Yoshio KARASAWA


Frequency-Domain Differential Coding Schemes under Frequency-Selective Fading Environment in Adaptive Baseband Radio
Jin NAKAZATO Daiki OKUYAMA Yuki MORIMOTO Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2016/02/01
Vol. E99-B  No. 2  pp. 488-498
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
baseband radiocognitive radiosoftware-defined radiofrequency-domain packet communicationDSFBCspectrum-spreading reverberation chamber
 Summary | Full Text:PDF(2.4MB)

Design of Two-Way Relay Network Using Space-Time Block Coded Network Coding with Relay Selection
Xuan Nam TRAN Van Bien PHAM Duc Hiep VU Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2015/08/01
Vol. E98-A  No. 8  pp. 1657-1666
Type of Manuscript:  Special Section PAPER (Special Section on Information and Communication Systems for Safe and Secure Life)
Category: 
Keyword: 
two-way relaynetwork codingrelay selectionMIMOSTBCMMSEad hoc network
 Summary | Full Text:PDF(1.2MB)

Simplified Multipath Propagation Measurement Scheme for DOA and Delay Based on Virtual Array Technique
Phavanhna PHOMMASACK Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2015/05/01
Vol. E98-B  No. 5  pp. 814-823
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Radio Propagation)
Category: 
Keyword: 
propagation measurementvirtual arrayDOAdelay
 Summary | Full Text:PDF(1.6MB)

Fundamental Propagation Characteristics of Stirrer-Less Reverberation Chamber for MIMO-OTA Measurements
Yoshio KARASAWA Ichiro OSHIMA Fatahuddin TAMRIN Yui SAKAMOTO Rizwan ARIF Katsumori SASAKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/10/01
Vol. E97-B  No. 10  pp. 2083-2092
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Measurement and Design Techniques on Antennas, Propagation and Wireless Systems)
Category: 
Keyword: 
MIMOOTAreverberation chamberradio-absorbing sheetdelay spreadfrequency dependence
 Summary | Full Text:PDF(2.7MB)

A New Scheme to Enhance Bandwidth of Printed Dipole for Wideband Applications
Dinh Thanh LE Nguyen Quoc DINH Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/04/01
Vol. E97-B  No. 4  pp. 773-782
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
printed antennasdipolemutual couplingultra-wideband antennasreconfigurable antennas
 Summary | Full Text:PDF(2.4MB)

Experimental Evaluation of the Propagation Environment Control Function in a Double-Layered Reverberation Chamber in a MIMO-OTA System
Ichiro OSHIMA Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2013/10/01
Vol. E96-B  No. 10  pp. 2389-2398
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2012)
Category: Radio Propagation
Keyword: 
MIMO-OTAreverberation chamberarrival wave distributionspace correlationcross-polarization power ratio
 Summary | Full Text:PDF(1.5MB)

A Novel High-Resolution Propagation Measurement Scheme for Indoor Terrestrial TV Signal Reception Based on Two-Dimensional Virtual Array Technique
Kazuo MOROKUMA Atsushi TAKEMOTO Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2013/04/01
Vol. E96-B  No. 4  pp. 986-993
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
indoor propagationmultipath propagationdirection findingMUSIC algorithmvirtual array
 Summary | Full Text:PDF(1.7MB)

Distributed Relay Selection for MIMO-SDM Cooperative Networks
Xuan Nam TRAN Vinh Hanh NGUYEN Thanh Tam BUI The Cuong DINH Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/04/01
Vol. E95-B  No. 4  pp. 1170-1179
Type of Manuscript:  Special Section PAPER (Special Section on Cognitive Radio and Heterogeneous Wireless Networks in Conjunction with Main Topics of CrownCom2011)
Category: 
Keyword: 
relay selectioncooperative communicationMIMOMMSElinear combining
 Summary | Full Text:PDF(627.1KB)

An Approximation Method for Evaluating SIMO-OFDM MRC System in Multipath Environment Where Delay Profile Exceeds the Guard Interval
Quoc-Anh VU Changarkame VANMANY Anmol BAJRACHARYA Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/01/01
Vol. E95-B  No. 1  pp. 77-86
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2010)
Category: Radio Systems
Keyword: 
OFDMSIMOadaptive arrayETP modelmaximal ratio combining
 Summary | Full Text:PDF(1.4MB)

A Simple Broadband Antenna for MIMO Applications in Cognitive Radio
Dinh Thanh LE Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/01/01
Vol. E95-B  No. 1  pp. 18-26
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2010)
Category: Antennas
Keyword: 
printed dipolebroadband antennamutual couplingantenna arrayMIMOcognitive radio
 Summary | Full Text:PDF(1.5MB)

