Hiroshi Sawada's Publications (in English)

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Selected Publications

Book Editors
Book Chapters
Tutorials
Journal Publications
Conference Publications

Book Editors

S. Makino, Te-Won Lee, and H. Sawada, Blind Speech Separation, Springer, Sep. 2007.

Book Chapters

H. Sawada, Z. Koldovsky, "Independent Component and Vector Analysis," in Audio Source Separation and Speech Enhancement, E. Vincent, T. Virtanen, and S. Gannot, Eds, Wiley, pp. 263-288, Jul. 2018.
H. Kameoka, H. Sawada, T. Higuchi, "General Formulation of Multichannel Extensions of NMF Variants," in Audio Source Separation, S. Makino, Ed, Springer, pp. 95-124, 2018.
D. Kitamura, N. Ono, H. Sawada, H. Kameoka, H. Saruwatari, "Determined Blind Source Separation with Independent Low-Rank Matrix Analysis," in Audio Source Separation, S. Makino, Ed, Springer, pp. 125-155, 2018.
H. Sawada, S. Araki, S. Makino, "Frequency-Domain Blind Source Separation," in Blind Speech Separation, S. Makino, Te-Won Lee, and H. Sawada, Eds, Springer, pp. 47-78, Sep. 2007.
H. Sawada, R. Mukai, S. Araki, S. Makino, "Frequency-domain blind source separation," in Speech Enhancement, J. Benesty, S. Makino, J. Chen, Eds., Springer, pp. 299-327, Mar. 2005.

Tutorials

N. Ito and H. Sawada, "A Unified Framework for Underdetermined and Determined Blind Audio Source Separation," EUSIPCO 2020, Online, Jan. 2021.
H. Sawada, N. Ono, H. Kameoka, D. Kitamura, "Blind Audio Source Separation on Tensor Representation," ICASSP 2018, Calgary, April 2018. (Slide: PDF)
S. Makino, H. Sawada, "Blind Speech Separation based on Independent Component Analysis and Sparse Component Analysis," Interspeech 2011, Florence, Aug. 2011. (Slide: PDF)
S. Makino, H. Sawada, "Audio Source Separation based on Independent Component Analysis," IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2007), April 2007. (Handout: PDF)

