Jun-ichi TAKADA


3-Port MIMO DRAs for 2.4GHz WLAN Communications
Katsunori ISHIMIYA Chi-Yuk CHIU Zhinong YING Jun-ichi TAKADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2016/09/01
Vol. E99-B  No. 9  pp. 2047-2054
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
DRAMIMOfinite integration techniquewireless LANIEEE 802.11n
 Summary | Full Text:PDF(1.5MB)

Human Motion Classification Using Radio Signal Strength in WBAN
Sukhumarn ARCHASANTISUK Takahiro AOYAGI Tero UUSITUPA Minseok KIM Jun-ichi TAKADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2016/03/01
Vol. E99-B  No. 3  pp. 592-601
Type of Manuscript:  Special Section PAPER (Special Section on Information and Communication Technology for Healthcare and Medical Applications in Conjunction with Main Topics of ISMICT2015)
Category: 
Keyword: 
human motionsclassificationradio signal strengthWBANsimulation
 Summary | Full Text:PDF(2MB)

Propagation Channel Interpolation for Fingerprint-Based Localization of Illegal Radios
Azril HANIZ Gia Khanh TRAN Ryosuke IWATA Kei SAKAGUCHI Jun-ichi TAKADA Daisuke HAYASHI Toshihiro YAMAGUCHI Shintaro ARATA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2015/12/01
Vol. E98-B  No. 12  pp. 2508-2519
Type of Manuscript:  PAPER
Category: Sensing
Keyword: 
propagation channelfrequency interpolationspatial interpolationurban environmentillegal radiolocalizationfingerprint
 Summary | Full Text:PDF(3.1MB)

Cooperative Relaying Channel and Outage Performance in Narrowband Wireless Body Area Network
Karma WANGCHUK Minseok KIM Jun-ichi TAKADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2015/04/01
Vol. E98-B  No. 4  pp. 554-564
Type of Manuscript:  Special Section PAPER (Special Section on Innovation of Medical Information and Communication Technology for Dependable Society)
Category: 
Keyword: 
body area networkmulti-link channelcooperative communicationincremental relayingoutage probability
 Summary | Full Text:PDF(1.4MB)

EM-Based Recursive Estimation of Spatiotemporal Correlation Statistics for Non-stationary MIMO Channel
Yousuke NARUSE Jun-ichi TAKADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2015/02/01
Vol. E98-B  No. 2  pp. 324-334
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
MIMOchannel estimationGauss-Markov modelKalman filterEM algorithmposterior probability
 Summary | Full Text:PDF(997KB)

Versatile Radio Channel Sounder for Double Directional and Multi-link MIMO Channel Measurements at 11 GHz
Yohei KONISHI Yuyuan CHANG Minseok KIM Jun-ichi TAKADA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/10/01
Vol. E97-C  No. 10  pp. 994-1004
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Microwave and Millimeter-wave Technologies)
Category: 
Keyword: 
channel soundingmultiple-input-multiple-output (MIMO) systemmulti-linkmicrowave propagation
 Summary | Full Text:PDF(4.1MB)

A Spatial Fading Emulator for Evaluation of MIMO Antennas in a Cluster Environment
Tsutomu SAKATA Atsushi YAMAMOTO Koichi OGAWA Hiroshi IWAI Jun-ichi TAKADA Kei SAKAGUCHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/10/01
Vol. E97-B  No. 10  pp. 2127-2135
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Measurement and Design Techniques on Antennas, Propagation and Wireless Systems)
Category: 
Keyword: 
fading emulatorclusterangular power spectrumOTAhandset antennaMIMOchannel capacity
 Summary | Full Text:PDF(2.4MB)

Pattern Reconstruction for Deviated AUT in Spherical Measurement by Using Spherical Waves
Yang MIAO Jun-ichi TAKADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/01/01
Vol. E97-B  No. 1  pp. 105-113
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
antenna pattern reconstructionspherical wave expansiondeviated AUTtranslational phase shiftrotation and translation of spherical waves
 Summary | Full Text:PDF(1.7MB)

Spectral Correlation Based Blind Automatic Modulation Classification Using Symbol Rate Estimation
Azril HANIZ Minseok KIM Md. Abdur RAHMAN Jun-ichi TAKADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2013/05/01
Vol. E96-B  No. 5  pp. 1158-1167
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
modulationclassificationsymbol rateestimationcyclostationarityspectral correlation
 Summary | Full Text:PDF(1.8MB)