Performance Analysis of Base Station Cooperation in Multiantenna Cellular System
Tetsuki TANIGUCHI Yoshio KARASAWA Nobuo NAKAJIMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2011/11/01
Vol. E94-A  No. 11  pp. 2254-2262
Type of Manuscript:  Special Section PAPER (Special Section on Smart Multimedia & Communication Systems)
Category: Communication Theory and Signals
Keyword: 
MIMOcellular systemcooperative communicationsbeamforming
 Summary | Full Text:PDF(1.2MB)

Wideband MIMO Compact Antennas with Tri-Polarizations
Dinh Thanh LE Masahiro SHINOZAWA Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2011/07/01
Vol. E94-B  No. 7  pp. 1982-1993
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
MIMO systemspolarizationantenna arraysindoor radio communication
 Summary | Full Text:PDF(2.4MB)

Propagation Channel Modeling in the Mixture of NLOS and LOS Environments for MIMO-MRC System and Its Application to ITS-IVC
Yi WANG Kenji ITO Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2011/05/01
Vol. E94-B  No. 5  pp. 1207-1214
Type of Manuscript:  Special Section PAPER (Special Section on Antenna and Propagation Technologies Contributing to Diversification of Wireless Technologies)
Category: MIMO Propagation
Keyword: 
propagation modelMIMO-MRC systemmixture of NLOS and LOS environmentsITSInter-Vehicle Communication (IVC)Signal-to-Noise-Ratio (SNR)
 Summary | Full Text:PDF(1.3MB)

Statistical Analysis of MIMO Keyhole Channels under Double Rayleigh and Double Nakagami-Rice Fadings
Tetsuki TANIGUCHI Yoshio KARASAWA Makoto TSURUTA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2011/05/01
Vol. E94-B  No. 5  pp. 1215-1224
Type of Manuscript:  Special Section PAPER (Special Section on Antenna and Propagation Technologies Contributing to Diversification of Wireless Technologies)
Category: MIMO Propagation
Keyword: 
MIMOdouble fadingRayleigh fadingNakagami-Rice fadingkeyholeeigenvalue
 Summary | Full Text:PDF(1.1MB)

Advanced MIMO STBC Adaptive Array with PSAM in Fast Fading Channel
Susumu SASAKI Supawan ANNANAB Tetsuki TANIGUCHI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/03/01
Vol. E93-B  No. 3  pp. 660-669
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
MIMOspace-time block codefast fadingDoppler spreadadaptive beam-formingadaptive algorithm
 Summary | Full Text:PDF(900KB)

Macro-Diversity Scheme for a Point-to-Multipoint Communication System by means of D-STBC Method in Fast Fading Environment
Subrata Kumar BISWAS Tetsuki TANIGUCHI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/06/01
Vol. E92-B  No. 6  pp. 2122-2130
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
train radio systemspace-time block coding (STBC)differential STBC (D-STBC)Doppler spread
 Summary | Full Text:PDF(962.4KB)

Experiment on Synchronous Timing Signal Detection from ISDB-T Terrestrial Digital TV Signal with Application to Autonomous Distributed ITS-IVC Network
Yoshio KARASAWA Taichi KUMAGAI Atsushi TAKEMOTO Takeo FUJII Kenji ITO Noriyoshi SUZUKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/01/01
Vol. E92-B  No. 1  pp. 296-305
Type of Manuscript:  PAPER
Category: Integrated Systems for Communications
Keyword: 
ITSinter-vehicle communication (IVC)ad-hoc networksynchronizationOFDMguard interval
 Summary | Full Text:PDF(1.3MB)

An ISI Suppressing Method for SIMO-OFDM System Utilizing the Characteristic of the ETP-OFDM Model
Quoc-Anh VU Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/01/01
Vol. E92-B  No. 1  pp. 268-276
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
OFDMSIMOadaptive arrayETP modelIntersymbol interference
 Summary | Full Text:PDF(567.6KB)

Analysis and Approximation of Statistical Distribution of Eigenvalues in i.i.d. MIMO Channels under Rayleigh Fading
Tetsuki TANIGUCHI Shen SHA Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/10/01
Vol. E91-A  No. 10  pp. 2808-2817
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Communication Theory
Keyword: 
MIMOeigenvalueWishart matrixgamma approximationspace diversitymaximal ratio combining
 Summary | Full Text:PDF(854.1KB)

