Takeo OHGANE


Node Selection for Belief Propagation Based Channel Equalization
Mitsuyoshi HAGIWARA Toshihiko NISHIMURA Takeo OHGANE Yasutaka OGAWA 
Publication:   
Publication Date: 2017/08/01
Vol. E100-B  No. 8  pp. 1285-1292
Type of Manuscript:  Special Section PAPER (Special Section on Radio Access Technologies for 5G Mobile Communications System)
Category: Wireless Communication Technologies
Keyword: 
belief propagation algorithmlog-likelihood ratiointerference cancellerequalization
 Summary | Full Text:PDF(1.3MB)

Serial and Parallel LLR Updates Using Damped LLR for LDPC Coded Massive MIMO Detection with Belief Propagation
Shuhei TANNO Toshihiko NISHIMURA Takeo OHGANE Yasutaka OGAWA 
Publication:   
Publication Date: 2017/08/01
Vol. E100-B  No. 8  pp. 1277-1284
Type of Manuscript:  Special Section PAPER (Special Section on Radio Access Technologies for 5G Mobile Communications System)
Category: Wireless Communication Technologies
Keyword: 
massive MIMObelief propagationLDPC codefactor graphbipartite graphtripartite graph
 Summary | Full Text:PDF(1.3MB)

A Throughput Evaluation of an Over-Distributed Antenna System with Limited Pilot Resources
Yuki NAKANISHI Toshihiko NISHIMURA Takeo OHGANE Yasutaka OGAWA Yusuke OHWATARI Yoshihisa KISHIYAMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2015/08/01
Vol. E98-B  No. 8  pp. 1465-1473
Type of Manuscript:  Special Section PAPER (Special Section on 5G Radio Access Networks―Part I: Radio Access Technologies and System Design)
Category: 
Keyword: 
distributed antenna systemmultiuser MIMO systemthroughputpilot resource
 Summary | Full Text:PDF(1.9MB)

Channel Prediction Techniques for a Multi-User MIMO System in Time-Varying Environments
Kanako YAMAGUCHI Huu Phu BUI Yasutaka OGAWA Toshihiko NISHIMURA Takeo OHGANE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/12/01
Vol. E97-B  No. 12  pp. 2747-2755
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
channel predictionmulti-user MIMO systemblock diagonalizationeigenbeam-space division multiplexingtime-varying environmentsAR modellagrange extrapolation
 Summary | Full Text:PDF(2.1MB)

DOA Estimation for Multi-Band Signal Sources Using Compressed Sensing Techniques with Khatri-Rao Processing
Tsubasa TERADA Toshihiko NISHIMURA Yasutaka OGAWA Takeo OHGANE Hiroyoshi YAMADA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/10/01
Vol. E97-B  No. 10  pp. 2110-2117
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Measurement and Design Techniques on Antennas, Propagation and Wireless Systems)
Category: 
Keyword: 
DOA estimationmulti-band signalcompressed sensingKhatri-Rao productsparse signal reconstruction
 Summary | Full Text:PDF(1.7MB)

Behavior of a Multi-User MIMO System in Time-Varying Environments
Yasutaka OGAWA Kanako YAMAGUCHI Huu Phu BUI Toshihiko NISHIMURA Takeo OHGANE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2013/10/01
Vol. E96-B  No. 10  pp. 2364-2371
Type of Manuscript:  INVITED PAPER (Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2012)
Category: 
Keyword: 
multi-user MIMO systemchannel state informationtime-varying environmentchannel predictionautoregressive (AR) model-based prediction
 Summary | Full Text:PDF(1.6MB)

Impact on Inter-Cell Interference of Reference Signal for Interference Rejection Combining Receiver in LTE-Advanced Downlink
Yousuke SANO Yusuke OHWATARI Nobuhiko MIKI Yuta SAGAE Yukihiko OKUMURA Yasutaka OGAWA Takeo OHGANE Toshihiko NISHIMURA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/12/01
Vol. E95-B  No. 12  pp. 3728-3738
Type of Manuscript:  Special Section PAPER (Special Section on Coding and Coding Theory-Based Signal Processing for Wireless Communications)
Category: 
Keyword: 
LTE-Advancedinterference rejection combininginter-cell interferencereference signalturbo equalizer
 Summary | Full Text:PDF(3MB)

Time-Reversal MUSIC Imaging with Time-Domain Gating Technique
Heedong CHOI Yasutaka OGAWA Toshihiko NISHIMURA Takeo OHGANE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/07/01
Vol. E95-B  No. 7  pp. 2377-2385
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
time-reversal (TR) techniqueTR-MUSIC imagingultra wideband (UWB)gating technique
 Summary | Full Text:PDF(3.7MB)

IEICE Transactions on Communications: Editor's Message
Takeo OHGANE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/06/01
Vol. E95-B  No. 6  pp. 1982-1982
Type of Manuscript:  MESSAGE
Category: 
Keyword: 
 Summary | Full Text:PDF(102.7KB)

Performance Evaluation of MIMO-UWB Systems Using Measured Propagation Data and Proposal of Timing Control Scheme in LOS Environments
Masaki TAKANASHI Toshihiko NISHIMURA Yasutaka OGAWA Takeo OHGANE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/08/01
Vol. E92-B  No. 8  pp. 2698-2707
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
MIMO-UWBLOS (line-of-sight) environmentfrequency-domain equalizationtransmit and receive timing control
 Summary | Full Text:PDF(909.6KB)