The last three tutorials are listed in IEEE SPS AASP Educational Activities

Journal Publications

H. Sawada, R. Ikeshita, K. Kinoshita, T. Nakatani, "Multi-frame Full-rank Spatial Covariance Analysis for Underdetermined Blind Source Separation and Dereverberation," IEEE/ACM Trans. Audio, Speech, and Language Processing, vol. 31, pp. 3589-3602, 2023, doi: 10.1109/TASLP.2023.3313446. (Paper: PDF, Sample code: https://github.com/nttcslab-sp/mfFCA)
Y.K. Wakabayashi, T. Otsuka, Y. Krockenberger, H. Sawada, Y. Taniyasu, H. Yamamoto, "Stoichiometric growth of SrTiO3 films via Bayesian optimization with adaptive prior mean," APL Machine Learning, vol.1, no.2, 2023. (Paper: Open Access)
K. Niwa, N. Ueda, H. Sawada, A. Fujino, S. Takeda, G. Zhang, W. B. Kleijn, "CoordiNet: Constrained Dynamics Learning for State Coordination Over Graph," IEEE Trans. Signal and Information Processing over Networks, vol.9, pp.242-257, 2023.
Y.K. Wakabayashi, T. Otsuka, Y. Krockenberger, H. Sawada, Y. Taniyasu, H. Yamamoto, "Bayesian optimization with experimental failure for high-throughput materials growth," npj Computational Materials, vol.8, no.1, 2022. (Paper: Open Access)
T. Nakatani, R. Ikeshita, K. Kinoshita, H. Sawada, N. Kamo, S. Araki, "Switching independent vector analysis and its extension to blind and spatially guided convolutional beamforming algorithms," IEEE/ACM Trans. Audio, Speech, and Language Processing, vol.30, pp.1032-1047, 2022.
N. Ito, R. Ikeshita, H. Sawada, T. Nakatani, "A joint diagonalization based efficient approach to underdetermined blind audio source separation using the multichannel Wiener filter," IEEE/ACM Trans. Audio, Speech, and Language Processing, vol.29, pp.1950-1965, 2021.
K. Takiguchi, Y.K. Wakabayashi, H. Irie, Y. Krockenberger, T. Otsuka, H. Sawada, S.A. Nikolaev, H. Das, M. Tanaka, Y. Taniyasu, H. Yamamoto, "Quantum transport evidence of Weyl fermions in an epitaxial ferromagnetic oxide," Nature communications, vol.11, no.1, 2020. (Paper: Open Access)
Y.K. Wakabayashi, T. Otsuka, Y. Krockenberger, H. Sawada, Y. Taniyasu, H. Yamamoto, "Machine-learning-assisted thin-film growth: Bayesian optimization in molecular beam epitaxy of SrRuO3 thin films," APL Materials, vol.7, no.10, 2019. (Paper: Open Access)
H. Sawada, N. Ono, H. Kameoka, D. Kitamura and H. Saruwatari, "A review of blind source separation methods: two converging routes to ILRMA originating from ICA and NMF," APSIPA Transactions on Signal and Information Processing, vol. 8, May 2019. (Paper: Open Access)
M. Kohjima, T. Matsubayashi and H. Sawada, "Learning of Nonnegative Matrix Factorization Models for Inconsistent Resolution Dataset Analysis," IEICE Transactions on Information and Systems, vol. 102, no. 4, Apr. 2019. (Paper: Open Access)
A. Rolet, V. Seguy, M. Blondel and H. Sawada, "Blind source separation with optimal transport non-negative matrix factorization," EURASIP Journal on Advances in Signal Processing, vol. 2018, no. 53, Sep. 2018. (Paper: Open Access)
D. Kitamura, N. Ono, H. Sawada, H. Kameoka, and H. Saruwatari, "Determined blind source separation unifying independent vector analysis and nonnegative matrix factorization," IEEE/ACM Trans. Speech, Audio, and Language Processing, vol.24, no. 9, pp. 1626-1641, Sep. 2016.
T. Otsuka, K. Ishiguro, T. Yoshioka, H. Sawada, and H.G. Okuno, "Multichannel sound source dereverberation and separation for arbitrary number of sources based on bayesian nonparametrics," IEEE/ACM Trans. Audio, Speech, and Language Processing, vol.22, no.12, pp.2218-2232, Dec. 2014.
T. Otsuka, K. Ishiguro, H. Sawada, and H.G. Okuno, "Bayesian nonparametrics for microphone array processing," IEEE/ACM Trans. Audio, Speech, and Language Processing, vol.22, no. 2, pp.493-504, 2014.
M. Souden, S. Araki, K. Kinoshita, T. Nakatani, and H. Sawada, "A multichannel MMSE-based framework for speech source separation and noise reduction," IEEE Trans. Audio, Speech, and Language Processing, vol.21, no.9, pp.1913-1928, 2013.
H. Sawada, H. Kameoka, S. Araki, N. Ueda, "Multichannel Extensions of Non-negative Matrix Factorization with Complex-valued Data," IEEE Trans. Audio, Speech, and Language Processing, vol.21, no.5, pp.971-982, May 2013. (Paper: PDF)
