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ORCIDTakafumi Hayashi
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2020 – today
- 2021
[j43]Anh-Tuan H. Bui
, Chuyen T. Nguyen, Takafumi Hayashi, Anh T. Pham:
Small-Cell Assisted Group Paging for Massive MTC in LTE Networks: Design and Analysis. IEEE Access 9: 40933-40949 (2021)- 2020
- [j42]Sho Kuroda, Shinya Matsufuji, Takahiro Matsumoto, Yuta Ida, Takafumi Hayashi:
Design of Compact Matched Filter Banks of Polyphase ZCZ Codes. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 103-A(9): 1103-1110 (2020)
2010 – 2019
- 2019
- [j41]Thanh V. Pham, Takafumi Hayashi, Anh T. Pham:
Artificial-Noise-Aided Precoding Design for Multi-User Visible Light Communication Channels. IEEE Access 7: 3767-3777 (2019) - 2018
- [j40]Takafumi Hayashi, Takao Maeda, Anh T. Pham, Shinya Matsufuji:
A Novel Class of Structured Zero-Correlation Zone Sequence Sets. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 101-A(12): 2171-2183 (2018) - [j39]Zhenni Li, Takafumi Hayashi, Shuxue Ding, Yujie Li:
Dictionary learning with the \({{\ell }_{1/2}}\) -regularizer and the coherence penalty and its convergence analysis. Int. J. Mach. Learn. Cybern. 9(8): 1351-1364 (2018) - [c34]Thanh V. Pham, Takafumi Hayashi, Anh T. Pham:
Artificial-Noise-Aided Precoding Design for Multi-User Visible Light Communication Channels. ICC Workshops 2018: 1-6 - [c33]Takafumi Hayashi, Yoshinobu Tanno, Anh T. Pham, Shinya Matsufuji, Kensaku Kawauchi, Takao Maeda:
A Novel Construction of Quadtree-structured Zero-correlation Zone Sequence Sets. ISITA 2018: 476-480 - [c32]Tomoki Murakami, Toshiro Nakahira, Hirantha Abeysekera, Koichi Ishihara, Takafumi Hayashi, Hiroyuki Nakamura:
WiSMA: strategy management architecture for wireless resource optimization. ISPACS 2018: 307-312 - 2017
- [j38]Zhenni Li, Shuxue Ding, Takafumi Hayashi, Yujie Li:
Incoherent dictionary learning with log-regularizer based on proximal operators. Digit. Signal Process. 63: 86-99 (2017) - [j37]Takafumi Hayashi, Yodai Watanabe, Toshiaki Miyazaki, Anh T. Pham, Takao Maeda, Shinya Matsufuji:
A Novel Class of Quadriphase Zero-Correlation Zone Sequence Sets. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 100-A(4): 953-960 (2017) - [j36]Takafumi Hayashi, Yodai Watanabe, Takao Maeda, Shinya Matsufuji:
A Novel Construction of Tree-Structured Zero-Correlation Zone Sequence Sets. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 100-A(10): 2187-2194 (2017) - [j35]Zhenni Li, Shuxue Ding, Takafumi Hayashi, Yujie Li:
Analysis dictionary learning using block coordinate descent framework with proximal operators. Neurocomputing 239: 165-180 (2017) - 2016
- [c31]Zhenni Li, Takafumi Hayashi, Shuxue Ding, Xiang Li:
An efficient algorithm for incoherent analysis dictionary learning based on proximal operator. SMC 2016: 3546-3549 - 2015
- [j34]Takafumi Hayashi, Yodai Watanabe, Anh T. Pham, Toshiaki Miyazaki, Shinya Matsufuji, Takao Maeda:
A Novel Class of Zero-Correlation Zone Sequence Set Having a Low Peak-Factor and a Flat Power Spectrum. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 98-A(12): 2429-2438 (2015) - [j33]Takao Maeda, Yodai Watanabe, Takafumi Hayashi:
Parameterization of High-Dimensional Perfect Sequences over a Composition Algebra over R. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 98-A(12): 2439-2445 (2015) - [c30]Toshiaki Miyazaki, Peng Li, Song Guo, Junji Kitamichi, Takafumi Hayashi, Tsuneo Tsukahara:
On-demand Customizable Wireless Sensor Network. ANT/SEIT 2015: 302-309 - [c29]Keisuke Tamoi, Takafumi Hayashi, Yodai Watanabe:
Security analysis of audio secret sharing scheme encrypting audio secrets. iCAST 2015: 130-134 - [c28]Thanh V. Pham, Hoa Le Minh, Zabih Ghassemlooy, Takafumi Hayashi, Anh T. Pham:
Sum-rate maximization of multi-user MIMO visible light communications. ICC Workshops 2015: 1344-1349 - [c27]Zhenni Li, Shuxue Ding, Takafumi Hayashi, Wuhui Chen, Yujie Li:
An efficient algorithm for dictionary learning with a mixed-norm regularizer for sparsity based on proximal operator. ICSPCS 2015: 1-5 - [c26]Meng-Chun Wu, Takafumi Hayashi:
An optimal partial transmit sequence combination method for peak-to-average power ratio reduction in SC-FDMA system. IWSDA 2015: 1-4 - [c25]Shinya Matsufuji, Takafumi Hayashi, Sho Kuroda, Yuta Ida, Takahiro Matsumoto:
On bent ZCZ codes. IWSDA 2015: 196-199 - [c24]Takafumi Hayashi, Yodai Watanabe, Anh T. Pham, Toshiaki Miyazaki, Shinya Matsufuji, Takao Maeda:
A novel class of QPSK zero-correlation zone sequence sets. IWSDA 2015: 205-208 - 2014
- [j32]Takafumi Hayashi, Takao Maeda, Shigeru Kanemoto, Shinya Matsufuji:
Low-Peak-Factor Pseudo-White-Noise Sequence Set with Optimal Zero-Correlation Zone. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 97-A(12): 2343-2351 (2014) - [c23]Toshiaki Miyazaki, Shoichi Yamaguchi, Koji Kobayashi, Junji Kitamichi, Song Guo, Tsuneo Tsukahara, Takafumi Hayashi:
A software defined wireless sensor network. ICNC 2014: 847-852 - [c22]Toshiaki Miyazaki, Hiroki Iwata, Koji Kobayashi, Shoichi Yamaguchi, Deze Zeng, Song Guo, Junji Kitamichi, Takafumi Hayashi, Tsuneo Tsukahara:
DASN: demand-addressable sensor network for active information acquisition. ICUIMC 2014: 1:1-1:7 - [c21]Joseph C. Tsai, Neil Y. Yen, Takafumi Hayashi:
Social network based smart grids analysis. ISIC 2014: 20-25 - [c20]Takafumi Hayashi, Yodai Watanabe, Takao Maeda:
A novel class of binary zero-correlation zone sequence sets by using a cyclic difference set. ISITA 2014: 650-654 - [c19]Takafumi Hayashi, Yodai Watanabe, Shinya Matsufuji, Takao Maeda:
A novel zero-correlation zone sequence set having a low-peak factor and a flat power spectrum. ISITA 2014: 655-659 - [c18]Takao Maeda, Takafumi Hayashi:
Parameterization of high-dimensional perfect sequences over a composition algebra over ℝ. ISITA 2014: 669-673 - 2013
- [j31]Takao Maeda, Takafumi Hayashi:
Fourier Analysis of Sequences over a Composition Algebra of the Real Number Field. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 96-A(12): 2452-2456 (2013) - [c17]Takafumi Hayashi, Hideyuki Fukuhara, Yasuhiro Abe, Masayuki Hisada, Jiro Yamazaki, Hajime Tokura, Toshiaki Miyazaki, Jiro Iwase:
A novel network-centric infrastructure for social networking services using a messaging network. APNOMS 2013: 1-3 - [c16]Shoichi Yamaguchi, Toshiaki Miyazaki, Junji Kitamichi, Song Guo, Tsuneo Tsukahara, Takafumi Hayashi:
Programmable wireless sensor node featuring low-power FPGA and microcontroller. iCAST/UMEDIA 2013: 596-601 - [c15]Takafumi Hayashi, Takao Maeda, Shigeru Kanemoto, Shinya Matsufuji:
Low-peak factor optimal zero-correlation zone sequence set and its applications. IWSDA 2013: 72-75 - [c14]Deze Zeng, Toshiaki Miyazaki, Song Guo, Tsuneo Tsukahara, Junji Kitamichi, Takafumi Hayashi:
Evolution of Software-Defined Sensor Networks. MSN 2013: 410-413 - 2012
- [j30]Takafumi Hayashi, Takao Maeda, Shinya Matsufuji:
A Generalized Construction Scheme of a Zero-Correlation Zone Sequence Set with a Wide Inter-Subset Zero-Correlation Zone. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 95-A(11): 1931-1936 (2012) - [j29]Takao Maeda, Takafumi Hayashi:
Parameterization of Perfect Sequences over a Composition Algebra. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 95-A(12): 2139-2147 (2012) - [c13]Takafumi Hayashi, Atsushi Kara, Toshiaki Miyazaki, Jiro Iwase, Hideyuki Fukuhara, Tetsu Saburi, Masayuki Hisada:
Coping with the Complexity of SOA Systems with Message Forensics. AINA Workshops 2012: 732-737 - [c12]Takao Maeda, Takafumi Hayashi:
Fourier analysis of sequences over a composition algebra of the real number field. ISITA 2012: 625-628 - 2011
- [j28]Takao Maeda, Takafumi Hayashi:
Parameterization of Perfect Sequences of Real Numbers. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 94-A(6): 1401-1407 (2011) - [j27]Takafumi Hayashi, Takao Maeda, Satoshi Okawa:
A Generalized Construction of Zero-Correlation Zone Sequence Set with Sequence Subsets. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 94-A(7): 1597-1602 (2011) - [j26]Takao Maeda, Takafumi Hayashi:
Parameterization of Perfect Arrays of Real Numbers. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 94-A(11): 2178-2187 (2011) - [j25]Takafumi Hayashi, Takao Maeda, Shinya Matsufuji, Satoshi Okawa:
A Ternary Zero-Correlation Zone Sequence Set Having Wide Inter-Subset Zero-Correlation Zone. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 94-A(11): 2230-2235 (2011) - [c11]Takao Maeda, Shigeru Kanemoto, Takafumi Hayashi:
Pulse compression for radar using zero-correlation zone sequence sets. IGARSS 2011: 3440-3443 - [c10]Takafumi Hayashi, Takao Maeda, Shigeru Kanemoto, Shinya Matsufuji:
A novel construction of zero-correlation zone sequence set with wide inter-subset zero-correlation zone. IWSDA 2011: 25-28 - 2010
- [j24]Shinya Matsufuji, Takahiro Matsumoto, Tomohiro Hayashida, Takafumi Hayashi, Noriyoshi Kuroyanagi, Pingzhi Fan:
On a ZCZ Code Including a Sequence Used for a Synchronization Symbol. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 93-A(11): 2286-2290 (2010) - [j23]Takafumi Hayashi, Shinya Matsufuji:
A Generalized Construction of Optimal Zero-Correlation Zone Sequence Set from a Perfect Sequence Pair. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 93-A(11): 2337-2344 (2010) - [c9]Raymond Wu, Masayuki Hisada, Atsushi Kara, Takafumi Hayashi:
Event Capture Approaches for Vulnerability Detection. Security and Management 2010: 330-335 - [c8]Raymond Wu, Masayuki Hisada, Atsushi Kara, Takafumi Hayashi:
Metadata Driven Approaches for Web Security of New age Computing. International Conference on Internet Computing 2010: 53-58 - [c7]Junya Terazono, Hideyuki Fukuhara, Isamu Koseda, Ryutaroh Fujita, Toshiaki Miyazaki, Senro Saito, Takafumi Hayashi:
Service oriented architecture realized by a messaging network. NOMS 2010: 934-937
2000 – 2009
- 2009
- [j22]Takafumi Hayashi:
A Class of Zero-Correlation Zone Sequence Set Using a Perfect Sequence. IEEE Signal Process. Lett. 16(4): 331-334 (2009) - 2008
- [j21]Takafumi Hayashi:
A Novel Class of Zero-Correlation Zone Sequence Sets Constructed from a Perfect Sequence. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 91-A(4): 1233-1237 (2008) - [j20]Takafumi Hayashi:
Zero-Correlation Zone Sequence Set Constructed from a Perfect Sequence and a Complementary Sequence Pair. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 91-A(7): 1676-1681 (2008) - 2007
- [j19]Takafumi Hayashi:
Zero-Correlation Zone Sequence Set Constructed from a Perfect Sequence. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 90-A(5): 1107-1111 (2007) - [j18]Takafumi Hayashi:
Zero-Correlation Zone Sequence Set Construction Using an Even-Perfect Sequence and an Odd-Perfect Sequence. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 90-A(9): 1871-1875 (2007) - [j17]Takafumi Hayashi:
An Integrated Sequence Construction of Binary Zero-Correlation Zone Sequences. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 90-A(10): 2329-2335 (2007) - [c6]Takafumi Hayashi:
Optimal Zero-Correlation Zone Sequence Set Constructed from a Perfect Sequence. CIT 2007: 475-479 - [c5]Naoto Harada, Takafumi Hayashi, Naru Hirata, Hirohide Demura, Noriaki Asada:
Recognition Algorithm for Topographic Features. CIT 2007: 685-689 - [c4]Takafumi Hayashi, Hideyuki Fukuhara, Ryutaroh Fujita, Toshiaki Miyazaki, Senro Saito:
A Messaging Network to Realize an SOA-Based System. CIT 2007: 1083-1088 - 2006
- [j16]Takafumi Hayashi:
A Class of Two-Dimensional Signal Having a Flat Power Spectrum and a Low Peak Factor. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 89-A(2): 494-502 (2006) - [j15]Takafumi Hayashi:
Binary Zero-Correlation Zone Sequence Set Constructed from an M-Sequence. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 89-A(2): 633-638 (2006) - [j14]Takafumi Hayashi:
Ternary Sequence Set Having Periodic and Aperiodic Zero-Correlation Zone. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 89-A(6): 1825-1831 (2006) - [j13]Takafumi Hayashi, Shinya Matsufuji:
On Optimal Construction of Two Classes of ZCZ Codes. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 89-A(9): 2345-2350 (2006) - [j12]Takafumi Hayashi:
Binary Zero-Correlation Zone Sequence Set Construction Using a Cyclic Hadamard Sequence. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 89-A(10): 2649-2655 (2006) - 2005
- [j11]Takafumi Hayashi, Takao Maeda, Satoshi Okawa:
Upper Bounds of the Correlation Functions of a Class of Binary Zero-Correlation-Zone Sequences. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 88-A(3): 791-794 (2005) - [j10]Takafumi Hayashi:
Binary Zero-Correlation Zone Sequence Set Construction Using a Primitive Linear Recursion. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 88-A(7): 2034-2038 (2005) - 2004
- [j9]Takafumi Hayashi:
A Generalization of Binary Zero-Correlation Zone Sequence Sets Constructed from Hadamard Matrices. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 87-A(1): 286-291 (2004) - [j8]Takafumi Hayashi, S. Okawa:
Low-peak pseudo-white-noise arrays. IEEE Signal Process. Lett. 11(2): 224-227 (2004) - [j7]Takafumi Hayashi, S. Okawa:
Binary array set having a cross-shaped zero-correlation zone. IEEE Signal Process. Lett. 11(4): 423-426 (2004) - [j6]Takafumi Hayashi:
Synthesis of two-dimensional pseudo white-noise signal with low peak factor. IEEE Signal Process. Lett. 11(10): 813-816 (2004) - 2003
- [j5]Takafumi Hayashi:
A Class of Ternary Sequence Sets with a Zero-Correlation Zone for Periodic, Aperiodic, and Odd Correlation Functions. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 86-A(7): 1850-1857 (2003) - [j4]Takafumi Hayashi:
Ternary Array Set Having a Zero-Correlation Zone. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 86-A(8): 2163-2167 (2003) - [c3]Takafumi Hayashi:
Limits of the Correlation Function of a Class of Binary Zero-correlation-zone Sequences. SIP 2003: 396-399 - 2002
- [j3]Takafumi Hayashi:
Binary Sequences with Orthogonal Subsequences and a Zero-Correlation Zone: Pair-Preserving Shuffled Sequences. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 85-A(6): 1420-1425 (2002) - [j2]Takafumi Hayashi, Hiroki Mori, Motoyuki Suzuki, Shozo Makino, Hirotomo Aso:
Speech Recognition Using Acoustic Similarity-Based Primitives. Syst. Comput. Jpn. 33(1): 8-17 (2002) - [j1]Takafumi Hayashi:
A class of two-dimensional binary sequences with zero-correlation zone. IEEE Signal Process. Lett. 9(7): 217-221 (2002)
1990 – 1999
- 1999
- [c2]Motoyuki Suzuki, Takafumi Hayashi, Hiroki Mori, Shozo Makino, Hirotomo Aso:
An Automatic Acquisition of Acoustical Units for Speech Recognition Based on Hidden Markov Network. Discovery Science 1999: 357-358 - 1995
- [c1]Tosiyasu L. Kunii, Gleb V. Nosovskij, Takafumi Hayashi:
A diffusion model for computer animation of diffuse ink painting. CA 1995: 98-102
Coauthor Index
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