OFDM Transmission Characteristics where the Delay Profile Exceeds the Guard Interval in Nakagami-Rice Fading Environment
Yoshio KARASAWA Changarkame VANMANY 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/10/01
Vol. E91-B  No. 10  pp. 3262-3271
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
OFDMmultipath fadingETP modelintersymbol interference (ISI)guard intervalNakagami-rice fading
 Summary | Full Text:PDF(929.9KB)

Asynchronous MIMO STBC Adaptive Array Transmission Scheme for Multiuser over Fast Fading Channel
Supawan ANNANAB Tomonori TOBITA Tetsuki TANIGUCHI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/08/01
Vol. E91-B  No. 8  pp. 2666-2673
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
MIMOspace-time codetransmit diversityfast fadingDoppler spreadAsynchronous transmissionco-channel interferencetapped delay linearray processing
 Summary | Full Text:PDF(520.6KB)

Performance Comparison of Detection Methods for Combined STBC and SM Systems
Xuan Nam TRAN Huan Cong HO Tadashi FUJINO Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/06/01
Vol. E91-B  No. 6  pp. 1734-1742
Type of Manuscript:  Special Section PAPER (Special Section on 2007 International Symposium on Antennas and Propagation)
Category: Smart Antennas & MIMO
Keyword: 
transmit diversityspatial division multiplexingSTBCalamouti scheme
 Summary | Full Text:PDF(410.7KB)

Broadband MIMO Communication Systems Using Spatio-Temporal Processing in Transmitter and Receiver Sides
Tetsuki TANIGUCHI Hoang Huy PHAM Nam Xuan TRAN Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/11/01
Vol. E90-A  No. 11  pp. 2431-2438
Type of Manuscript:  Special Section PAPER (Special Section on Wideband Systems)
Category: MIMO
Keyword: 
MIMOmaximum ratio combiningfrequency selective fadingspatio-temporal processingtapped delay line
 Summary | Full Text:PDF(976KB)

Subband Adaptive Array for MIMO-STBC CDMA System
Nordin Bin RAMLI Tetsuki TANIGUCHI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/10/01
Vol. E90-A  No. 10  pp. 2309-2317
Type of Manuscript:  PAPER
Category: Spread Spectrum Technologies and Applications
Keyword: 
space-time codingmultiple input multiple output (MIMO)code division multiple access (CDMA)adaptive beamformingsubband adaptive array (SBAA)cyclic prefixfrequency selective fading (FSF) channel
 Summary | Full Text:PDF(479.2KB)

MIMO STBC Adaptive Array for Fast Fading Channel
Supawan ANNANAB Tetsuki TANIGUCHI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/09/01
Vol. E90-B  No. 9  pp. 2321-2329
Type of Manuscript:  Special Section PAPER (Special Section on 2006 International Symposium on Antennas and Propagation)
Category: Smart Antennas
Keyword: 
MIMOspace time block codefast fadingDoppler spreadadaptive beamformingadaptive algorithm
 Summary | Full Text:PDF(523.7KB)

Simple Approximation of Largest Eigenvalue Distribution in MIMO Channels Under Nakagami-Rice Fading
Tetsuki TANIGUCHI Shen SHA Yoshio KARASAWA Makoto TSURUTA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/09/01
Vol. E90-A  No. 9  pp. 1862-1870
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: 
Keyword: 
MIMOeigenvalueWishart matrixNakagami-Rice fadingNakagami m fadingmaximum ratio combining
 Summary | Full Text:PDF(868KB)

Innovative Antennas and Propagation Studies for MIMO Systems
Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/09/01
Vol. E90-B  No. 9  pp. 2194-2202
Type of Manuscript:  INVITED PAPER (Special Section on 2006 International Symposium on Antennas and Propagation)
Category: 
Keyword: 
MIMOMIMO channel modelSVDmulti-keyholedual-polarization antennatriple-polarization antennaMIMO-OFDM
 Summary | Full Text:PDF(940.5KB)

On Statistical Distribution of Eigenvalues of Channel Correlation Matrix in MIMO Multi-Keyhole Environment
Makoto TSURUTA Tetsuki TANIGUCHI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/09/01
Vol. E90-B  No. 9  pp. 2352-2359
Type of Manuscript:  Special Section PAPER (Special Section on 2006 International Symposium on Antennas and Propagation)
Category: Propagation
Keyword: 
MIMO multi-keyhole modelMIMO repeater systemeigenvaluespace diversitychannel capacity
 Summary | Full Text:PDF(766.2KB)

Statistical Multipath Propagation Modeling for Broadband Wireless Systems
Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/03/01
Vol. E90-B  No. 3  pp. 468-484
Type of Manuscript:  INVITED SURVEY PAPER
Category: 
Keyword: 
broadband wirelessmultipath propagationpropagation modelUWB angular power profile
 Summary | Full Text:PDF(1.5MB)