H. Sawada, S. Araki, S. Makino, "Underdetermined Convolutive Blind Source Separation via Frequency Bin-Wise Clustering and Permutation Alignment," IEEE Trans. Audio, Speech, and Language Processing, vol.19, no.3, pp.516-527, March 2011. (Paper: PDF)
H. Sawada, S. Araki, R. Mukai, S. Makino, "Grouping Separated Frequency Components with Estimating Propagation Model Parameters in Frequency-Domain Blind Source Separation," IEEE Trans. Audio, Speech, and Language Processing, vol.15, no.5, pp.1592-1604, July 2007. (Paper: PDF)
S.C. Douglas, M. Gupta, H. Sawada, S. Makino, "Spatio-Temporal FastICA Algorithm for the Blind Separation of Convolutive Mixtures," IEEE Trans. Audio, Speech, and Language Processing, vol.15, no.5, pp.1511-1620, July 2007.
S. Winter, W. Kellermann, H. Sawada, S. Makino, "MAP-Based Underdetermined Blind Source Separation of Convolutive Mixtures by Hierarchical Clustering and l1-Norm Minimization," EURASIP Journal on Advances in Signal Processing, vol.2007, Article ID 24717, 12 pages, 2007. (Paper: PDF)
H. Sawada, S. Araki, R. Mukai, S. Makino, "Blind Extraction of Dominant Target Sources Using ICA and Time-Frequency Masking," IEEE Trans. Audio, Speech, and Language Processing, vol.14, no.6, pp.2165-2173, Nov. 2006 (Paper: PDF)
S. Winter, H. Sawada, S. Makino, "Geometrical Interpretation of the PCA Subspace Approach for Overdetermined Blind Source Separation," EURASIP Journal on Applied Signal Processing, vol.2006, Article ID 71632, 11 pages, 2006. (Paper: PDF)
H. Sawada, R. Mukai, S. Araki, S. Makino, "Estimating the Number of Sources using Independent Component Analysis," Acoustical Science and Technology, the Acoustical Society of Japan, vol.26, no.5, Sep. 2005.
S. C. Douglas, H. Sawada, S. Makino, "Natural Gradient Multichannel Blind Deconvolution and Speech Separation Using Causal FIR Filters," IEEE Trans. Speech and Audio Processing, vol.13, no. 1, pp. 92-104, Jan. 2005.
H. Sawada, R. Mukai, S. Araki, S. Makino, "A Robust and Precise Method for Solving the Permutation Problem of Frequency-Domain Blind Source Separation," IEEE Trans. Speech and Audio Processing, vol.12, no. 5, pp. 530-538, Sep. 2004. (Paper: PDF, Errata)
H. Sawada, R. Mukai, S. Araki, S. Makino, "Convolutive Blind Source Separation for more than Two Sources in the Frequency Domain," Acoustical Science and Technology, the Acoustical Society of Japan, vol.25, no.4, July 2004.
H. Sawada, R. Mukai, S. Araki, S. Makino, "Polar Coordinate based Nonlinear Function for Frequency Domain Blind Source Separation," IEICE Trans. Fundamentals, vol.E86-A, no.3, pp. 590-596, March 2003. (Paper: PDF)
S. Yamashita, H. Sawada and A. Nagoya, "A General Framework to Use Various Decomposition Methods for LUT Network Synthesis," IEICE Trans. Fundamentals, Vol. E84-A, No. 11, pp. 2915-2922, Nov. 2001.
S. Yamashita, H. Sawada and A. Nagoya, "A new notion for functional flexibility: a summary," IEEE Circuits and Systems Magazine, Vol. 2, No. 2, pp. 52-54, 2002.
T. Suyama, M. Yokoo, H. Sawada and A. Nagoya, "Solving satisfiability problems using reconfigurable computing," IEEE Trans. Very Large Scale Integration (VLSI) Systems, Vol. 9, No. 1, pp. 109-116, Feb. 2001.
H. Sawada, S. Yamashita and A. Nagoya, "Efficient Kernel Generation based on Implicit Cube Set Representations and Its Applications," IEICE Trans. Fundamentals, Vol. E83-A, No. 12, pp. 2513-2519, Dec. 2000.
S. Yamashita, H. Sawada and A. Nagoya, "SPFD: A new method to express functional flexibility," IEEE Trans. Computer-Aided Design of Integrated Circuits and Systems, Vol. 19, No. 8, pp. 840-849, Aug. 2000.
H. Sawada, S. Yamashita and A. Nagoya, "Restructuring Logic Representations with Simple Disjunctive Decompositions," IEICE Trans. Fundamentals, Vol. E81-A, No. 12, pp. 2538-2544, Dec. 1998.
S. Yamashita, H. Sawada and A. Nagoya, "An Efficient Method for Finding an Optimal Bi-Decomposition," IEICE Trans. Fundamentals, Vol. E81-A, No. 12, pp. 2529-2537, Dec. 1998.
H. Sawada, T. Suyama and A. Nagoya, "Logic Synthesis for Look-Up Table based FPGAs using Functional Decomposition and Boolean Resubstitution," IEICE Trans. Information and Systems, Vol. E80-D, No. 10, pp. 1017-1023, Oct. 1997.
H. Sawada, Y. Takenaga and S. Yajima, "On the Computational Power of Binary Decision Diagrams," IEICE Trans. Information and Systems, Vol. E77-D, No. 6, pp. 611-618, Jun. 1994.