Robustness in Supervised Learning Based Blind Automatic Modulation Classification
Md. Abdur RAHMAN Azril HANIZ Minseok KIM Jun-ichi TAKADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2013/04/01
Vol. E96-B  No. 4  pp. 1030-1038
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
automatic modulation classification (AMC)emergency radiomobile radioCFOsymbol ratedenoisingEMDdecision tree
 Summary | Full Text:PDF(1.3MB)

Implementation of Reflection on Curved Surfaces and Physical Optics in Ray Tracing for Tunnel Propagation
Yukiko KISHIKI Jun-ichi TAKADA Gilbert Siy CHING Hajime TAKAO Yoshihiro SUGIHARA Shigeaki MATSUNAGA Fumiya UESAKA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2013/01/01
Vol. E96-C  No. 1  pp. 42-50
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Electromagnetic Theory and Its Application)
Category: Radiowave Propagation
Keyword: 
ray tracingphysical opticsrough surfacescurved reflectiontunnel propagationcaustics
 Summary | Full Text:PDF(1.9MB)

Analysis of Effect of User Misbehaviours on the Reservation-Based MAC Protocols in Wireless Communication Networks
Norrarat WATTANAMONGKHOL Warakorn SRICHAVENGSUP Pisit VANICHCHANUNT Robithoh ANNUR Jun-ichi TAKADA Lunchakorn WUTTISITTIKULKIJ 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/09/01
Vol. E95-B  No. 9  pp. 2794-2806
Type of Manuscript:  PAPER
Category: Network
Keyword: 
channel reservationMAC protocolsselfish usersmisbehaviourswireless networks
 Summary | Full Text:PDF(2.8MB)

Automatic IQ Imbalance Compensation Technique for Quadrature Modulator by Single-Tone Testing
Minseok KIM Yohei KONISHI Jun-ichi TAKADA Boxin GAO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/05/01
Vol. E95-B  No. 5  pp. 1864-1868
Type of Manuscript:  LETTER
Category: Wireless Communication Technologies
Keyword: 
quadrature modulatorIQ imbalanceimage distortionsteepest descentspectrum analyzer
 Summary | Full Text:PDF(259.8KB)

Performance Enhancement of Multi-Cyclic Detector for Cognitive Radios with an OFDM Primary System
Minseok KIM Kimtho PO Jun-ichi TAKADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/03/01
Vol. E95-B  No. 3  pp. 950-960
Type of Manuscript:  PAPER
Category: Terrestrial Wireless Communication/Broadcasting Technologies
Keyword: 
cognitive radiospectrum sensingcyclostationaritycyclic detectormaximum ratio combiningOFDMIEEE 802.22
 Summary | Full Text:PDF(836.1KB)

Optimum Threshold for Indoor UWB ToA-Based Ranging
Marzieh DASHTI Mir GHORAISHI Katsuyuki HANEDA Jun-ichi TAKADA Kenichi TAKIZAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/10/01
Vol. E94-A  No. 10  pp. 2002-2012
Type of Manuscript:  PAPER
Category: Spread Spectrum Technologies and Applications
Keyword: 
rangingpositioningultra-wide-bandtime-of-arrival estimationdetection
 Summary | Full Text:PDF(1.2MB)

Numerical Simulations for Wearable BAN Propagation Channel during Various Human Movements
Takahiro AOYAGI Minseok KIM Jun-ichi TAKADA Kiyoshi HAMAGUCHI Ryuji KOHNO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2011/09/01
Vol. E94-B  No. 9  pp. 2496-2500
Type of Manuscript:  Special Section LETTER (Special Section on Information Communication Technology for Highly Reliable Human Health Care Services)
Category: 
Keyword: 
body area networkmedical supporthealthcare serviceelectromagnetic wave propagationdynamic channel model
 Summary | Full Text:PDF(328.6KB)

Waveform Distortion and Transmission Gain on Ultra Wideband Impulse Radio
Sathaporn PROMWONG Pichaya SUPANAKOON Jun-ichi TAKADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/10/01
Vol. E93-B  No. 10  pp. 2644-2650
Type of Manuscript:  Special Section PAPER (Special Section on Advanced Technologies in Antennas and Propagation in Conjunction with Main Topics of ISAP2009)
Category: Radio Systems
Keyword: 
ultra wideband impulse radio (UWB-IR)Friis' transmission formulaantennadistortiontransmission gain
 Summary | Full Text:PDF(809KB)

Development of an Implantable WBAN Path-Loss Model for Capsule Endoscopy
Takahiro AOYAGI Kenichi TAKIZAWA Takehiko KOBAYASHI Jun-ichi TAKADA Kiyoshi HAMAGUCHI Ryuji KOHNO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/04/01
Vol. E93-B  No. 4  pp. 846-849
Type of Manuscript:  Special Section LETTER (Special Section on Information and Communication Technology for Wellness and Medical Applications)
Category: 
Keyword: 
wireless body area network (WBAN)implantable WBANcapsule endoscopypath loss model
 Summary | Full Text:PDF(220.9KB)