Spatial-Temporal Adaptive MIMO Beamforming for Frequency-Selective Fading Channels
Huy Hoang PHAM Tetsuki TANIGUCHI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/03/01
Vol. E90-B  No. 3  pp. 578-585
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
smart antennafrequency-selective fadingmultipathMIMOmutiuser system
 Summary | Full Text:PDF(574.1KB)

Subband Adaptive Array for Space-Time Block Coding
Nordin Bin RAMLI Xuan Nam TRAN Tetsuki TANIGUCHI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/11/01
Vol. E89-A  No. 11  pp. 3103-3113
Type of Manuscript:  Special Section PAPER (Special Section on Wide Band Systems)
Category: 
Keyword: 
MIMOspace-time codingsubband adaptive arraycyclic-prefixfrequency selective fading channel
 Summary | Full Text:PDF(536.8KB)

Experiments on a MIMO System Having Dual Polarization Diversity Branches
Nirmal Kumar DAS Masahiro SHINOZAWA Norihisa MIYADAI Tetsuki TANIGUCHI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/09/01
Vol. E89-B  No. 9  pp. 2522-2529
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
MIMOpolarization diversityspace-time coadingMIMO eigenmode transmissionsingular value decomposition (SVD)
 Summary | Full Text:PDF(1.1MB)

Wireless Baseband Transmission Experiments
Jun-ichi KITAGAWA Tetsuki TANIGUCHI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/06/01
Vol. E89-B  No. 6  pp. 1815-1824
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
wireless baseband transmissionManchester encodingdiscone antennaultra wide band
 Summary | Full Text:PDF(738.6KB)

Design of MIMO Communication Systems Using Tapped Delay Line Structure in Receiver Side
Tetsuki TANIGUCHI Hoang Huy PHAM Nam Xuan TRAN Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/03/01
Vol. E89-A  No. 3  pp. 670-677
Type of Manuscript:  Special Section PAPER (Special Section on Multidimensional Signal Processing and Its Application)
Category: Communications
Keyword: 
MIMOSTBCmaximum ratio combiningfrequency selective fadingspatio-temporal processingtapped delay line
 Summary | Full Text:PDF(476KB)

Analysis of Scattering Problem by an Imperfection of Finite Extent in a Plane Surface
Masaji TOMITA Tomio SAKASHITA Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/12/01
Vol. E88-C  No. 12  pp. 2177-2191
Type of Manuscript:  Special Section PAPER (Special Section on Wireless Technologies and Computational Electromagnetics)
Category: EM Analysis
Keyword: 
scattering problemarbitrary imperfection of finite extentDirichlet problemcompleteness of L2(-∞, ∞)space
 Summary | Full Text:PDF(970.6KB)

Modeling and Analysis of OFDM Transmission Characteristics in Rayleigh Fading Environment in Which the Delay Profile Exceeds the Guard Interval
Yoshio KARASAWA Noriyuki GEJOH Takaaki IZUMI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/07/01
Vol. E88-B  No. 7  pp. 3020-3027
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
OFDMmultipath fadingETP modelintersymbol interferenceguard interval
 Summary | Full Text:PDF(338.4KB)

FOREWORD
Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/06/01
Vol. E88-B  No. 6  pp. 2229-2229
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(42.7KB)

MIMO Propagation Channel Modeling
Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/05/01
Vol. E88-B  No. 5  pp. 1829-1842
Type of Manuscript:  INVITED PAPER (Special Section on Recent Progress in Antennas and Propagation Researches--Selected Papers Translated from the IEICE Transactions on Communications (Japanese Edition)--)
Category: 
Keyword: 
MIMOsingular-value decompositionmultipath fadingeigenvalue distributionspatial correlationdiversitymaximum ratio combining
 Summary | Full Text:PDF(1.7MB)

FOREWORD
Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/05/01
Vol. E88-B  No. 5  pp. 1765-1765
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(48.3KB)

Spatio-Temporal Equalization for Space-Time Block Coded Transmission over Frequency Selective Fading Channel with Co-channel Interference
Xuan Nam TRAN Tetsuki TANIGUCHI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/03/01
Vol. E88-A  No. 3  pp. 660-668
Type of Manuscript:  Special Section PAPER (Special Section on Adaptive Signal Processing and Its Applications)
Category: 
Keyword: 
space-time codeMIMOtransmit diversityspatio-temporal equalizationarray processingco-channel interferencemultipath fading
 Summary | Full Text:PDF(1MB)

