Hiroshi HASEGAWA


Fast Optical Circuit Switch for Intra-Datacenter Networking
Koh UEDA Yojiro MORI Hiroshi HASEGAWA Hiroyuki MATSUURA Kiyo ISHII Haruhiko KUWATSUKA Shu NAMIKI Toshio WATANABE Ken-ichi SATO 
Publication:   
Publication Date: 2017/10/01
Vol. E100-B  No. 10  pp. 1740-1746
Type of Manuscript:  INVITED PAPER (Joint Special Section on Opto-electronics and Communications for Future Optical Network)
Category: 
Keyword: 
switchingcircuitarray waveguide devices
 Summary | Full Text:PDF(2.3MB)

Dynamic Path Provisioning and Disruption-Free Reoptimization Algorithms for Bandwidth on-Demand Services Considering Fairness
Masahiro NAKAGAWA Hiroshi HASEGAWA Ken-ichi SATO 
Publication:   
Publication Date: 2017/04/01
Vol. E100-B  No. 4  pp. 536-547
Type of Manuscript:  PAPER
Category: Network
Keyword: 
dynamic network controlfairness between pathshitless reroutingmake before break routing
 Summary | Full Text:PDF(2.5MB)

Survivable Grouped Routing Optical Networks with Dedicated Path Protection
Hiroshi HASEGAWA Yojiro MORI Ken-ichi SATO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2016/07/01
Vol. E99-B  No. 7  pp. 1435-1444
Type of Manuscript:  PAPER
Category: Network
Keyword: 
grouped routing optical networkscoarse granular routingresiliencydedicated path protectionimpairment-aware
 Summary | Full Text:PDF(1.6MB)

Differential Reliability Path Accommodation Design and Reconfiguration in Virtualized Multi-Layer Transport Network
Akihiro KADOHATA Takafumi TANAKA Atsushi WATANABE Akira HIRANO Hiroshi HASEGAWA Ken-ichi SATO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2015/11/01
Vol. E98-B  No. 11  pp. 2151-2159
Type of Manuscript:  Special Section PAPER (Special Section on Network Systems for Virtualized Environment)
Category: 
Keyword: 
multi-layer transport networknetwork virtualizationrobustness and reconfiguration
 Summary | Full Text:PDF(2.8MB)

Pre-Adjustment Rerouting for Wavelength Defragmentation in Optical Transparent WDM Networks
Akihiro KADOHATA Atsushi WATANABE Akira HIRANO Hiroshi HASEGAWA Ken-ichi SATO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2015/10/01
Vol. E98-B  No. 10  pp. 2014-2021
Type of Manuscript:  PAPER
Category: Fiber-Optic Transmission for Communications
Keyword: 
optical transparent wdm networksreconfigurationdefragmentation
 Summary | Full Text:PDF(1.7MB)

Efficient Shared Protection Network Design Algorithm that Iterates Path Relocation with New Resource Utilization Metrics
Masakazu SATO Hiroshi HASEGAWA Ken-ichi SATO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2013/04/01
Vol. E96-B  No. 4  pp. 956-966
Type of Manuscript:  PAPER
Category: Fiber-Optic Transmission for Communications
Keyword: 
optical path networkrouting and wavelength assignmentshared protectioniterative re-optimization
 Summary | Full Text:PDF(3.8MB)

Impact of Elastic Optical Paths That Adopt Distance Adaptive Modulation to Create Efficient Networks
Tatsumi TAKAGI Hiroshi HASEGAWA Ken-ichi SATO Yoshiaki SONE Akira HIRANO Masahiko JINNO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/12/01
Vol. E95-B  No. 12  pp. 3793-3801
Type of Manuscript:  PAPER
Category: Fiber-Optic Transmission for Communications
Keyword: 
elastic optical path networkdistance adaptive modulationrouting and spectrum assignmentnetwork design
 Summary | Full Text:PDF(2.1MB)

Router Power Reduction through Dynamic Performance Control Based on Traffic Predictions
Hiroyuki ITO Hiroshi HASEGAWA Ken-ichi SATO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/10/01
Vol. E95-B  No. 10  pp. 3130-3138
Type of Manuscript:  PAPER
Category: Energy in Electronics Communications
Keyword: 
routerperformance controlenergy efficiency
 Summary | Full Text:PDF(1.7MB)

Optical Fast Circuit Switching Networks Employing Dynamic Waveband Tunnel
Takahiro OGAWA Hiroshi HASEGAWA Ken-ichi SATO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/10/01
Vol. E95-B  No. 10  pp. 3139-3148
Type of Manuscript:  PAPER
Category: Fiber-Optic Transmission for Communications
Keyword: 
hierarchical optical path networkoptical circuit switchingrouting and wavelength assignmentwavebanddynamic control
 Summary | Full Text:PDF(3.5MB)