Conference Publications

H. Sawada, R. Ikeshita, K. Kinoshita, T. Nakatani, "Multi-frame full-rank spatial covariance analysis for underdetermined bss in reverberant environments," IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2022) May, 2022.
K. Aoyama, H. Sawada, "Acceleration method for learning fine-layered optical neural networks," IEEE/ACM International Conference On Computer Aided Design (ICCAD 2021), pp.1-9, Nov. 2021
K. Niwa, G. Zhang, W.B. Kleijn, N. Harada, H. Sawada, A. Fujino, "Asynchronous decentralized optimization with implicit stochastic variance reduction," International Conference on Machine Learning (ICML 2021), pp.8195-8204, Jul., 2021
H. Sawada, K. Aoyama, "Computational Acceleration and Smart Initialization of Full-rank Spatial Covariance Analysis," European Signal Processing Conference (EUSIPCO 2019), Sep., 2019.
H. Sawada, "Similarity Search-based Blind Source Separation," IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2019), pp. 7888-7892, May, 2019.
H. Sawada, "Blind signal separation by synchronized joint diagonalization," International Conference on Latent Variable Analysis and Signal Separation (LVA/ICA 2018), pp. 217-227, Jul., 2018.
H. Sawada, H. Kameoka, S. Araki, N. Ueda, "Efficient Algorithms for Multichannel Extensions of Itakura-Saito Nonnegative Matrix Factorization," IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2012), pp. 261-264, Mar., 2012. (Paper: PDF)
H. Sawada, H. Kameoka, S. Araki, N. Ueda, "New Formulations and Efficient Algorithms for Multichannel NMF," IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA 2011), pp. 153-156, Oct. 2011.
H. Sawada, H. Kameoka, S. Araki, N. Ueda, "Formulations and Algorithms for Multichannel Complex NMF," IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2011), pp. 229-232, May, 2011.
H. Sawada, S. Araki, S. Makino, "A Two-Stage Frequency-Domain Blind Source Separation Method for Underdetermined Convolutive Mixtures," IEEE Workshop on Applications of Signal Processing to Audio and Acoustics (WASPAA 2007), pp. 139-142, Oct. 2007.
E. Vincent, H. Sawada, P. Bofill, S. Makino, J. P. Rosca, "First Stereo Audio Source Separation Evaluation Campaign: Data, Algorithms and Results," Proc. ICA 2007, pp. 552-559, Sep. 2007. (Paper: PDF)
H. Sawada, S. Araki, S. Makino, "MLSP 2007 Data Analysis Competition: Frequency-Domain Blind Source Separation for Convolutive Mixtures of Speech/Audio Signals," IEEE International Workshop on Machine Learning for Signal Processing (MLSP 2007), pp. 45-50, Aug. 2007. (Paper: PDF)
H. Sawada, S. Araki, S. Makino, "Measuring Dependence of Bin-wise Separated Signals for Permutation Alignment in Frequency-domain BSS," IEEE International Symposium on Circuits and Systems (ISCAS 2007), pp. 3247-3250, May 2007.
H. Sawada, S. Araki, R. Mukai, S. Makino, "Blind Separation and Localization of Speeches in a Meeting Situation," Asilomar Conference on Signals, Systems and Computers (Asilomar 2006), pp. 1407-1411, Oct. 2006. (Paper: PDF)
D. Kolossa, H. Sawada, R. F. Astudillo, R. Orglmeister, S. Makino, "Recognition of Convolutive Speech Mixtures by Missing Feature Techniques for ICA," Asilomar Conference on Signals, Systems and Computers (Asilomar 2006), pp. 1397-1401, Oct. 2006.
H. Sawada, S. Araki, R. Mukai, S. Makino, "Solving the Permutation Problem of Frequency-Domain BSS when Spatial Aliasing Occurs with Wide Sensor Spacing," IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2006), vol. V, pp. 77-80, May 2006.