Multiuser MIMO Beamforming for Single Data Stream Transmission in Frequency-Selective Fading Channels
Huy Hoang PHAM Tetsuki TANIGUCHI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2005/03/01
Vol. E88-A  No. 3  pp. 651-659
Type of Manuscript:  Special Section PAPER (Special Section on Adaptive Signal Processing and Its Applications)
Category: 
Keyword: 
smart antennasfrequency-selective fadingmultipathMIMOmutiuser systems
 Summary | Full Text:PDF(916KB)

Adaptive Algorithm Based on Accumulated Signal Processing for Fast Fading Channels with Application to OFDM Mobile Radio
Pubudu Sampath WIJESENA Tetsuki TANIGUCHI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/02/01
Vol. E88-B  No. 2  pp. 568-574
Type of Manuscript:  Special Section PAPER (Special Section on Multi-carrier Signal Processing Techniques for Next Generation Mobile Communications--Part2)
Category: 
Keyword: 
MMSE adaptive arrayadaptive algorithmaccumulated signal processingOFDM
 Summary | Full Text:PDF(1.4MB)

An MMSE Multiuser Detector for Space-Time Block Coded OFDM
Xuan Nam TRAN Tadashi FUJINO Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/01/01
Vol. E88-B  No. 1  pp. 141-149
Type of Manuscript:  Special Section PAPER (Special Section on Multi-carrier Signal Processing Techniques for Next Generation Mobile Communications--Part 1)
Category: Interference Canceller
Keyword: 
space-time codetransmit diversityOFDMmultipath fadingmultiuser detection
 Summary | Full Text:PDF(824.3KB)

The Weights Determination Scheme for MIMO Beamforming in Frequency-Selective Fading Channels
Huy Hoang PHAM Tetsuki TANIGUCHI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2004/08/01
Vol. E87-B  No. 8  pp. 2243-2249
Type of Manuscript:  PAPER
Category: Wireless Communication Technology
Keyword: 
smart antennasfrequency-selective fadingmultipathMIMOwireless communication systems
 Summary | Full Text:PDF(287KB)

Beam-Space Adaptive Array Antenna for Suppressing the Doppler Spread in OFDM Mobile Reception
Pubudu Sampath WIJESENA Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2004/01/01
Vol. E87-B  No. 1  pp. 20-28
Type of Manuscript:  PAPER
Category: Wireless Communication Technology
Keyword: 
OFDMDoppler spreadinter carrier interferencebeam-space array antennamaximal ratio combining
 Summary | Full Text:PDF(927.1KB)

An Adaptive Array Antenna Based on the IQ-Division Bandpass Sampling
Shinya SASAKI Tetsuki TANIGUCHI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/12/01
Vol. E86-B  No. 12  pp. 3483-3490
Type of Manuscript:  Special Section PAPER (Special Issue on Software Defined Radio Technology and Its Applications)
Category: 
Keyword: 
IQ-divisionbandpass samplingadaptive array antennasoftware defined radio (SDR)
 Summary | Full Text:PDF(753.9KB)

A Multistage Blind Adaptive Array Antenna for Multiuser Signal Detection in Asynchronous SS Systems
Yukihiro KAMIYA Kenichi OCHIAI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/08/01
Vol. E86-B  No. 8  pp. 2414-2424
Type of Manuscript:  PAPER
Category: Wireless Communication Technology
Keyword: 
adaptive arraysCMAspread spectrummultiuser detectionsoftware defined radio (SDR)
 Summary | Full Text:PDF(890.2KB)

Subband Adaptive Array for Multirate Multicode DS-CDMA Systems
Xuan Nam TRAN Tetsuki TANIGUCHI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/07/01
Vol. E86-A  No. 7  pp. 1611-1618
Type of Manuscript:  Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks)
Category: 
Keyword: 
subband adaptive arraymulticode CDMAcyclic prefix spreading codemultipath fadingmobile communications
 Summary | Full Text:PDF(678.2KB)

Spatial Optical Signal Processing Beam Forming Network for 2-Dimensional Beam Steering
Keizo INAGAKI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2003/07/01
Vol. E86-C  No. 7  pp. 1209-1217
Type of Manuscript:  Special Section PAPER (Special Issue on Recent Progress in Microwave and Millimeter-wave Photonics Technologies)
Category: Photonics for Antenna Systems
Keyword: 
optical controlbeam forming network2-D beam steeringFourier transform lensgraded index fiber lensed single mode fiber
 Summary | Full Text:PDF(1.6MB)

