Kiyomichi ARAKI


Optimal Design Method of MIMO Antenna Directivities and Corresponding Current Distributions by Using Spherical Mode Expansion
Maki ARAI Masashi IWABUCHI Kei SAKAGUCHI Kiyomichi ARAKI 
Publication:   
Publication Date: 2017/10/01
Vol. E100-B  No. 10  pp. 1891-1903
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
MIMOantenna directivityantenna structurecurrent distributionspherical mode expansioncapacity maximization
 Summary | Full Text:PDF(2.3MB)

Practical Implementation of Spectrum Sensing and Signal Detection for Satellite Broadcasting Systems
Hiroyuki KAMATA Gia Khanh TRAN Kei SAKAGUCHI Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2016/08/01
Vol. E99-B  No. 8  pp. 1894-1901
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
signal detectionsatellite broadcastDVB-SDVB-S2cognitive radio
 Summary | Full Text:PDF(1.5MB)

Study on RCS Reduction of Patch Array Using Switchable Absorption/Transmission Surface
Shinya KITAGAWA Ryosuke SUGA Osamu HASHIMOTO Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2016/07/01
Vol. E99-C  No. 7  pp. 805-808
Type of Manuscript:  BRIEF PAPER
Category: 
Keyword: 
RCSradar absorbertransmission surfaceradome
 Summary | Full Text:PDF(639.1KB)

Diamond Cellular Network —Optimal Combination of Small Power Basestations and CoMP Cellular Networks —
Hidekazu SHIMODAIRA Gia Khanh TRAN Kei SAKAGUCHI Kiyomichi ARAKI Shinobu NANBA Satoshi KONISHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2016/04/01
Vol. E99-B  No. 4  pp. 917-927
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
coordinated multi-point transmissionsmall power base stationdiamond cellular networkoptimal resource allocation
 Summary | Full Text:PDF(3MB)

Experimental Study on Battery-Less Sensor Network Activated by Multi-Point Wireless Energy Transmission
Daiki MAEHARA Gia Khanh TRAN Kei SAKAGUCHI Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2016/04/01
Vol. E99-B  No. 4  pp. 905-916
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
wireless sensor networksmulti-point wireless energy transmissioncarrier shift diversityindoor environmentbattery-less sensorprototype hardwareexperimental validation
 Summary | Full Text:PDF(3MB)

Robust and Low Complexity Bandwidth and Carrier Frequency Estimation for Cognitive Radio
Hiroyuki KAMATA Gia Khanh TRAN Kei SAKAGUCHI Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2016/02/01
Vol. E99-B  No. 2  pp. 499-506
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
signal detectioncoarse bandwidth estimationcoarse carrier frequency estimationspectrum sensingcognitivecyclostationarity
 Summary | Full Text:PDF(1.7MB)

Dual-Polarization RCS Reduction of X-Band Antenna Using Switchable Reflector
Shinya KITAGAWA Ryosuke SUGA Kiyomichi ARAKI Osamu HASHIMOTO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2015/07/01
Vol. E98-C  No. 7  pp. 701-708
Type of Manuscript:  Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technology)
Category: Microwaves, Millimeter-Waves
Keyword: 
radar cross sectionradar absorberantennareflectorpolarization
 Summary | Full Text:PDF(1.3MB)

Concurrent Multi-Band Mixer with Independent and Linear Gain Control
Takana KAHO Yo YAMAGUCHI Hiroyuki SHIBA Tadao NAKAGAWA Kazuhiro UEHARA Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2015/07/01
Vol. E98-C  No. 7  pp. 659-668
Type of Manuscript:  Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technology)
Category: Active Circuits/Devices/Monolithic Microwave Integrated Circuits
Keyword: 
concurrent multi-band mixerdual-bandtriple-bandSiGe BiCMOSflexible wireless system
 Summary | Full Text:PDF(1.6MB)

Experimental Validation of Digital Pre-distortion Technique for Dual-band Dual-signal Amplification by Single Feedback Architecture Employing Dual-band Mixer
Ikuma ANDO Gia Khanh TRAN Kiyomichi ARAKI Takayuki YAMADA Takana KAHO Yo YAMAGUCHI Tadao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2015/03/01
Vol. E98-C  No. 3  pp. 242-251
Type of Manuscript:  PAPER
Category: Electromagnetic Theory
Keyword: 
User Centric Wireless Networknonlinear power amplifiersspectral regrowthdigital predistortiondual-band mixer
 Summary | Full Text:PDF(2.4MB)

Large Scale Cooperation in Cellular Networks with Non-uniform User Distribution
Roya E. REZAGAH Gia Khanh TRAN Kei SAKAGUCHI Kiyomichi ARAKI Satoshi KONISHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/11/01
Vol. E97-B  No. 11  pp. 2512-2523
Type of Manuscript:  PAPER
Category: Terrestrial Wireless Communication/Broadcasting Technologies
Keyword: 
large scale CoMPnon-uniform user distributiondynamic cell structuringC-RANsystem rate maximization
 Summary | Full Text:PDF(1.9MB)

Complexity-Reduced Low Noise Matching Design of Receiver Front-end Amplifiers with Mutually Coupled 2×2 MIMO Antennas
Jaeho JEONG Gia Khanh TRAN Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/10/01
Vol. E97-C  No. 10  pp. 1005-1013
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-wave Technologies)
Category: 
Keyword: 
low noise matchingMIMOrealization circuitlossy conditionergodic capacity
 Summary | Full Text:PDF(1MB)

