``Matched design method for concatenated trellis-coded modulation,'' IEICE Transactions on Fundamentals, vol.E79-A,no.11, pp.1911-1917 (1996).

  50. Tadashi Wadayama, Koichro Wakasugi and Masao Kasahara, ``High rate binary coset code used for inner code,'' IEICE Transactions on Fundamentals, vol.E78-A, no.9, pp.1071-1076, September (1995).

  51. Tadashi Wadayama, Koichro Wakasugi and Masao Kasahara, ``Multi-dimensional block shaping,'' IEICE Transactions on Fundamentals, vol.E78-A, no.8, pp.1034-1041, August (1995).

  52. Tadashi Wadayama, Koichro Wakasugi and Masao Kasahara, ``An 8-dimensional trellis-coded 8-PSK with non-zero crossing constraint,'' IEICE Trans. on Fundamentals, VOL.E77-A,pp.1274-1280 (1994).

  53. Tadashi Wadayama, Koichro Wakasugi and Masao Kasahara, ``Construction of maximum average weight codes for nonequiprobable signal point selection,''(In Japanese), IEICE Trans., VOL.J75-A,pp.1282-1289 (1992).

International Conference

  1. Takayuki Nozaki, Takafumi Nakano, and Tadashi Wadayama ``Analysis of Breakdown Probability of Wireless Sensor Networks with Unreliable Relay Nodes,'' IEEE International Symposium on Information Theory, (2017).

  2. Takafumi Nakano, Tadashi Wadayama, ``On Zero Error Capacity of Nearest Neighbor Error Channels with Multilevel Alphabet,'' International Symposium on Information Theory and Its Applications (ISITA) (2016)

  3. Yoju Fujino, Tadashi Wadayama, ``A Construction of Non-Binary WOM Codes based on Integer Programming, '' International Symposium on Information Theory and Its Applications (ISITA) (2016)

  4. Shinya Fukumoto, Tadashi Wadayama, ``Iterative Erasure Correcting Algorithm for q-ary Reed-Muller Codes based on Local Correctability,'' International Symposium on Turbo Codes and Iterative Information Processing, Brest (2016)

  5. Hiroki Mori, Tadashi Wadayama, ``Performance analysis of fault erasure belief propagation decoder based on density evolution,'' IEEE International Symposium on Information Theory, Barcelona, June (2016).

  6. Tadashi Wadayama, Taisuke Izumi, ``Bounds on asymptotic rate of capasitive crosstalk avoidance codes for on-chip buses, '' IEEE International Symposium on Information Theory, Barcelona, June (2016).

  7. Tadashi Wadayama, ``Evaluation of symmetric mutual information of the simplified TDMR channel model, '' IEEE Globecom, San Diego, Dec. (2015)

  8. Tadashi Wadahyama, (Invited) ``Coding and combinatorial optimization,'' IEEE Seminar on Future Directions in Information Theory and Communications, South Africa, 16-21 August, (2015)

  9. Tadashi Wadayama, Taisuke Izumi and Hirotaka Ono, ``Subgraph domatic problem and writing capacity of devices with restricted state transitions,'' IEEE International Symposium on Information Theory, Hong Kong, June (2015).

  10. Tadashi Wadayama, Taisuke Izumi and Kazushi Mimura, ``Bitwise MAP estimation for group testing based on holographic transformation,'' IEEE International Symposium on Information Theory, Hong Kong, June (2015).