A Simple Calculation Method on Spatial Distribution of Error Occurrence due to ISI Based on the ETP Model--Application to Indoor Propagation Environments
Noriyuki GEJOH Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/02/01
Vol. E86-B  No. 2  pp. 809-817
Type of Manuscript:  PAPER
Category: Antenna and Propagation
Keyword: 
ETP modelintersymbol interferencemultipath fadingindoor propagationBER map
 Summary | Full Text:PDF(591KB)

Theoretical Analysis of Subband Adaptive Array Combining Cyclic Prefix Data Transmission Scheme
Xuan Nam TRAN Tetsuki TANIGUCHI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/12/01
Vol. E85-B  No. 12  pp. 2610-2621
Type of Manuscript:  Special Section PAPER (Special Issue on Software Defined Radio Technology and Its Applications)
Category: 
Keyword: 
software antennasubband adaptive arraycyclic prefixmultipath fadingmobile communication
 Summary | Full Text:PDF(729.8KB)

Performance Analysis of Subband Adaptive Array in Multipath Fading Environment
Xuan Nam TRAN Tetsuki TANIGUCHI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2002/08/01
Vol. E85-A  No. 8  pp. 1798-1806
Type of Manuscript:  Special Section PAPER (Special Section on Digital Signal Processing)
Category: Adaptive Signal Processing
Keyword: 
subband processingadaptive arrayspace-time processingmultipath fadingmobile communication
 Summary | Full Text:PDF(432.6KB)

Performance Analysis of Subband Arrays
Yimin ZHANG Kehu YANG Moeness G. AMIN Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/09/01
Vol. E84-B  No. 9  pp. 2507-2515
Type of Manuscript:  Special Section PAPER (Special Issue on Innovation in Antennas and Propagation for Expanding Radio Systems)
Category: Adaptive Antennas
Keyword: 
subband arrayspace-time adaptive processingadaptive arraymultirate signal processingmobile communication
 Summary | Full Text:PDF(1MB)

Theoretical Analysis on the Performance of Optimal Combining for Multipath Waves Distributed in Spatial and Time Domains
Takashi INOUE Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2000/07/25
Vol. E83-B  No. 7  pp. 1426-1434
Type of Manuscript:  PAPER
Category: Wireless Communication Technology
Keyword: 
wideband signalsfading depthRayleigh fadingeigenvalue decompositionmaximal ratio combining
 Summary | Full Text:PDF(589.8KB)

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)

Algorithm Diversity in a Software Antenna
Yoshio KARASAWA Yukihiro KAMIYA Takashi INOUE Satoshi DENNO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2000/06/25
Vol. E83-B  No. 6  pp. 1229-1236
Type of Manuscript:  Special Section PAPER (Special Issue on Software Defined Radio and Its Technologies)
Category: 
Keyword: 
software antennaalgorithm diversityreconfigurable antennaadaptive antenna
 Summary | Full Text:PDF(1.2MB)

A Software Antenna: Reconfigurable Adaptive Arrays Based on Eigenvalue Decomposition
Yukihiro KAMIYA Yoshio KARASAWA Satoshi DENNO Yoshihiko MIZUGUCHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1999/12/25
Vol. E82-B  No. 12  pp. 2012-2020
Type of Manuscript:  Special Section PAPER (Special Issue on Multimedia Mobile Communication Systems)
Category: 
Keyword: 
software antennaDBFFPGADSPmultipath fading
 Summary | Full Text:PDF(577.1KB)

CMA Adaptive Array Antennas Using Analysis and Synthesis Filter Banks
Takashi SEKIGUCHI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/08/25
Vol. E81-A  No. 8  pp. 1570-1577
Type of Manuscript:  Special Section PAPER (Special Section on Digital Signal Processing)
Category: 
Keyword: 
adaptive arraysadaptive signal processingfilter banksarray processingdigital beamformingoptical signal processing antennas
 Summary | Full Text:PDF(597KB)

Two-Dimensional RAKE Reception Scheme for DS/CDMA Systems in Beam Space Digital Beam Forming Antenna Configuration
Takashi INOUE Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/07/25
Vol. E81-B  No. 7  pp. 1374-1383
Type of Manuscript:  Special Section PAPER (Special Issue on Third Generation Land Mobile Communication Systems)
Category: 
Keyword: 
DS/CDMARAKE reception2D-RAKEanti-fading techniquewideband propagation channel model
 Summary | Full Text:PDF(687.4KB)