Experiments Validating the Effectiveness of Multi-Point Wireless Energy Transmission with Carrier Shift Diversity
Daiki MAEHARA Gia Khanh TRAN Kei SAKAGUCHI Kiyomichi ARAKI Minoru FURUKAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/09/01
Vol. E97-B  No. 9  pp. 1928-1937
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
wireless sensor networksmulti-point wireless energy transmissioncarrier shift diversityindoor environmentexperimental validation
 Summary | Full Text:PDF(3.2MB)

Nonlinear Modeling and Analysis on Concurrent Amplification of Dual-Band Gaussian Signals
Ikuma ANDO GiaKhanh TRAN Kiyomichi ARAKI Takayuki YAMADA Takana KAHO Yo YAMAGUCHI Kazuhiro UEHARA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2013/10/01
Vol. E96-C  No. 10  pp. 1254-1262
Type of Manuscript:  Special Section PAPER (Special Section on Emerging Technologies and Applications for Microwave and Millimeter-Wave Systems)
Category: 
Keyword: 
nonlinear power amplifierspectral regrowthACPREVMOFDMcomplex Gaussian distributionFlexible Wireless SystemVolterra series expansiongeneral Wiener model
 Summary | Full Text:PDF(1.7MB)

Simple Linearity Analysis of Passive Mixer Based on DC Characteristics of MOS FET
Yohei MORISHITA Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2013/10/01
Vol. E96-C  No. 10  pp. 1236-1244
Type of Manuscript:  Special Section PAPER (Special Section on Emerging Technologies and Applications for Microwave and Millimeter-Wave Systems)
Category: 
Keyword: 
frequency conversiongainlinearitymixersMOSFET circuitsswitching circuits
 Summary | Full Text:PDF(1.4MB) | (Errata[Uploaded on February 1,2014])

Optimization of Picocell Locations and Its Parameters in Heterogeneous Networks with Hotspots
Hidekazu SHIMODAIRA Gia Khanh TRAN Kei SAKAGUCHI Kiyomichi ARAKI Shoji KANEKO Noriaki MIYAZAKI Satoshi KONISHI Yoji KISHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2013/06/01
Vol. E96-B  No. 6  pp. 1338-1347
Type of Manuscript:  Special Section PAPER (Special Section on Heterogeneous Networks for Future Cellular Systems)
Category: 
Keyword: 
heterogeneous networkspicocellresource allocationcell associationpico BS locationoptimization problem
 Summary | Full Text:PDF(3MB)

An Efficient Relay Placement Method with Power Allocation for MIMO Two-Way Multi-Hop Networks
Gia Khanh TRAN Rindranirina RAMAMONJISON Kei SAKAGUCHI Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2013/05/01
Vol. E96-B  No. 5  pp. 1176-1186
Type of Manuscript:  PAPER
Category: Terrestrial Wireless Communication/Broadcasting Technologies
Keyword: 
multi-hoptwo-way relaynode placementpower allocationgeometric programmingconvex optimizationMIMOinterference cancellationSINR balancingQoS constrained optimization
 Summary | Full Text:PDF(2.1MB)

Distributed Power Control Network and Green Building Test-Bed for Demand Response in Smart Grid
Kei SAKAGUCHI Van Ky NGUYEN Yu TAO Gia Khanh TRAN Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/05/01
Vol. E96-A  No. 5  pp. 896-907
Type of Manuscript:  Special Section PAPER (Special Section on Networked Control Systems: Theories & Applications)
Category: 
Keyword: 
smart gridhierarchical power control networkdistributed control algorithmdemand responsecommunication latencyIEEE802.15.4g
 Summary | Full Text:PDF(4.7MB)

Performance Comparison between Open Loop and Closed Loop MIMO-OFDM Schemes Using Analytical Approach
Minjee KIM Gia Khanh TRAN Kei SAKAGUCHI Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/11/01
Vol. E95-B  No. 11  pp. 3498-3508
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
MIMO-OFDMCSIclosed loopopen loopSTBCInterleaverUE velocity
 Summary | Full Text:PDF(1.4MB)

Optimal Low Noise Single Front-End MIMO Receiver System with Parasitic Antenna Element
Jaeho JEONG Gia Khanh TRAN Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2012/10/01
Vol. E95-C  No. 10  pp. 1620-1626
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-Wave Technologies)
Category: 
Keyword: 
single front-endparasitic antenna elementlow noise receiverMIMO
 Summary | Full Text:PDF(1.1MB)

Design of a Direct Sampling Mixer with a Complex Coefficient Transfer Function
Yohei MORISHITA Noriaki SAITO Koji TAKINAMI Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2012/06/01
Vol. E95-C  No. 6  pp. 999-1007
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies)
Category: 
Keyword: 
attenuation poleCharge Domain Filter (CDF)complex filterDirect Sampling Mixer (DSM)discrete time systemsImage Rejection Mixer (IRM)IIR filtersreconfigurable architectures
 Summary | Full Text:PDF(1.3MB) | (Errata[Uploaded on February 1,2014])

Prototype Hardware for TDD Two-Way Multi-Hop Relay Network Using MIMO Network Coding
Keiichi MIZUTANI Takehiro MIYAMOTO Kei SAKAGUCHI Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/05/01
Vol. E95-B  No. 5  pp. 1738-1750
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
TDDMIMOtwo-way multi-hop relay networkMIMO network codingnetwork synchronizationprototype hardware950 MHz band
 Summary | Full Text:PDF(2.8MB)

Study on Resource Optimization for Heterogeneous Networks
Gia Khanh TRAN Shinichi TAJIMA Rindranirina RAMAMONJISON Kei SAKAGUCHI Kiyomichi ARAKI Shoji KANEKO Noriaki MIYAZAKI Satoshi KONISHI Yoji KISHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/04/01
Vol. E95-B  No. 4  pp. 1198-1207
Type of Manuscript:  Special Section PAPER (Special Section on Cognitive Radio and Heterogeneous Wireless Networks in Conjunction with Main Topics of CrownCom2011)
Category: 
Keyword: 
heterogeneous networkspectrum allocationpower allocationcell range expansionspectral efficiency
 Summary | Full Text:PDF(1.4MB)