  11. Tadashi Wadayama, ``An Analysis on Non-Adaptive Group Testing based on Sparse Pooling Graphs'', IEEE International Symposium on Information Theory (ISIT2013), Istanbul (2013)

  12. Yuki Fujii, Tadashi Wadayama, ``An Analysis on Minimum s-t Cut Capacity of Random Graphs with Specified Degree Distribution'', IEEE International Symposium on Information Theory (ISIT2013), Istanbul (2013)

  13. Daichi Yugawa, Tadashi Wadayama, ``Finite Length Analysis on Listing Failure Probability of Invertible Bloom Lookup Tables'', IEEE International Symposium on Information Theory (ISIT2013), Istanbul (2013)

  14. Akiyuki Yano and Tadashi Wadayama, Probabilistic analysis of the network reliability problem on a random graph ensemble, International Symposiumm on Information Theory and Its Applications (ISITA 2012), Honolulu (2012)

  15. Yuki Fujii and Tadashi Wadayama, A coding theoretic approach for evaluating accumulate distribution on minimum cut capacity of weighted random graphs, International Symposiumm on Information Theory and Its Applications (ISITA 2012), Honolulu (2012)

  16. Kazushi Mimura, Tadashi Wadayama,and Yoshiyuki Kabashima, Average growth rate of low-density generator-matrix codes ensembles, International Symposiumm on Information Theory and Its Applications (ISITA 2012), Honolulu (2012)

  17. Taisuke Izumi and Tadashi Wadayama, A new direction for counting perfect matchings, Annual IEEE Symposium on Foundations of Computer Science (FOCS 2012), New Brunswick (2012)

  18. Tadashi Wadayama and Manabu Hagiwara, LP decodable permutation codes baased on linearly constrained permutation matrices, Proceedings of IEEE International Symposium on Information Theory (ISIT2011), St.Pertersburg (2011)

  19. Kazushi Mimura, Tadashi Wadayama, Toshiyuki Tanaka, and Yoshiyuki Kabashima, Average error exponent of undetected error probability of binary matrix ensembles, Proceedings of IEEE International Symposium on Information Theory (ISIT2011), St.Pertersburg (2011)

  20. Riki Suzuki and Tadashi Wadayama, Layered index-less indexed flash codes for improving average performance, Proceedings of IEEE International Symposium on Information Theory (ISIT2011), St.Pertersburg (2011)

  21. Yoshiyuki Kabashima, Tadashi Wadayama, Toshiyuki Tanaka, Statistical mechanical analysis of a typical reconstruction limit of compressed sensing, Proceedings of IEEE International Symposium on Information Theory (ISIT2010), Austin (2010)

  22. Tadashi Wadayama, "On random construction of bipolar sensing matrix with compact representation" in Proceedings of IEEE Information Theory workshop (Taormina, Sicily, Italy) (2009)

  23. Tadashi Wadayama, "An LP decoding algorithm based on primal path-following interior point method",Proceedings of IEEE International Symposium on Information Theory (ISIT2009), Seoul (2009)

  24. Tadashi Wadayama, Keisuke Nakamura, Masayuki Yagita, Yuuki Funahashi, Shogo Usami, Ichi Takumi, "Gradient descent bit flipping algorithms for decoding LDPC codes" in Proceedings of International Symposium on Information Theory and Its Applications , Auckland (2008).

  25. Makoto Miwa, Tadashi Wadayama, Ichi Takumi,"A cutting plane method based on redundant rows for improving fractional distance", in Proceedings of International Symposium on Turbo coding & Related Topics, Lausanne (2008).

  26. Tadashi Wadayama, "Interior Point Decoding for Linear Vector Channels based on Convex Optimization",in Proceedings of IEEE International Symposium on Information Theory (ISIT2008), Toronto (2008).

  27. Tadashi Wadayama, "On Undetected Error Probability of Binary Matrix Ensembles",in Proceedings of IEEE International Symposium on Information Theory (ISIT2008), Toronto (2008).

  28. Tadashi Wadayama, "Interior point decoing for linear vector channels," in Proceedings of International Workshop on Statistical-Mechanical Informatics 2007, Kyoto (2007)

  29. Tadashi Wadayama, "Average Stopping Set Weight Distribution of Redundant Random Matrix Ensembles," , in Proceedings of IEEE International Symposium on Information Theory (ISIT2007), Nice (2007).