ISI and CCI Canceller with Preselecting Adaptive Array and Cascaded Equalizer in Digital Mobile Radio
Yoshiharu DOI Takeo OHGANE Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/03/25
Vol. E81-B  No. 3  pp. 674-682
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
adaptive array antennamaximum-likelihood sequence estimationinter-symbol interference cancellingco-channel interference cancellingdiversity branch preselection
 Summary | Full Text:PDF(801.6KB)

Interference Cancellation Characteristics of a BSCMA Adaptive Array Antenna with a DBF Configuration
Toyohisa TANAKA Ryu MIURA Isamu CHIBA Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1997/09/25
Vol. E80-B  No. 9  pp. 1363-1371
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
adaptive array antennainterference cancellationCMAconvergencesymbol delaycapturetrackingDoppler effect
 Summary | Full Text:PDF(776.3KB)

The Software Antenna: A New Concept of Kaleidoscopic Antenna in Multimedia Radio and Mobile Computing Era
Yoshio KARASAWA Takashi SEKIGUCHI Takashi INOUE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1997/08/25
Vol. E80-B  No. 8  pp. 1214-1217
Type of Manuscript:  Special Section LETTER (Special Issue on Mobile Computing)
Category: 
Keyword: 
mobile radiosoftware antennareconfigurable FPGAalgorithm diversity
 Summary | Full Text:PDF(332.1KB)

Beam Forming Characteristics of a Waveguide-Type Optical Phased Array Antenna
Yasushi MURAKAMI Keizo INAGAKI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1997/04/25
Vol. E80-B  No. 4  pp. 617-624
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
antennas and propagationoptical antennaphased arraybeam formingoptical waveguide
 Summary | Full Text:PDF(654.9KB)

Implementation of a Digital Signal Processor in a DBF Self-Beam-Steering Array Antenna
Toyohisa TANAKA Ryu MIURA Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1997/01/25
Vol. E80-B  No. 1  pp. 166-175
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
DBF antennaself-beam-steeringself-phasingmaximal ratio combiningDSPFPGAASIC
 Summary | Full Text:PDF(901.5KB)

Double-Layered Inclined Orbit Constellation for Advanced Satellite Communications Network
Kazuhiro KIMURA Keizo INAGAKI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1997/01/25
Vol. E80-B  No. 1  pp. 93-102
Type of Manuscript:  Special Section PAPER (Special Issue on Advances in Satellite Communications toward Multimedia Era)
Category: System Technology
Keyword: 
low earth orbitsatellite communicationsglobal networkoptical inter-satellite linkdouble-layered constellation
 Summary | Full Text:PDF(767.8KB)

Analysis of Cycle Slip in Clock Recovery on Frequency-Selective Nakagami-Rice Fading Channels Based on the Equivalent Transmission-Path Model
Yoshio KARASAWA Tomonori KURODA Hisato IWAI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1996/12/25
Vol. E79-B  No. 12  pp. 1900-1910
Type of Manuscript:  PAPER
Category: Radio Communication
Keyword: 
frequency-selective fadingNakagami-Rice fadingcycle slipclock recoveryequivalent transmission-path model
 Summary | Full Text:PDF(811KB)

The Theoretical Foundation and Applications of Equivalent Transmission-Path Model for Assessing Wideband Digital Transmission Characteristics in Nakagami-Rice Fading Environments
Hisato IWAI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1996/09/25
Vol. E79-B  No. 9  pp. 1205-1214
Type of Manuscript:  Special Section PAPER (Special Issue on Personal Communications)
Category: Radio propagation and channel modeling
Keyword: 
mobile propagation environmentswideband digital transmission characteristicsNakagami-Rice fadingBER characteristicsintersymbol interference
 Summary | Full Text:PDF(788.8KB)

Characteristics in Neodymium-Doped Fiber Amplifiers at 1.06 µm
Tetsuya MIYAZAKI Yoshio KARASAWA Minoru YOSHIDA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1996/06/25
Vol. E79-C  No. 6  pp. 863-869
Type of Manuscript:  PAPER
Category: Opto-Electronics
Keyword: 
Nd-doped fiber amplifier1.06µmNd-Al co-doped fibersNd: YAGlaser
 Summary | Full Text:PDF(554KB)

Frequency Characteristics of a Beamforming Network of an Optically Controlled Array Antenna and Its Radiation Pattern Measurements
Kenichi YAMADA Isamu CHIBA Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1996/01/25
Vol. E79-C  No. 1  pp. 68-73
Type of Manuscript:  Special Section PAPER (Special Issue on Optomicrowave Techniques and Their Applications)
Category: Optically Controlled Beam Forming Networks
Keyword: 
optically controlled array antennatwo-laser typefiber arrayFourier transform
 Summary | Full Text:PDF(474.2KB)