Performance Analysis of MIMO Relay Network via Propagation Measurement in L-Shaped Corridor Environment
Namzilp LERTWIRAM Gia Khanh TRAN Keiichi MIZUTANI Kei SAKAGUCHI Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/04/01
Vol. E95-B  No. 4  pp. 1345-1356
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
MIMO relay networkpropagation measurementtwo-way relaycooperative relayrelay location
 Summary | Full Text:PDF(2.9MB)

Design of Predistorter with Efficient Updating Algorithm of Power Amplifier with Memory Effect
Yasuyuki OISHI Shigekazu KIMURA Eisuke FUKUDA Takeshi TAKANO Daisuke TAKAGO Yoshimasa DAIDO Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2012/03/01
Vol. E95-C  No. 3  pp. 382-394
Type of Manuscript:  PAPER
Category: Electronic Circuits
Keyword: 
power amplifierIMD measurementmemory effectbias impedancepredistorter
 Summary | Full Text:PDF(1.7MB)

Single Front-End MIMO Architecture with Parasitic Antenna Elements
Mitsuteru YOSHIDA Kei SAKAGUCHI Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/03/01
Vol. E95-B  No. 3  pp. 882-888
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
single front-end architectureparasitic antenna elementsMIMOequal gain combining
 Summary | Full Text:PDF(704.4KB)

Dynamic Fractional Base Station Cooperation Using Shared Distributed Remote Radio Units for Advanced Cellular Networks
Naoki KUSASHIMA Ian Dexter GARCIA Kei SAKAGUCHI Kiyomichi ARAKI Shoji KANEKO Yoji KISHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2011/12/01
Vol. E94-B  No. 12  pp. 3259-3271
Type of Manuscript:  Special Section PAPER (Special Section on Cooperative Communications for Cellular Networks)
Category: 
Keyword: 
cellular networkMIMO transmissionfractional base station cooperationadaptive clusteringcoordinated scheduling
 Summary | Full Text:PDF(1.8MB)

Simplified Block Diagonalization for Multiuser MIMO Systems with Gram-Schmidt Orthogonalization
Yuyuan CHANG Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/11/01
Vol. E94-A  No. 11  pp. 2263-2270
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: Communication Theory and Signals
Keyword: 
MIMOmultiuser MIMOblock diagonalizationsimplificationGram-Schmidt orthogonalizationdownlink
 Summary | Full Text:PDF(585.1KB)

Simplified Capacity-Based User Scheduling Algorithm for Multiuser MIMO Systems with Block Diagonalization
Yuyuan CHANG Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2011/10/01
Vol. E94-B  No. 10  pp. 2837-2846
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
MIMOmultiuser diversityblock diagonalizationuser scheduling algorithmsimplificationGram-schmidt orthogonalization
 Summary | Full Text:PDF(637.9KB)

Performance Analysis of a 10-Gb/s Millimeter-Wave Impulse Radio Transmitter
Yasuhiro NAKASHA Naoki HARA Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/10/01
Vol. E94-C  No. 10  pp. 1557-1564
Type of Manuscript:  Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technology)
Category: Active Devices and Circuits
Keyword: 
impulse radiomillimeter-wavepulse generatorband-pass filterjitterintersymbol interference
 Summary | Full Text:PDF(1.2MB)

A Low-Noise, High-Gain Quasi-Millimeter-Wave Receiver MMIC with a Very High Degree of Integration Using 3D-MMIC Technology
Takana KAHO Yo YAMAGUCHI Kazuhiro UEHARA Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/10/01
Vol. E94-C  No. 10  pp. 1548-1556
Type of Manuscript:  Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technology)
Category: Active Devices and Circuits
Keyword: 
receiverlow noise3D-MMICfixed wireless access (FWA) system
 Summary | Full Text:PDF(1.6MB)

Iterative Determination of Phase Reference in IMD Measurement to Characterize Nonlinear Behavior, and to Derive Inverse, for Power Amplifier with Memory Effect
Yasuyuki OISHI Shigekazu KIMURA Eisuke FUKUDA Takeshi TAKANO Yoshimasa DAIDO Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/10/01
Vol. E94-C  No. 10  pp. 1515-1523
Type of Manuscript:  Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technology)
Category: Active Devices and Circuits
Keyword: 
power amplifierIMD measurementmemory effectbias impedancepredistorter
 Summary | Full Text:PDF(1.5MB)

Detailed Analysis of Multilayer Broad-Side Coupler with a Symmetric Structure
Hiroshi OKAZAKI Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/08/01
Vol. E94-C  No. 8  pp. 1253-1261
Type of Manuscript:  PAPER
Category: Microwaves, Millimeter-Waves
Keyword: 
broad-side couplerscoupled transmission linesmultilayer MMICsymmetric structure
 Summary | Full Text:PDF(1.2MB)

The Gaussian MIMO Broadcast Channel under Receive Power Protection Constraints
Ian Dexter GARCIA Kei SAKAGUCHI Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/12/01
Vol. E93-B  No. 12  pp. 3448-3460
Type of Manuscript:  Special Section PAPER (Special Section on Wireless Distributed Networks)
Category: 
Keyword: 
MIMO systemsbroadcast channelscapacity regionprecodingLagrangian dualitydirty paper codingwireless distributed networkspectrum sharingcognitive radio
 Summary | Full Text:PDF(1.5MB)