H. Sawada, S. Araki, R. Mukai, S. Makino, "On Calculating the Inverse of Separation Matrix in Frequency-Domain Blind Source Separation," Proc. ICA 2006 (LNCS 3889, © Springer), pp. 691-699, Mar. 2006.
H. Sawada, R. Mukai, S. Araki, S. Makino, "Real-time blind extraction of dominant target sources from many background interferences," International Workshop on Acoustic Echo and Noise Control (IWAENC 2005), Sep. 2005. (Paper: PDF)
H. Sawada, R. Mukai, S. Araki, S. Makino, "Multiple Source Localization using Independent Component Analysis," IEEE AP-S International Symposium and USNC/URSI National Radio Science Meeting (AP-S/URSI 2005), July 2005.
H. Sawada, S. Araki, R. Mukai, S. Makino, "Blind extraction of a dominant source from mixtures of many sources using ICA and time-frequency masking," IEEE International Symposium on Circuits and Systems (ISCAS 2005), pp. 5882-5885, May 2005.
H. Sawada, S. Araki, R. Mukai, S. Makino, "Blind Extraction of a Dominant Source Signal from Mixtures of Many Sources," IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2005), vol. III, pp. 61-64, Mar. 2005.
S. C. Douglas, H. Sawada, S. Makino, "A Spatio-Temporal FastICA Algorithm for Separating Convolutive Mixtures," IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2005), vol. V, pp. 165-168, Mar. 2005.
H. Sawada, R. Mukai, S. Araki, S. Makino, "Frequency-domain Blind Source Separation without Array Geometry Information," Joint Workshop on Hands-Free Speech Communication and Microphone Arrays (HSCMA2005), Mar. 2005.
S. Winter, H. Sawada, S. Araki, S. Makino, "Hierarchical clustering applied to overcomplete BSS for convolutive mixtures," ISCA Tutorial and Research Workshop on Statistical and Perceptual Audio Processing (SAPA 2004), Oct. 2004. (Paper: PDF)
H. Sawada, S. Winter, R. Mukai, S. Araki, S. Makino, "Estimating the Number of Sources for Frequency-Domain Blind Source Separation," Proc. ICA 2004 (LNCS 3195, © Springer), pp. 610-617, Sep. 2004.
S. C. Douglas, H. Sawada, S. Makino, "On Coefficient Delay in Natural Gradient Blind Deconvolution and Source Separation Algorithms," Proc. ICA 2004 (LNCS 3195, © Springer), pp. 634-642, Sep. 2004.
S. Winter, H. Sawada, S. Araki, S. Makino, "Overcomplete BSS for convolutive mixtures based on hierarchical clustering," Proc. ICA 2004 (LNCS 3195, © Springer), pp. 652-660, Sep. 2004.
H. Sawada, R. Mukai, S. Araki, S. Makino, "Convolutive Blind Source Separation for more than Two Sources in the Frequency Domain," IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2004), vol. III, pp. 885-888, May. 2004.
S. C. Douglas, H. Sawada, S. Makino, "Natural Gradient Multichannel Blind Deconvolution and Source Separation using Causal FIR Filters," IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2004), vol. V, pp. 477-480, May. 2004.
S. C. Douglas, H. Sawada, S. Makino, "A Causal Frequency-Domain Implementation of a Natural Gradient Multichannel Blind Deconvolution and Source Separation Algorithm," International Congress on Acoustics, p. I-85, Apr. 2004.
H. Sawada, R. Mukai, S. Araki, S. Makino, "Solving the Permutation and the Circularity Problem of Frequency-Domain Blind Source Separation," International Congress on Acoustics, pp. I-89, Apr. 2004. (Paper: PDF)