An ASIC Implementation Scheme to Realize a Beam Space CMA Adaptive Array Antenna
Toyohisa TANAKA Ryu MIURA Isamu CHIBA Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1995/11/25
Vol. E78-B  No. 11  pp. 1467-1473
Type of Manuscript:  Special Section PAPER (Special Issue on Adaptive Signal Processing Technology in Antennas)
Category: 
Keyword: 
adaptive antennaDBF antennaCMADSPASIC
 Summary | Full Text:PDF(583.7KB)

A Slot Coupled Microstrip Antenna with a Multi-Layer Thick Ground Plane
Kazunori TAKEUCHI Isamu CHIBA Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1995/08/25
Vol. E78-C  No. 8  pp. 988-994
Type of Manuscript:  Special Section PAPER (Special Issue on Microwave and Millimeter-Wave Technology)
Category: 
Keyword: 
slot-coupled microstrip antennaMMICactive array antenna
 Summary | Full Text:PDF(633.2KB)

Wideband Propagation Model for the Analysis of the Effect of the Multipath Fading on the Near-Far Problem in CDMA Mobile Radio Systems
Hisato IWAI Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1993/02/25
Vol. E76-B  No. 2  pp. 103-112
Type of Manuscript:  Special Section PAPER (Special Issue on Land Mobile/Portable Propagation)
Category: 
Keyword: 
propagation modelCDMAmobile radiosimulation method
 Summary | Full Text:PDF(793.9KB)

Interference Evaluation Method for Mobile-Satellite Systems under Nakagami-Rice Fading Conditions
Yoshio KARASAWA Masayuki YASUNAGA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1992/01/25
Vol. E75-B  No. 1  pp. 42-49
Type of Manuscript:  PAPER
Category: Radio Communication
Keyword: 
interferenceNakagami-Rice fadingc/n prediction
 Summary | Full Text:PDF(644.7KB)

A Fading Reduction Technique Using Interleave-Aided Open Loop Space Diversity for Digital Maritime-Satellite Communications
Hisato IWAI Masayuki YASUNAGA Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1991/10/25
Vol. E74-B  No. 10  pp. 3286-3294
Type of Manuscript:  Special Section PAPER (Special Issue on Mobile Communication Antennas)
Category: 
Keyword: 
 Summary | Full Text:PDF(748.1KB)

Interpretation of Quasi-Perriodic Scintillation at Frequencies above 1 GHz
Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1987/08/25
Vol. E70-E  No. 8  pp. 768-774
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
 Summary | Full Text:PDF(531.3KB)

Characteristics of L-Band Multipath Fading due to Sea Surface Reflection in Aeronautical Satellite Communications
Masayuki YASUNAGA Yoshio KARASAWA Takayasu SHIOKAWA Matsuichi YAMADA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1986/10/25
Vol. E69-E  No. 10  pp. 1060-1063
Type of Manuscript:  LETTER
Category: Antenna and Propagation
Keyword: 
 Summary | Full Text:PDF(237.4KB)

On-board Experiments on L-band Multipath Fading and Its Reduction by Use of the Polarization Shaping Method
Yoshio KARASAWA Masayuki YASUNAGA Shinichi NOMOTO Takayasu SHIOKAWA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1986/02/25
Vol. E69-E  No. 2  pp. 124-131
Type of Manuscript:  PAPER
Category: Radio Wave and Satellite Communication
Keyword: 
 Summary | Full Text:PDF(644.5KB)

A Simplified Fading Reduction Technique in Maritime Satellite Communications
Masayuki YASUNAGA Yoshio KARASAWA Takayasu SHIOKAWA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1986/02/25
Vol. E69-E  No. 2  pp. 83-85
Type of Manuscript:  LETTER
Category: Antenna and Propagation
Keyword: 
 Summary | Full Text:PDF(167.2KB)

Consideration on Increasing Power Gain of Axial-Mode Helical Antenna
Takayasu SHIOKAWA Yoshio KARASAWA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1981/11/25
Vol. E64-E  No. 11  pp. 742-743
Type of Manuscript:  LETTER
Category: Antenna and Propagation
Keyword: 
 Summary | Full Text:PDF(141.6KB)

Gradual Change of Power Spectrum of Ionospheric Scintillation
Yoshio KARASAWA Koji YASUKAWA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1981/09/25
Vol. E64-E  No. 9  pp. 606-607
Type of Manuscript:  LETTER
Category: Antenna and Propagation
Keyword: 
 Summary | Full Text:PDF(128.9KB)