Effect of Power Allocation Schemes on MIMO Two-Way Multi-Hop Network
Jonghyun LEE Gia Khanh TRAN Kei SAKAGUCHI Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/12/01
Vol. E93-B  No. 12  pp. 3362-3370
Type of Manuscript:  Special Section PAPER (Special Section on Wireless Distributed Networks)
Category: 
Keyword: 
MIMO two-way multi-hop networkpower allocationeigenvector based power allocation (EPA)optimal power allocation (OPA)distributed power allocation (DPA)
 Summary | Full Text:PDF(891.4KB)

Efficient Method to Measure IMD of Power Amplifier with Simplified Phase Determination Procedure to Clarify Memory Effect Origins
Takeshi TAKANO Yasuyuki OHISHI Shigekazu KIMURA Michiharu NAKAMURA Kazuo NAGATANI Eisuke FUKUDA Yoshimasa DAIDO Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/07/01
Vol. E93-C  No. 7  pp. 991-999
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-Wave Technologies)
Category: 
Keyword: 
power amplifierIMD measurementmemory effectbias impedanceeven order nonlinearity
 Summary | Full Text:PDF(2.2MB)

An Analysis of Multi-Layer Inductors for Miniaturizing of GaAs MMIC
Yo YAMAGUCHI Takana KAHO Motoharu SASAKI Kenjiro NISHIKAWA Tomohiro SEKI Tadao NAKAGAWA Kazuhiro UEHARA Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/07/01
Vol. E93-C  No. 7  pp. 1119-1125
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-Wave Technologies)
Category: 
Keyword: 
multi-layer inductorstacked inductorthree-dimensional MMICGaAs
 Summary | Full Text:PDF(3.2MB)

A Novel Predistorter Design for Nonlinear Power Amplifier with Memory Effects in OFDM Communication Systems Using Orthogonal Polynomials
Yitao ZHANG Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/07/01
Vol. E93-C  No. 7  pp. 983-990
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-Wave Technologies)
Category: 
Keyword: 
power amplifiernonlinear distortionsmemory effectspredistorterorthogonal polynomialscomplex Gaussian distributedorthogonal frequency division multiplexing (OFDM)
 Summary | Full Text:PDF(851KB)

Performance Analysis of MIMO Schemes in Residential Home Environment via Wideband MIMO Propagation Measurement
Gia Khanh TRAN Nguyen Dung DAO Kei SAKAGUCHI Kiyomichi ARAKI Hiroshi IWAI Tsutomu SAKATA Koichi OGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/04/01
Vol. E93-A  No. 4  pp. 814-829
Type of Manuscript:  PAPER
Category: Communication Theory and Signals
Keyword: 
MIMO-OFDMwideband MIMO channel measurementresidential home environmentthroughput performance evaluation
 Summary | Full Text:PDF(7.2MB)

A Unified Distortion Analysis of Nonlinear Power Amplifiers with Memory Effects for OFDM Signals
Yitao ZHANG Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2010/04/01
Vol. E93-C  No. 4  pp. 489-496
Type of Manuscript:  PAPER
Category: Electromagnetic Theory
Keyword: 
nonlinear power amplifiersmemory effectsspectral regrowthadjacent channel power leakage power ratio (ACPR)error vector magnitude (EVM)orthogonal frequency-division multiplexing (OFDM)complex Gaussian distribution
 Summary | Full Text:PDF(789.5KB)

Topology Design and Performance Evaluation of Wireless Sensor Network Based on MIMO Channel Capacity
Ky LENG Kei SAKAGUCHI Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/01/01
Vol. E93-B  No. 1  pp. 22-28
Type of Manuscript:  PAPER
Category: Network
Keyword: 
WSNMIMO relay networktopology designrelay position
 Summary | Full Text:PDF(462.1KB)

2D MIMO Network Coding with Inter-Route Interference Cancellation
Gia Khanh TRAN Kei SAKAGUCHI Fumie ONO Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/12/01
Vol. E92-B  No. 12  pp. 3665-3675
Type of Manuscript:  Special Section PAPER (Special Section on Dynamic Spectrum Access)
Category: MIMO Mesh Network
Keyword: 
MIMOmesh networknetwork codingcooperative beamforminginter-route interference cancellation
 Summary | Full Text:PDF(1.7MB)

Performance Evaluation of Wireless Sensor Network Based on MIMO Relaying Channel Capacity
KY LENG Kei SAKAGUCHI Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/10/01
Vol. E92-B  No. 10  pp. 3166-3173
Type of Manuscript:  PAPER
Category: Network
Keyword: 
WSNMIMO relay networkrelay positionAFDFspatial correlation
 Summary | Full Text:PDF(624.8KB)

Capacity Analysis of MIMO Rayleigh Channel with Spatial Fading Correlation
Ha Duyen TRUNG Watit BENJAPOLAKUL Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/10/01
Vol. E91-A  No. 10  pp. 2818-2826
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Communication Theory
Keyword: 
ergodic capacityfading channelsmultiple-input multiple-output (MIMO) systemsspatial correlation
 Summary | Full Text:PDF(510.5KB)

On Generalized Feistel Structures Using the Diffusion Switching Mechanism
Taizo SHIRAI Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/08/01
Vol. E91-A  No. 8  pp. 2120-2129
Type of Manuscript:  PAPER
Category: Cryptography and Information Security
Keyword: 
blockcipherdiffusion switching mechanismgeneralized feistel structure
 Summary | Full Text:PDF(516.9KB)

Performance Analysis of the Extended Low Complexity User Scheduling Algorithm over Up-Link Multi-User MIMO OFDMA Systems
Junyi WANG Yuyuan CHANG Chuyu ZHENG Kiyomichi ARAKI ZhongZhao ZHANG 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/01/01
Vol. E91-B  No. 1  pp. 327-329
Type of Manuscript:  LETTER
Category: Wireless Communication Technologies
Keyword: 
multi-user MIMOOFDMAtree-structureuser schedulingsum-rate capacity
 Summary | Full Text:PDF(132.7KB)