  30. Tadashi Wadayama," On undetected error probability of binary matrix ensembles", Information Theory and Applications(ITA) workshop(UCSD), Jan.2007.

  31. Tadashi Wadayama, "Ensemble analysis on syndrome entropy of binary linear codes ", in Proceedings of IEEE International Symposium on Information Theory (ISIT2006), Seattle (2006).

  32. Tadashi Wadayama, ``Ensemble Analysis on Minimum Span of Stopping Sets'', presented at Information Theory and Its Applications Workshop (UCSD) Feb.7, 2006.

  33. Tadashi Wadayama, "An authentication scheme based on an LDPC Matrix", in Proceedings of IEEE International Symposium on Information Theory (ISIT2005), Adelaide (2005).

  34. Tadsahi Wadayama, "A lossy compression algorithm using an LDPC code for bianry iid sources", presented at 3rd International Symposium on Turbo Codes and Relatd Topics, Brest, September, (2003).

  35. Tadashi Wadayama, "A lossy compression algorithm for discrete memoryless sources based on LDPC codes," Asia-Europe Workshop on Information Theory, Kamogata, June (2003).

  36. Tadashi Wadayama, "An iterative decoding algorithm for channels with Gibbs distributed noise," in Proceedings of IEEE International Symposium on Information Theory (ISIT2003), Yokohama (2003).

  37. Jun Muramatsu, Tomohiko Uyematsu, Tadashi Wadayama, "Low density parity check matrices for coding of correlated sources", in Proceedings of IEEE International Symposium on Information Theory (ISIT2003), Yokohama (2003).

  38. Jun Muramatsu, Tomohiko Uyematsu, Tadashi Wadayama, "Low density parity check matrices for coding of multiple access networks", in Proceedings of IEEE Information Theory Workshop (ITW2003), Paris (2003).

  39. Tadashi Wadayama, "An iterative decoding algorithm for channels with colored Gaussian noises," in Proceedings of International Symposium on Information Theory and Its Application (ISITA'2002), Xian, Oct. (2002).

  40. Tadashi Wadayama, ``An algorithm for calculating the exact bit error probability of a binary linear code over the binary symmetric channel,'' ISIT 2002, Lausanne, Switzerland (2002).

  41. Tadashi Wadayama, "An algorithm for computing rejection probability of MLD with threshold test over BSC," in Applied Algebra, Algebraic Algorithms and Error Correcting Codes(AAECC-14) symposium, Melbourne, Australia, Nov. (2001).

  42. Tadashi Wadayama, ``An iterative decoding algorithm of low density parity check codes for hidden markov noise channels,'' in Proceedings of International Symposium on Information Theory and Its Application (ISITA'2000), Hawaii, November (2000).

  43. Tadashi Wadayama, A.J. Han Vinck,"DC-free binary convolutional coding", in Proceedings of IEEE International Symposium on Information Theory (ISIT2000), Sorrento, Italy, p.263,(2000).

  44. A.J. Han Vinck,Juergen Haering, Tadashi Wadayama, "Coded M-FSK for power line communications", in Proceedings of IEEE International Symposium on Information Theory (ISIT2000), Sorrento, Italy, p.137,(2000).

  45. Tadashi Wadayama, Koichro Wakasugi and Masao Kasahara, ``A trellis-based algorithm for computing weight distribution of coset leaders for binary linear codes,'' in Proceedings of International Symposium on Information Theory and Its Application (ISITA'98), Mexico City, Mexico, October (1998).

  46. Tadashi Wadayama, Koichro Wakasugi and Masao Kasahara, ``Binary trellis-codes for two user Gaussian interference channel,'' in Proceedings of International Symposium on Information Theory and Its Applications '96, Victria, Canada, Sep.(1996).

  47. Tadashi Wadayama, Koichro Wakasugi and Masao Kasahara, ``Matched design method for concatenated trellis-coded modulation,'' in Proceedings of International Symposium on Communication '95, Taipei, Taiwan, Dec.(1995).

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