FOREWORD
Jun-ichi TAKADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/12/01
Vol. E92-B  No. 12  pp. 3571-3571
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(54.3KB)

Signal Subspace Interpolation from Discrete Measurement Samples in Constructing a Database for Location Fingerprint Technique
Panarat CHERNTANOMWONG Jun-ichi TAKADA Hiroyuki TSUJI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/09/01
Vol. E92-B  No. 9  pp. 2922-2930
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
localizationfingerprint techniquearray antennasignal subspace
 Summary | Full Text:PDF(795.6KB)

Iterative Channel Estimation in MIMO Antenna Selection Systems for Correlated Gauss-Markov Channel
Yousuke NARUSE Jun-ichi TAKADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/03/01
Vol. E92-B  No. 3  pp. 922-932
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
MIMOchannel estimationGauss-Markov modelKalman filterMIMO antenna selection systemoptimal training symbol design
 Summary | Full Text:PDF(565.4KB)

Channel Model on Various Frequency Bands for Wearable Body Area Network
Norihiko KATAYAMA Kenichi TAKIZAWA Takahiro AOYAGI Jun-ichi TAKADA Huan-Bang LI Ryuji KOHNO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/02/01
Vol. E92-B  No. 2  pp. 418-424
Type of Manuscript:  Special Section PAPER (Special Section on Medical Information and Communications Technologies)
Category: 
Keyword: 
body area network (BAN)wearable BAN channel modelpath loss model
 Summary | Full Text:PDF(1.3MB)

Experimental Analysis and Site-Specific Modeling of Channel Parameters at Mobile Station in an Urban Macrocellular Environment
Kriangsak SIVASONDHIVAT Jun-ichi TAKADA Ichirou IDA Yasuyuki OISHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/04/01
Vol. E91-B  No. 4  pp. 1132-1144
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
double directional measurementangular-delay PSD channel model
 Summary | Full Text:PDF(1022KB)

Effects of Bragg Scattering on Ultra-Wideband Signal Transmission from Periodic Surfaces
Hiroaki TSUCHIYA Navarat LERTSIRISOPON Jun-ichi TAKADA Takehiko KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/02/01
Vol. E91-B  No. 2  pp. 536-542
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
Bragg scatteringultra-widebandUWB transmissionpropagation
 Summary | Full Text:PDF(908.8KB)

Proposal of Receive Antenna Selection Methods for MIMO-OFDM System
Quoc Tuan TRAN Shinsuke HARA Kriangsak SIVASONDHIVAT Jun-ichi TAKADA Atsushi HONDA Yuuta NAKAYA Kaoru YOKOO Ichirou IDA Yasuyuki OISHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/02/01
Vol. E91-B  No. 2  pp. 505-517
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
MIMO-OFDMMMSERF switchpolarizationantenna selectionIEEE 802.11n
 Summary | Full Text:PDF(1.5MB)

Accurate Angle-of-Arrival Estimation Method in Real System by Applying Calibration and Spatial Smoothing
Panarat CHERNTANOMWONG Jun-ichi TAKADA Hiroyuki TSUJI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/10/01
Vol. E90-B  No. 10  pp. 2915-2925
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
AOA estimationcalibrationspatial smoothing
 Summary | Full Text:PDF(564.9KB)

Performance Evaluation of Built-In Small LF Antennas inside a Metal Case
Kazuaki ABE Jun-ichi TAKADA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/09/01
Vol. E90-C  No. 9  pp. 1784-1792
Type of Manuscript:  Special Section PAPER (Special Section on Microwave and Millimeter-Wave Technology)
Category: Antennas/Systems
Keyword: 
magnetic core loop antennaamorphous metalLFmagnetic field simulation
 Summary | Full Text:PDF(937.4KB)

Simulation and Design of a Very Small Magnetic Core Loop Antenna for an LF Receiver
Kazuaki ABE Jun-ichi TAKADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/01/01
Vol. E90-B  No. 1  pp. 122-130
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
magnetic core loop antennaLFtime standardantenna factormagnetic field simulation
 Summary | Full Text:PDF(1MB)

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)