Multi-Channel Multi-Stage Transmultiplexing Digital Down Converter and Its Application to RFID (ISO18000-3 mode 2) Reader/Writer
Yuichi NAKAGAWA Kei SAKAGUCHI Hideki KAWAMURA Kyoji OHASHI Masahiro MURAGUCHI Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/01/01
Vol. E91-B  No. 1  pp. 139-146
Type of Manuscript:  Special Section PAPER (Special Section on Cognitive Radio and Spectrum Sharing Technology)
Category: Enabling Technology
Keyword: 
multi-channel multi-stage transmultiplexing digital down convertersoftware defined radioRFIDISO18000-3 mode 2implementation on FPGA
 Summary | Full Text:PDF(1MB)

TR-UWB Systems with Pulse-Position Multi-Pulse Modulation for ECC's and Japan's Radiation Masks
Jakkrapong SUMETHNAPIS Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/10/01
Vol. E90-B  No. 10  pp. 2969-2972
Type of Manuscript:  LETTER
Category: Wireless Communication Technologies
Keyword: 
UWBmulti-userTR-UWBPMMDMPM
 Summary | Full Text:PDF(291KB)

Delay Time Error Effect for Various TR-UWB Systems
Jakkrapong SUMETHNAPIS Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/10/01
Vol. E90-B  No. 10  pp. 2976-2979
Type of Manuscript:  LETTER
Category: Wireless Communication Technologies
Keyword: 
UWBTR-UWBMPMPMMdelay effect
 Summary | Full Text:PDF(159.9KB)

FOREWORD
Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/09/01
Vol. E90-C  No. 9  pp. 1657-1657
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(64.5KB)

A Game Theoretic Framework for Fair-Efficient Threshold Parameters Selection in Call Admission Control for CDMA Mobile Multimedia Systems
Jenjoab VIRAPANICHAROEN Watit BENJAPOLAKUL Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/07/01
Vol. E90-A  No. 7  pp. 1280-1291
Type of Manuscript:  Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks)
Category: 
Keyword: 
call admission controlgame theorycooperative gamearbitration schemeCDMAbargaining problem
 Summary | Full Text:PDF(801KB)

A Low Complexity Tree-Structure Based User Scheduling Algorithm for Up-Link Multi-User MIMO Systems
Junyi WANG Kiyomichi ARAKI Zhongzhao ZHANG Yuyuan CHANG Houtao ZHU Tsuyoshi KASHIMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/06/01
Vol. E90-B  No. 6  pp. 1415-1423
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
MIMOmulti-usertree-structureuser schedulingsum-rate capacity
 Summary | Full Text:PDF(754.6KB)

Development of MIMO-SDR Platform and Its Application to Real-Time Channel Measurements
Kei MIZUTANI Kei SAKAGUCHI Jun-ichi TAKADA Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/12/01
Vol. E89-B  No. 12  pp. 3197-3207
Type of Manuscript:  Special Section PAPER (Special Section on Software Defined Radio Technology and Its Applications)
Category: 
Keyword: 
multiple-input multiple-output (MIMO)software defined radio (SDR)hybrid implementation architecturereal-time channel measurement
 Summary | Full Text:PDF(1.5MB)

A Novel Adaptive Linearization Technique for a Balanced-Amplifier Array
Takana KAHO Yo YAMAGUCHI Tadao NAKAGAWA Katsuhiko ARAKI Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2006/10/01
Vol. E89-C  No. 10  pp. 1448-1453
Type of Manuscript:  PAPER
Category: Microwaves, Millimeter-Waves
Keyword: 
adaptive linearizationlinearizermulti-port amplifierpower amplifiersarray antenna
 Summary | Full Text:PDF(689.4KB)

Two Low Complexity Receiver Structures for Down-Link OFDMA Systems
Junyi WANG Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/08/01
Vol. E89-B  No. 8  pp. 2254-2256
Type of Manuscript:  LETTER
Category: Wireless Communication Technologies
Keyword: 
OFDMAmulti-userdown-linkcomplexity
 Summary | Full Text:PDF(208KB)

FOREWORD
Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2006/04/01
Vol. E89-C  No. 4  pp. 445-445
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(69.7KB)

Multiple Access in TR-UWB System Using Differential Multi-Pulse Modulation
Jakkrapong SUMETHNAPIS Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/04/01
Vol. E89-B  No. 4  pp. 1305-1314
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
UWBTransmit Reference (TR-UWB)DTR-UWBMulti-Pulse Modulation (MPM)DMPM and SCR
 Summary | Full Text:PDF(561.5KB)

Prototype Implementation of Real-Time ML Detectors for Spatial Multiplexing Transmission
Toshiaki KOIKE Yukinaga SEKI Hidekazu MURATA Susumu YOSHIDA Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/03/01
Vol. E89-B  No. 3  pp. 845-852
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
multiple-input multiple-output (MIMO)spatial multiplexingmaximum-likelihood detection (MLD)field programmable gate array (FPGA)real-time MIMO detector
 Summary | Full Text:PDF(770.2KB)

Pilot Symbol Aided MAP-Based 3D Channel Estimation for Multi-User MIMO-OFDM Systems
Junyi WANG Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/03/01
Vol. E89-B  No. 3  pp. 801-808
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
MIMOOFDMmulti-userchannel estimationMAP
 Summary | Full Text:PDF(562.9KB)