S. C. Douglas, H. Sawada, S. Makino, "Natural Gradient Multichannel Blind Deconvolution and Speech Separation Using Causal FIR Filters," Asilomar Conference on Signals, Systems, and Computers, MP2-3, Nov. 2003.
S. Winter, H. Sawada, S. Makino, "Geometrical Understanding of the PCA Subspace Method for Overdetermined Blind Source Separation," International Workshop on Acoustic Echo and Noise Control (IWAENC2003), pp. 231-234, Sep. 2003. (Paper: PDF)
H. Sawada, R. Mukai, S. de la Kethulle, S. Araki, S. Makino, "Spectral Smoothing for Frequency-Domain Blind Source Separation," International Workshop on Acoustic Echo and Noise Control (IWAENC2003), pp. 311-314, Sep. 2003. (Paper: PDF)
H. Sawada, R. Mukai, S. Makino, "Direction of Arrival Estimation for Multiple Source Signals using Independent Component Analysis," Seventh International Symposium on Signal Processing and its Applications (ISSPA 2003), vol. 2, pp. 411-414, July 2003. (Paper: PDF)
H. Sawada, R. Mukai, S. Araki, S. Makino, "A Robust Approach to the Permutation Problem of Frequency-Domain Blind Source Separation," IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2003), vol. V, pp. 381-384, Apr. 2003.
S. Winter, H. Sawada, S. Makino, "Geometrical understanding of the PCA subspace method for overdetermined blind source separation," IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP2003), vol. II, pp. 769-772, Apr. 2003.
H. Sawada, R. Mukai, S. Araki, S. Makino, "A Robust and Precise Method for Solving the Permutation Problem of Frequency-Domain Blind Source Separation," 4th International Symposium on Independent Component Analysis and Blind Signal Separation (ICA2003), pp. 505-510, Apr. 2003. (Paper: PDF)
S. Winter, H. Sawada, S. Makino, "Geometrical interpretation of the PCA subspace method for overdetermined blind source separation," 4th International Symposium on Independent Component Analysis and Blind Signal Separation (ICA2003), pp. 775-780, Apr. 2003.
H. Sawada, S. Araki, R. Mukai, S. Makino, "Blind Source Separation with Different Sensor Spacing and Filter Length for Each Frequency Range," IEEE International Workshop on Neural Networks for Signal Processing (NNSP2002), pp. 465-474, Sep. 2002.
H. Sawada, R. Mukai, S. Araki, S. Makino, "Polar Coordinate based Nonlinear Function for Frequency Domain Blind Source Separation," IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP2002), vol. I, pp. 1001-1004, May 2002.
H. Sawada, R. Mukai, S. Araki and S. Makino, "A Polar-Coordinate based Activation Function for Frequency Domain Blind Source Separation," 3rd International Conference on Independent Component Analysis and Blind Signal Separation (ICA2001), pp. 663-668, Dec. 2001. (Paper: PDF)
H. Sawada, S. Yamashita and A. Nagoya, "SPFD: A Method to Express Functional Flexibility," 10th International Workshop on Post-Binary ULSI Systems, May 2001.
K. Aoyama, H. Sawada, A. Nagoya and K. Nakajima "A Threshold Logic-based Reconfigurable Element with a Novel Programming Technology," International Workshop on Field Programmable Logic and Applications (FPL 2000), August 2000.
S. Yamashita, H. Sawada and A. Nagoya, "A Layout Driven Logic Decomposition Model," International Workshop on Logic Synthesis (IWLS 2000), May 2000.
H. Sawada, S. Yamashita and A. Nagoya, "A Boolean Division Algorithm based on Implicit Cube Set Representations," Workshop on Synthesis and System Integration of Mixed Technologies (SASIMI 2000), pp. 279-283, April 2000.