Overview of Research, Development, Standardization, and Regulation Activities in NICT UWB Project
Ken-ichi TAKIZAWA Huan-Bang LI Iwao NISHIYAMA Jun-ichi TAKADA Ryuji KOHNO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/11/01
Vol. E89-A  No. 11  pp. 2996-3005
Type of Manuscript:  INVITED PAPER (Special Section on Wide Band Systems)
Category: 
Keyword: 
UWBsoft spectrum adaptation (SSA)coexistencedetection and avoidance (DAA)spectrum maskITU-R TG1/8radar
 Summary | Full Text:PDF(1.3MB)

Investigation of Ultra-Wideband Propagation Channel based on a Cluster Scheme
Hiroaki TSUCHIYA Katsuyuki HANEDA Jun-ichi TAKADA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/11/01
Vol. E89-A  No. 11  pp. 3095-3102
Type of Manuscript:  Special Section PAPER (Special Section on Wide Band Systems)
Category: 
Keyword: 
Ultra Widebanddouble directionalUWB channel modelcluster
 Summary | Full Text:PDF(1.2MB)

Performance Evaluation for RF-Combining Diversity Antenna Configured with Variable Capacitors
Hiroya TANAKA Jun-ichi TAKADA Ichirou IDA Yasuyuki OISHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2006/04/01
Vol. E89-C  No. 4  pp. 488-494
Type of Manuscript:  Special Section PAPER (Special Section on Advanced RF Technologies for Compact Wireless Equipment and Mobile Phones)
Category: 
Keyword: 
mobile systemsadaptive array antennasdiversity antennasvariable capacitorRF-combining diversity antennasperturbation methodsteepest gradient method
 Summary | Full Text:PDF(635.5KB)

Spatial Fading Simulator Using a Cavity-Excited Circular Array (CECA) for Performance Evaluation of Antenna Arrays
Chulgyun PARK Jun-ichi TAKADA Kei SAKAGUCHI Takashi OHIRA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/03/01
Vol. E89-B  No. 3  pp. 906-913
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
spatial fading simulatorcavityCECAantenna array performance evaluation
 Summary | Full Text:PDF(1.1MB)

Measurement Techniques of Emissions from Ultra Wideband Devices
Jun-ichi TAKADA Shinobu ISHIGAMI Juichi NAKADA Eishin NAKAGAWA Masaharu UCHINO Tetsuya YASUI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/09/01
Vol. E88-A  No. 9  pp. 2252-2263
Type of Manuscript:  INVITED PAPER (Special Section on Ultra Wideband Systems)
Category: 
Keyword: 
UWB devicesmeasurementITU-R
 Summary | Full Text:PDF(676.1KB)

Double Directional Ultra Wideband Channel Characterization in a Line-of-Sight Home Environment
Katsuyuki HANEDA Jun-ichi TAKADA Takehiko KOBAYASHI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/09/01
Vol. E88-A  No. 9  pp. 2264-2271
Type of Manuscript:  Special Section PAPER (Special Section on Ultra Wideband Systems)
Category: Propagation
Keyword: 
ultra widebandUWB channel modelsSAGE algorithmspatio-temporal analysis
 Summary | Full Text:PDF(1.3MB)

Experimental Determination of Propagation Paths for the ETC System--Equipment Development and Field Test--
Katsuyuki HANEDA Jun-ichi TAKADA Takeo IWATA Yoshitaka WAKINAKA Takeshi KUNISHIMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/11/01
Vol. E87-A  No. 11  pp. 3008-3015
Type of Manuscript:  PAPER
Category: Intelligent Transport System
Keyword: 
ETCDSRCpropagationshort range wireless communicationmeasurement systempath determination3-D unitary ESPRITSAGE algorithm
 Summary | Full Text:PDF(444.2KB)

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)

Experimental Study of Non-specular Wave Scattering from Building Surface Roughness for the Mobile Propagation Modeling
Hary BUDIARTO Kenshi HORIHATA Katsuyuki HANEDA Jun-ichi TAKADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2004/04/01
Vol. E87-B  No. 4  pp. 958-966
Type of Manuscript:  PAPER
Category: Antenna and Propagation
Keyword: 
mobile propagationsurface roughnessnon-specular scatteringsignal processingESPRIT
 Summary | Full Text:PDF(823.7KB)

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)

ICA Based Blind Source Separation Applied to Radio Surveillance
Edgar CARLOS Jun-ichi TAKADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/12/01
Vol. E86-B  No. 12  pp. 3491-3497
Type of Manuscript:  Special Section PAPER (Special Issue on Software Defined Radio Technology and Its Applications)
Category: 
Keyword: 
HFarray antennaBSSULA
 Summary | Full Text:PDF(959.3KB)