QPSK Impulse Signal Transmission for Ultra Wide Band Communication Systems in Multipath Channel Environments
Chaiyaporn KHEMAPATAPAN Watit BENJAPOLAKUL Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/11/01
Vol. E88-A  No. 11  pp. 3100-3109
Type of Manuscript:  Special Section PAPER (Special Section on Wide Band Systems)
Category: 
Keyword: 
ultra widebanddirect-sequencetime-hoppingQPSK modulationPPM modulationmultipath channel
 Summary | Full Text:PDF(509.5KB)

MIMO Channel Capacity in an Indoor Line-Of-Sight (LOS) Environment
Kei SAKAGUCHI Hai-Yeow-Eugene CHUA Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/07/01
Vol. E88-B  No. 7  pp. 3010-3019
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
MIMO channel capacityline-of-sight (LOS)antenna correlationRicean K factormeasurement experiment
 Summary | Full Text:PDF(629.5KB)

Six-Port Direct Conversion Receiver: Novel Calibration for Multi-Port Nonlinear Circuits
Atsushi HONDA Kei SAKAGUCHI Jun-ichi TAKADA Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2004/09/01
Vol. E87-C  No. 9  pp. 1532-1539
Type of Manuscript:  Special Section PAPER (Special Section on Wave Technologies for Wireless and Optical Communications)
Category: Components and Devices
Keyword: 
software defined radiosix-port direct conversion receivernonlinearity calibration
 Summary | Full Text:PDF(440.7KB)

Performance Analysis of MIMO Eigenmode Transmission System under Realistic Channel and System Conditions
Seeho TING Kei SAKAGUCHI Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2004/08/01
Vol. E87-B  No. 8  pp. 2222-2232
Type of Manuscript:  PAPER
Category: Wireless Communication Technology
Keyword: 
MIMOeigenmode transmissionimperfect channel estimationdelayed quantized feedbackspatial correlationcontinuous fading channel
 Summary | Full Text:PDF(364.8KB)

A Low Power Programmable Turbo Decoder Macro Using the SOVA Algorithm
Hirohisa GAMBE Kazuhisa OHBUCHI Teruo ISHIHARA Takaaki ZAKOJI Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2004/04/01
Vol. E87-C  No. 4  pp. 510-519
Type of Manuscript:  Special Section PAPER (Special Section on Low-Power System LSI, IP and Related Technologies)
Category: 
Keyword: 
turbo codingSOVAViterbi algorithmtrace backMAX-LOG-MAPsliding window
 Summary | Full Text:PDF(960.8KB)

Influence of Frequency Characteristics of RF Circuits in Digital Predistortion Type Linearizer System on Adjacent Channel Leakage Ratio for W-CDMA Power Amplifier
Takeshi TAKANO Toru MANIWA Yasuyuki OISHI Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/02/01
Vol. E87-A  No. 2  pp. 324-329
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics)
Category: 
Keyword: 
digital predistortionlinearizerW-CDMApower amplifierACLR
 Summary | Full Text:PDF(1006.5KB)

ACU and RSM Based Radio Spectrum Management for Realization of Flexible Software Defined Radio World
Kei SAKAGUCHI Chih FUNG LAM Tien Dzung DOAN Munkhtur TOGOOCH Jun-ichi TAKADA Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/12/01
Vol. E86-B  No. 12  pp. 3417-3424
Type of Manuscript:  Special Section PAPER (Special Issue on Software Defined Radio Technology and Its Applications)
Category: 
Keyword: 
software defined radio (SDR)spectrum managementautomatic calibration and certification unitradio security moduleGPS
 Summary | Full Text:PDF(517.2KB)

Performance of MUSIC and ESPRIT for Joint Estimation of DOA and Angular Spread in Slow Fading Environment
Jung-Sik JEONG Kei SAKAGUCHI Jun-ichi TAKADA Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/05/01
Vol. E85-B  No. 5  pp. 972-977
Type of Manuscript:  Special Section LETTER (Wireless Communications Issue)
Category: 
Keyword: 
DOAangular spreadlocal scatteringMUSICESPRIT
 Summary | Full Text:PDF(326.8KB)

A Novel Architecture for MIMO Spatio-Temporal Channel Sounder
Kei SAKAGUCHI Jun-ichi TAKADA Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2002/03/01
Vol. E85-C  No. 3  pp. 436-441
Type of Manuscript:  Special Section PAPER (Special Issue on Signals, Systems and Electronics Technology)
Category: Digital Transmission
Keyword: 
mobile propagationchannel sounderMIMO channel responsechannel parameter estimationhardware implementation
 Summary | Full Text:PDF(435.1KB)

Optimal Signal Combining Based on DOA and Angular Spread Using Extended Array Mode Vector
Jung-Sik JEONG Kei SAKAGUCHI Jun-ichi TAKADA Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/11/01
Vol. E84-B  No. 11  pp. 3023-3032
Type of Manuscript:  PAPER
Category: Antenna and Propagation
Keyword: 
DCMPzero-forcingsignal copyoptimal beamformingangular spread
 Summary | Full Text:PDF(561.3KB)

Generalization of MUSIC Using Extended Array Mode Vector for Joint Estimation of Instantaneous DOA and Angular Spread
Jung-Sik JEONG Kei SAKAGUCHI Kiyomichi ARAKI Jun-ichi TAKADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/07/01
Vol. E84-B  No. 7  pp. 1781-1789
Type of Manuscript:  Special Section PAPER (Special Issue on Adaptive Array Antenna Techniques for Advanced Wireless Communications)
Category: Adaptive Algorithms and Experiments
Keyword: 
array mode vectorspatial signatureangular spreadDOAMUSIC
 Summary | Full Text:PDF(714.2KB)