Effects of Optical Layer Protection Granularity in Survivable Hierarchical Optical Path Network
Yoshiyuki YAMADA Hiroshi HASEGAWA Ken-ichi SATO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/09/01
Vol. E95-B  No. 9  pp. 2959-2963
Type of Manuscript:  LETTER
Category: Network
Keyword: 
hierarchical optical path networkwavebandsurvivabilityprotection
 Summary | Full Text:PDF(663.1KB)

Optical Node Architectures That Utilize Dedicated Add/Drop Switches to Realize Colorless, Directionless and Contentionless Capability
Yoshiyuki YAMADA Hiroshi HASEGAWA Ken-ichi SATO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/04/01
Vol. E95-B  No. 4  pp. 1307-1316
Type of Manuscript:  PAPER
Category: Fiber-Optic Transmission for Communications
Keyword: 
optical cross-connectcolorless/directionless/contentionlesswavebandmulti-layer optical paths
 Summary | Full Text:PDF(1.4MB)

Virtual Fiber Networking and Impact of Optical Path Grooming on Creating Efficient Layer One Services
Fumisato NARUSE Yoshiyuki YAMADA Hiroshi HASEGAWA Ken-ichi SATO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/03/01
Vol. E95-B  No. 3  pp. 723-729
Type of Manuscript:  Special Section PAPER (Special Section on New/Next Generation Photonic Networking and Future Networks)
Category: 
Keyword: 
wavebandoptical path groomingvirtual fiber networkingvirtual private networklayer one service
 Summary | Full Text:PDF(1.1MB)

Compact Matrix-Switch-Based Hierarchical Optical Path Cross-Connect with Colorless Waveband Add/Drop Ratio Restriction
Ryosuke HIRAKO Kiyo ISHII Hiroshi HASEGAWA Ken-ichi SATO Osamu MORIWAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2011/04/01
Vol. E94-B  No. 4  pp. 918-927
Type of Manuscript:  Special Section PAPER (Special Section on Photonic Network Technologies in Terabit Network Era)
Category: 
Keyword: 
hierarchical optical cross-connectwavebandadd/drop ratioMUX/DMUXAWG
 Summary | Full Text:PDF(3.2MB)

Optical Cross-Connect Switch Architectures for Hierarchical Optical Path Networks
Shoji KAKEHASHI Hiroshi HASEGAWA Ken-ichi SATO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/10/01
Vol. E91-B  No. 10  pp. 3174-3184
Type of Manuscript:  PAPER
Category: Switching for Communications
Keyword: 
wavebandwaveband cross-connectoptical cross-connect
 Summary | Full Text:PDF(1.6MB)

An Edge-Preserving Super-Precision for Simultaneous Enhancement of Spacial and Grayscale Resolutions
Hiroshi HASEGAWA Toshinori OHTSUKA Isao YAMADA Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/02/01
Vol. E91-A  No. 2  pp. 673-681
Type of Manuscript:  PAPER
Category: Image
Keyword: 
super-resolutionHuber functiontotal variationset-theoretic approachouter approximationhybrid steepest descent method
 Summary | Full Text:PDF(2MB)

Formulation of Waveguide Connection for Waveband MUX/DEMUX Using Concatenated Arrayed-Waveguide Gratings
Shoji KAKEHASHI Hiroshi HASEGAWA Ken-ichi SATO Osamu MORIWAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/10/01
Vol. E90-B  No. 10  pp. 2950-2952
Type of Manuscript:  LETTER
Category: Fiber-Optic Transmission for Communications
Keyword: 
wavebandwaveband filterAWGMUX/DEMUX
 Summary | Full Text:PDF(677.1KB)

Prospects and Challenges of Multi-Layer Optical Networks
Ken-ichi SATO Hiroshi HASEGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/08/01
Vol. E90-B  No. 8  pp. 1890-1902
Type of Manuscript:  SURVEY PAPER
Category: Traffic Engineering and Multi-Layer Networking
Keyword: 
optical pathwavebandphotonic networkmulti-layer optical pathsoptical cross-connect
 Summary | Full Text:PDF(1.4MB)

An Iterative MPEG Super-Resolution with an Outer Approximation of Framewise Quantization Constraint
Hiroshi HASEGAWA Toshiyuki ONO Isao YAMADA Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/09/01
Vol. E88-A  No. 9  pp. 2427-2435
Type of Manuscript:  PAPER
Category: Image
Keyword: 
super-resolutionMPEG videoset-theoretic approachouter approximationadaptive projected subgradient method
 Summary | Full Text:PDF(885.3KB)