S. Yamashita, H. Sawada and A. Nagoya, "An Efficient Framework of Using Various Decomposition Methods to Synthesize LUT Networks and Its Evaluation," Asia and South Pacific Design Automation Conference (ASP-DAC 2000), pp. 253-258, January 2000.
H. Sawada, S. Yamashita and A. Nagoya, "An Efficient Method for Generating Kernels on Implicit Cube Set Representations," International Workshop on Logic Synthesis (IWLS '99), pp. 260-263, June 1999. (Paper: PDF)
S. Yamashita, H. Sawada and A. Nagoya, "An Integrated Approach for Synthesizing LUT Networks," Proc. of the 9th Great Lakes Symposium on VLSI (GLS-VLSI '99), pp. 136-139, Feb. 1999.
H. Sawada, S. Yamashita and A. Nagoya, "Efficient Methods for a Simple Disjoint Decomposition and Non-Disjoint Bi-Decomposition," 7th International Workshop on Post-Binary ULSI Systems, pp. 34-37, May 1998. (Handout: PDF)
H. Sawada, S. Yamashita and A. Nagoya, "Restructuring Logic Representations with Easily Detectable Simple Disjunctive Decompositions," Proc. Design, Automation and Test in Europe Conf. (DATE '98), pp. 755-759, Feb. 1998. (Paper: PDF)
S. Yamashita, H. Sawada and A. Nagoya, "New Methods to Find Optimal Non-Disjoint Bi-Decompositions," Proc. of Asia and South Pacific Design Automation Conference 1998 (ASP-DAC '98), pp. 59-68, Feb. 1998.
T. Suyama, M. Yokoo, and H. Sawada, "Solving Satisfiability Problems Using Logic Synthesis and Reconfigurable Hardware," Proc. of the 31st Annual Hawaii International Conference on System Sciences (HICSS-31), Vol. VII, pp. 179-186, Jan. 1998.
H. Sawada, S. Yamashita and A. Nagoya, "Restricted Simple Disjunctive Decompositions Based on Grouping Symmetric Variables," Proc. the Seventh Great Lakes Symposium on VLSI (GLS-VLSI '97), pp. 39-44, Mar. 1997.
S. Yamashita, H. Sawada and A. Nagoya, "A New Method to Express Functional Permissibilities for LUT based FPGAs and Its Applications," Proc. Int'l Conf. Computer-Aided Design (ICCAD '96), pp. 254-261, Nov. 1996.
T. Suyama, M. Yokoo, and H. Sawada, "Solving Satisfiability Problems on FPGAs," Proc. of the 6th International Workshop on Field Programmable Logic and Applications (FPL '96), pp. 136-145, Sep. 1996.
M. Yokoo, T. Suyama, H. Sawada, "Solving Satisfiability Problems using Field Programmable Gate Arrays: First Results," Second International Conference on Principles and Practice of Constraint Programming (CP-96), pp. 497-509, Aug. 1996.
T. Suyama, H. Sawada and A. Nagoya, "LUT-based FPGA Technology Mapping using Permissible Functions," Proc. of the 9th International Conference on VLSI Design (VLSI Design '96), pp. 215-218, Jan. 1996.
H. Sawada, T. Suyama and A. Nagoya, "Logic Synthesis for Look-Up Table based FPGAs using Functional Decomposition and Support Minimization," Proc. Int'l Conf. Computer-Aided Design (ICCAD '95), pp. 353-358, Nov. 1995.
H. Sawada, T. Suyama and A. Nagoya, "Logic Synthesis Method for Look-Up Table Architectures using Functional Decomposition and Support Minimization," Proc. SASIMI, pp. 161-168, Aug. 1995.
N. Ishiura, H. Sawada and S. Yajima, "Minimization of Binary Decision Diagrams based on Exchanges of Variables," Proc. Int'l Conf. Computer-Aided Design (ICCAD '91), pp. 472-475, Nov. 1991.

Theses

"Computational Power of Binary Decision Diagrams," Master Thesis, Department of Information Science, Faculty of Engineering, Kyoto University, Feb. 1993.

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