The Problem of the Fading Model Selection
Marcelo Agustin TANEDA Jun-ichi TAKADA Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/03/01
Vol. E84-B  No. 3  pp. 660-666
Type of Manuscript:  PAPER
Category: Sensing
Keyword: 
fading modelspropagation modelRayleighRiceNakagamiWeibullfading model selectionMDL principle
 Summary | Full Text:PDF(253.9KB)

A Ray-Tracing-Based Characterization and Verification of the Spatio-Temporal Channel Model for Future Wideband Wireless Systems
Houtao ZHU Jun-ichi TAKADA Kiyomichi ARAKI Takehiko KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/03/01
Vol. E84-B  No. 3  pp. 644-652
Type of Manuscript:  PAPER
Category: Antenna and Propagation
Keyword: 
channel modelingspatio-temporal channel modelray-tracingrandom-phase approach
 Summary | Full Text:PDF(1MB)

An Optimization of Smoothing Preprocessing for Correlated Signal Parameter Estimation
Kei SAKAGUCHI Jun-ichi TAKADA Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2000/09/25
Vol. E83-B  No. 9  pp. 2117-2123
Type of Manuscript:  PAPER
Category: Antenna and Propagation
Keyword: 
subspace-based superresolution algorithmcorrelated signalsmoothing preprocessingoptimizationsmoothed equivalent diversity profile
 Summary | Full Text:PDF(804.2KB)

Software Receiver Technology and Its Applications
Tokihiko YOKOI Yoshimitsu IKI Jun HORIKOSHI Katsuji MIWA Yoshio KARASAWA Akira FUKUDA Jun-ichi TAKADA Yuichi KURODA Takayasu SHIOKAWA Yukitsuna FURUYA Shigenari SUZUKI Yasuhiro SENBA Yoshihide YAMADA Hiroshi HARADA Yasuo SUZUKI Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2000/06/25
Vol. E83-B  No. 6  pp. 1200-1209
Type of Manuscript:  Special Section PAPER (Special Issue on Software Defined Radio and Its Technologies)
Category: 
Keyword: 
software receiversoftware radio
 Summary | Full Text:PDF(2.1MB)

Prehistory of the SDR Studies in Japan --A Role of ARIB Study Group--
Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2000/06/25
Vol. E83-B  No. 6  pp. 1183-1188
Type of Manuscript:  INVITED PAPER (Special Issue on Software Defined Radio and Its Technologies)
Category: 
Keyword: 
software defined radiomobile communicationsprogrammable devicesAD converters
 Summary | Full Text:PDF(305.8KB)

FOREWORD
Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2000/06/25
Vol. E83-B  No. 6  pp. 1163-1164
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(105.6KB)

Application of the VLC Parallel Transmission Technique to Motion Vector Transmission
Takashi KASAI Yukitoshi SANADA Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/12/25
Vol. E82-A  No. 12  pp. 2778-2782
Type of Manuscript:  Special Section LETTER (Special Section on Spread Spectrum Techniques and Applications)
Category: 
Keyword: 
multicodeH.263video imagespread spectrumvariable length code
 Summary | Full Text:PDF(1.2MB)

A Model Order Estimation in the Matrix Pencil Method for the Transient Response of a Microwave Circuit Discontinuity
Manabu KITAMURA Jun-ichi TAKADA Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1999/11/25
Vol. E82-C  No. 11  pp. 2081-2086
Type of Manuscript:  PAPER
Category: Microwave and Millimeter Wave Technology
Keyword: 
FDTDMatrix-Pencil methodGPOFmicrostrip line discontinuitymodel order estimationMDL
 Summary | Full Text:PDF(684.9KB)

Influence of the Model Order Estimation Error in the ESPRIT Based High Resolution Techniques
Kei SAKAGUCHI Jun-ichi TAKADA Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1999/03/25
Vol. E82-B  No. 3  pp. 561-563
Type of Manuscript:  LETTER
Category: Antennas and Propagation
Keyword: 
TLS-ESPRIT algorithmmodel order estimation errormultipath parameter estimationoverestimation of the model order
 Summary | Full Text:PDF(206.4KB)

A Novel Cumulant Based MUSIC Like DOA Estimation Algorithm with Multicarrier Modulation
Yukitoshi SANADA Junichi TAKADA Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/12/25
Vol. E81-B  No. 12  pp. 2318-2325
Type of Manuscript:  Special Section PAPER (Special Issue on the Latest Development of Telecommunication Research)
Category: Wireless Communication Systems
Keyword: 
DOA estimationMUSICcumulantmulticarrier
 Summary | Full Text:PDF(607.6KB)

Performance of Adaptive Array Antennas with Multicarrier DS/CDMA in a Mobile Fading Environment
Yukitoshi SANADA Michael PADILLA Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/07/25
Vol. E81-B  No. 7  pp. 1392-1400
Type of Manuscript:  Special Section PAPER (Special Issue on Third Generation Land Mobile Communication Systems)
Category: 
Keyword: 
software radioadaptive antennasmulticarrierDS/CDMA
 Summary | Full Text:PDF(690.7KB)

A Variable Length Code Transmission Technique on Multicode DS/SS Systems
Yukitoshi SANADA Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/03/25
Vol. E81-B  No. 3  pp. 625-636
Type of Manuscript:  PAPER
Category: Radio Communication
Keyword: 
variable length codemulticode DS/SSimage transmission
 Summary | Full Text:PDF(845.6KB)

On Construction of Signature Scheme over a Certain Non-Commutative Ring
Takakazu SATOH Kiyomichi ARAKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1997/01/25
Vol. E80-A  No. 1  pp. 40-45
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
OSS digital signatureintegral quaternionnon-commutativitycryptanalysis
 Summary | Full Text:PDF(512.3KB)