Field Trial of a Space-Time Equalizer for TDMA Mobile Communications in a Suburban Micro-Cell Environment
Takeshi TODA Yuukichi AIHARA Yukiyoshi KAMIO Jun-ichi TAKADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/06/01
Vol. E86-B  No. 6  pp. 1954-1960
Type of Manuscript:  PAPER
Category: Wireless Communication Technology
Keyword: 
delay spreadenvelope cross-correlationinter-symbol interferencespace and path diversityspace-time equalizerTDMA mobile communications
 Summary | Full Text:PDF(1.3MB)

Impedance Characteristic Analysis of an Axial Slot Antenna on a Sectoral Cylindrical Cavity Excited by a Probe Using Method of Moments
Rangsan WONGSAN Chuwong PHONGCHAROENPANICH Monai KRAIRIKSH Jun-ichi TAKADA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/06/01
Vol. E86-A  No. 6  pp. 1364-1373
Type of Manuscript:  Special Section PAPER (Special Section on Papers Selected from 2002 International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC 2002))
Category: 
Keyword: 
sectoral cylindrical cavitydyadic green functionslot antennainput impedance
 Summary | Full Text:PDF(734.5KB)

A New Technique of Reduction of MEI Coefficient Computation Time for Scattering Problems
N. M. Alam CHOWDHURY Jun-ichi TAKADA Masanobu HIROSE 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/04/01
Vol. E86-A  No. 4  pp. 950-953
Type of Manuscript:  LETTER
Category: Engineering Acoustics
Keyword: 
MEI techniquematrix localization techniqueSIE-MEI method
 Summary | Full Text:PDF(479KB)

Novel Formulation for the Scalar-Field Approach of IE-MEI Method to Solve the Three-Dimensional Scattering Problem
N. M. Alam CHOWDHURY Jun-ichi TAKADA Masanobu HIROSE 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2002/08/01
Vol. E85-A  No. 8  pp. 1905-1912
Type of Manuscript:  PAPER
Category: Ultrasonics
Keyword: 
IE-MEISIE-MEIscalar reciprocity relation3D acoustic problemnumerical technique for 3D scattering problem
 Summary | Full Text:PDF(786.5KB)

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)

A Polarization Diversity PIFA on Portable Telephone and the Human Body Effects on Its Performance
Komsak MEKSAMOOT Monai KRAIRIKSH Jun-ichi TAKADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/09/01
Vol. E84-B  No. 9  pp. 2460-2467
Type of Manuscript:  Special Section PAPER (Special Issue on Innovation in Antennas and Propagation for Expanding Radio Systems)
Category: Mobile Antennas
Keyword: 
polarization diversityPIFAmean effective gaincorrelation coefficientdiversity antenna gain
 Summary | Full Text:PDF(965.8KB)

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
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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
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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
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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
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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
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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
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Investigations of Radiation Characteristics of a Circularly Polarized Conical Beam Spherical Slot Array Antenna
Chuwong PHONGCHAROENPANICH Monai KRAIRIKSH Jun-ichi TAKADA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1999/07/25
Vol. E82-C  No. 7  pp. 1242-1247
Type of Manuscript:  Special Section PAPER (Special Issue on Microwave and Millimeter Wave Technology)
Category: Phased Arrays and Antennas
Keyword: 
spherical slot array antennamobile satellite antennaconical beamcircular polarization
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On Applicability of the Integral Equation Formulation of the Measured Equation of Invariance to 2D Scattering Objects
Masanobu HIROSE Masayasu MIYAKE Jun-ichi TAKADA Ikuo ARAI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1999/04/25
Vol. E82-B  No. 4  pp. 645-654
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
IE-MEI2D scattererinternal resonancecircular cylindersquare cylinder
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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
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Aperture Illumination Control in Radial Line Slot Antennas
Masaharu TAKAHASHI Jun-ichi TAKADA Makoto ANDO Naohisa GOTO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1993/07/25
Vol. E76-B  No. 7  pp. 777-783
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
RLSAplanar antennaBSwave-guide arrayradial wave-guide
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An Equivalent Circuit of a Slot in Radial Line Slot Antennas
Jun-ichi TAKADA Makoto ANDO Naohisa GOTO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1991/09/25
Vol. E74-C  No. 9  pp. 2922-2928
Type of Manuscript:  Special Section PAPER (Special Issue on OFSET '90)
Category: Antenna
Keyword: 
 Summary | Full Text:PDF(450.3KB)

The Bandwidth and the Gain of Radial Line Slot Antennas with Uniform Slot Density
Jun-ichi TAKADA Makoto ANDO Naohisa GOTO 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1990/08/25
Vol. E73-E  No. 8  pp. 1372-1377
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
 Summary | Full Text:PDF(478KB)