Evaluation of the Corresponding Degree between a Visual Image and Its Associated Sound under Dynamic Conditions on a Wide Screen
Hiroshi HASEGAWA Miyoshi AYAMA Shuichi MATSUMOTO Atsushi KOIKE Koichi TAKAGI Masao KASUGA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/06/01
Vol. E87-A  No. 6  pp. 1409-1416
Type of Manuscript:  Special Section PAPER (Special Section on Papers Selected from 2003 International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2003))
Category: 
Keyword: 
auditory-visual interactionventriloquist effectwide screenperipheral visual field
 Summary | Full Text:PDF(960.4KB)

Discrete Time-Frequency Projection Filtering Based on an Alias-Free Discrete Time-Frequency Analysis
Hiroshi HASEGAWA Isao YAMADA Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/06/01
Vol. E87-A  No. 6  pp. 1537-1545
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
time-frequency analysisCohen's classdiscrete time and frequencylinear time-varying filtering
 Summary | Full Text:PDF(671.8KB)

A Truncated Polynomial Interpolation and Its Application to Polynomially WLS Design of IIR Filters
Hiroshi HASEGAWA Masashi NAKAGAWA Isao YAMADA Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/07/01
Vol. E86-A  No. 7  pp. 1742-1748
Type of Manuscript:  PAPER
Category: Digital Signal Processing
Keyword: 
Walsh's theoremweighted least-squares approximationrational approximationdesign of IIR filters
 Summary | Full Text:PDF(426.4KB)

A Higher Order Generalization of an Alias-Free Discrete Time-Frequency Analysis
Hiroshi HASEGAWA Yasuhiro MIKI Isao YAMADA Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2002/08/01
Vol. E85-A  No. 8  pp. 1774-1780
Type of Manuscript:  Special Section PAPER (Special Section on Digital Signal Processing)
Category: Theory of Signals
Keyword: 
time-frequency analysishigher order moment spectradiscrete-time & frequencykernel designhybrid steepest descent method
 Summary | Full Text:PDF(476.1KB)

A Design of Near Perfect Reconstruction Linear-Phase QMF Banks Based on Hybrid Steepest Descent Method
Hiroshi HASEGAWA Isao YAMADA Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/08/25
Vol. E83-A  No. 8  pp. 1523-1530
Type of Manuscript:  Special Section PAPER (Special Section on Digital Signal Processing)
Category: Filter Banks
Keyword: 
two-channel linear phase FIR QMF banknear perfect reconstructionconvex projection techniquehybrid steepest descent methodmagnitude product space
 Summary | Full Text:PDF(716.7KB)

Simply Realization of Sound Localization Using HRTF Approximated by IIR Filter
Hiroshi HASEGAWA Masao KASUGA Shuichi MATSUMOTO Atsushi KOIKE 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2000/06/25
Vol. E83-A  No. 6  pp. 973-978
Type of Manuscript:  Special Section PAPER (Special Section of Papers Selected from 1999 International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC'99))
Category: 
Keyword: 
IIR filterHRTF (head-related transfer function)dummy-headsound localizationbinaural reproduction
 Summary | Full Text:PDF(763.7KB)

A 1.5 V, 8 mW, 8 b, 15 Msps BiCMOS A/D Converter
Michio YOTSUYANAGI Hiroshi HASEGAWA Masaharu SATO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/02/25
Vol. E82-A  No. 2  pp. 286-292
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics)
Category: 
Keyword: 
A/D convertercomparatorBiCMOSlow voltage
 Summary | Full Text:PDF(573.7KB)

A Note on Constrained Least Squares Design of M-D FIR Filter Based on Convex Projection Techniques
Isao YAMADA Hiroshi HASEGAWA Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/08/25
Vol. E81-A  No. 8  pp. 1586-1591
Type of Manuscript:  Special Section PAPER (Special Section on Digital Signal Processing)
Category: 
Keyword: 
multidimensional FIR filter constrained least squares designconvex projection Dykstra's algorithm
 Summary | Full Text:PDF(502.9KB)

Communication System for People with Physical Disability Using Voice Recognizer
Seigou YASUDA Akira OKAMOTO Hiroshi HASEGAWA Yoshito MEKADA Masao KASUGA Kazuo KAMATA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/06/25
Vol. E81-A  No. 6  pp. 1097-1104
Type of Manuscript:  Special Section PAPER (Special Section of Papers Selected from ITC-CSCC'97)
Category: Human Communications and Ergonomics
Keyword: 
disabled peoplemulti-modal interfacevoice recognitionelectronic mail
 Summary | Full Text:PDF(902.9KB)