Attacking Method on Tanaka's Scheme**
Kiyomichi ARAKI Masato NAKAO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 1996/03/25
Vol. E79-D  No. 3  pp. 247-248
Type of Manuscript:  LETTER
Category: Information Security
Keyword: 
key sharing schemecollusion attackShalkwijk algorithmlinear algebra
 Summary | Full Text:PDF(119.5KB)

On Ambiguity in Coppersmith' Attacking Method a against NIKS-TAS Scheme
Shigeo TSUJII Kiyomichi ARAKI Masao KASAHARA Eiji OKAMOTO Ryuichi SAKAI Yasuo MAEDA Tomohiko YAGISAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1996/01/25
Vol. E79-A  No. 1  pp. 66-75
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: 
Keyword: 
modulo degeneracycryptanalysisID-based key sharingNIKS-TAS
 Summary | Full Text:PDF(762.2KB)

The Comparison between the Linear Optimal Restoration Filter and MEM Restoration Filter
Kiyomichi ARAKI Toshihiko HASHIMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1993/08/25
Vol. E76-A  No. 8  pp. 1353-1355
Type of Manuscript:  LETTER
Category: Digital Image Processing
Keyword: 
image restorationMEMprojection filter
 Summary | Full Text:PDF(131.7KB)

The Efficient GMD Decoders for BCH Codes
Kiyomichi ARAKI Masayuki TAKADA Masakatsu MORII 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 1993/05/25
Vol. E76-D  No. 5  pp. 594-604
Type of Manuscript:  Special Section PAPER (Special Issue on Multiple-Valued Logic)
Category: Error Correcting Codes
Keyword: 
error correcting technologyGMD decodingBCH codes
 Summary | Full Text:PDF(507.2KB)

On a Recursive Form of Welch-Berlekamp Algorithm
Kiyomichi ARAKI Masayuki TAKADA Masakatu MORII 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1993/01/25
Vol. E76-A  No. 1  pp. 132-138
Type of Manuscript:  PAPER
Category: Information Theory and Coding Theory
Keyword: 
information theory and coding theoryWelch-Berlekamp algorithmhalving-doubling strategyrecursive structure
 Summary | Full Text:PDF(379.8KB)

Generalized Syndrome Polynomials for Decoding Reed-Solomon Codes
Kiyomichi ARAKI Ikuo FUJITA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1992/08/25
Vol. E75-A  No. 8  pp. 1026-1029
Type of Manuscript:  LETTER
Category: Information Theory and Coding Theory
Keyword: 
generalized syndrome polynomialsReed-Solomon codesdecoding algorithmkey equation
 Summary | Full Text:PDF(200.5KB)

On the Conspiracy Problem of the Generalized Tanaka's Cryptosystem
Kiyomichi ARAKI Takashi SEKINE 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1991/08/25
Vol. E74-A  No. 8  pp. 2176-2178
Type of Manuscript:  Special Section LETTER (Special Issue on Cryptography and Information Security)
Category: 
Keyword: 
 Summary | Full Text:PDF(163.4KB)

Modified Euclidean Algorithm Having High Modularity and Minimum Register Organization
Kiyomichi ARAKI Ikuo FUJITA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1991/04/25
Vol. E74-A  No. 4  pp. 731-737
Type of Manuscript:  PAPER
Category: Information Theory and Coding Theory
Keyword: 
 Summary | Full Text:PDF(383.7KB)

Piecewise Linear Analysis of Autonomous Josephson Junction Circuits
Keiji AKIYAMA Kiyomichi ARAKI Mititada MORISUE 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1990/12/25
Vol. E73-E  No. 12  pp. 2022-2027
Type of Manuscript:  PAPER
Category: Nonlinear Problems
Keyword: 
 Summary | Full Text:PDF(357.3KB)

Fast Inverters over Finite Field Based on Euclid's Algorithm
Kiyomichi ARAKI Ikuo FUJITA Mititada MORISUE 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1989/11/25
Vol. E72-E  No. 11  pp. 1230-1234
Type of Manuscript:  PAPER
Category: Computer Hardware Design
Keyword: 
 Summary | Full Text:PDF(333.1KB)

A Comment on a Modulation Enhancement of Electronic Phase Shifter Employing a Multilayer Dielectric-Waveguide Structure
Kiyomichi ARAKI Yoshiyuki NAITO 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1982/04/25
Vol. E65-E  No. 4  pp. 208-209
Type of Manuscript:  LETTER
Category: Optical and Quantum Electronics
Keyword: 
 Summary | Full Text:PDF(111.1KB)

Canonical Representation and Figure of Merit of Circulator
Kiyomichi ARAKI Yoshiyuki NAITO 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1981/09/25
Vol. E64-E  No. 9  pp. 583-590
Type of Manuscript:  PAPER
Category: Microwaves and Millimeter Waves
Keyword: 
 Summary | Full Text:PDF(449.5KB)

A Novel Energy Relation in Eigen Modes of Transmission Line and Its Application to the Derivation of Variational Expression for Propagation Constant
Kiyomichi ARAKI Yoshiyuki NAITO 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1980/02/25
Vol. E63-E  No. 2  pp. 116-117
Type of Manuscript:  LETTER
Category: Electromagnetic Theory, Mathematics, Pyhsics
Keyword: 
 Summary | Full Text:PDF(146.9KB)

New Edge Guided Mode Devices
Kiyomichi ARAKI Tetsu KOYAMA Yoshiyuki NAITO 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1976/04/25
Vol. E59-E  No. 4  pp. 1-8
Type of Manuscript:  PAPER
Category: Microwaves and Millimeter Waves
Keyword: 
 Summary | Full Text:PDF(498.7KB)