Performance Evaluation of Multiuser MIMO E-SDM Systems in Time-Varying Fading Environments
Huu Phu BUI Yasutaka OGAWA Toshihiko NISHIMURA Takeo OHGANE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/07/01
Vol. E92-B  No. 7  pp. 2374-2388
Type of Manuscript:  PAPER
Category: Fundamental Theories for Communications
Keyword: 
multiuser MIMO systemseigenbeam-space division multiplexing E-SDMchannel extrapolationtime-varying fading environments
 Summary | Full Text:PDF(1.3MB)

Subblock Processing for Frequency-Domain Turbo Equalization under Fast Fading Environments
Keiichi KAMBARA Hiroshi NISHIMOTO Toshihiko NISHIMURA Takeo OHGANE Yasutaka OGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/05/01
Vol. E92-B  No. 5  pp. 1466-1474
Type of Manuscript:  Special Section PAPER (Special Section on Radio Access Techniques for 3G Evolution)
Category: 
Keyword: 
fast fadingsingle carrier transmissionSC/MMSE-FDTEunique wordsubblock processing
 Summary | Full Text:PDF(716.1KB)

Precise DOA Estimation Using SAGE Algorithm with a Cylindrical Array
Masaki TAKANASHI Toshihiko NISHIMURA Yasutaka OGAWA Takeo OHGANE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/11/01
Vol. E91-B  No. 11  pp. 3784-3787
Type of Manuscript:  LETTER
Category: Antennas and Propagation
Keyword: 
DOA estimationcylindrical arraycoherent signalsSAGE algorithm
 Summary | Full Text:PDF(331.4KB)

Soft Decision Directed Channel Estimation with Interference Cancellation for a MIMO System Using Iterative Equalization and Decoding
Masatsugu HIGASHINAKA Hiroshi KUBO Akihiro OKAZAKI Yasutaka OGAWA Takeo OHGANE Toshihiko NISHIMURA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/10/01
Vol. E91-A  No. 10  pp. 2787-2797
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Communication Theory
Keyword: 
MIMOfrequency domain equalizationiterative equalizationchannel estimationinterference cancellation
 Summary | Full Text:PDF(919.9KB)

Performance of MIMO E-SDM Systems Using Channel Prediction in Actual Time-Varying Indoor Fading Environments
Huu Phu BUI Hiroshi NISHIMOTO Toshihiko NISHIMURA Takeo OHGANE Yasutaka OGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/06/01
Vol. E91-B  No. 6  pp. 1713-1723
Type of Manuscript:  Special Section PAPER (Special Section on 2007 International Symposium on Antennas and Propagation)
Category: Smart Antennas & MIMO
Keyword: 
MIMO systemseigenbeam-space division multiplexing (E-SDM)transmit beamformingchannel predictiontime-varying fading environments
 Summary | Full Text:PDF(946KB)

Measurement-Based Performance Evaluation of Coded MIMO-OFDM Spatial Multiplexing with MMSE Spatial Filtering in an Indoor Line-of-Sight Environment
Hiroshi NISHIMOTO Toshihiko NISHIMURA Takeo OHGANE Yasutaka OGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/05/01
Vol. E91-B  No. 5  pp. 1648-1652
Type of Manuscript:  LETTER
Category: Wireless Communication Technologies
Keyword: 
MIMOOFDMspatial multiplexingMMSE spatial filteringindoor channel measurementline-of-sight environmentsspace-frequency diversity
 Summary | Full Text:PDF(334.8KB)

Studies on an Iterative Frequency Domain Channel Estimation Technique for MIMO-UWB Communications
Masaki TAKANASHI Yasutaka OGAWA Toshihiko NISHIMURA Takeo OHGANE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/04/01
Vol. E91-B  No. 4  pp. 1084-1094
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
MIMO-UWBMMSE-FDEleast square channel estimationiterative frequency domain channel estimation
 Summary | Full Text:PDF(631.2KB)

Arrangement of Scattering Points in Jakes' Model for i.i.d. Time-Varying MIMO Fading
Hiroshi NISHIMOTO Toshihiko NISHIMURA Takeo OHGANE Yasutaka OGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/11/01
Vol. E90-B  No. 11  pp. 3311-3314
Type of Manuscript:  LETTER
Category: Antennas and Propagation
Keyword: 
MIMOtime-varying Rayleigh fadingJakes' modelscattering points
 Summary | Full Text:PDF(214.3KB)

Pseudo Eigenbeam-Space Division Multiplexing (PE-SDM) in Frequency-Selective MIMO Channels
Hiroshi NISHIMOTO Toshihiko NISHIMURA Takeo OHGANE Yasutaka OGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/11/01
Vol. E90-B  No. 11  pp. 3197-3207
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
MIMO systemfrequency-selective fadingtransmit beamformingeffective channelfrequency continuitysingular value decomposition (SVD)pseudo eigenvectorpseudo eigenbeam-space division multiplexing (PE-SDM)channel estimation
 Summary | Full Text:PDF(665.9KB)

MIMO E-SDM Transmission Performance in an Actual Indoor Environment
Hiroshi NISHIMOTO Yasutaka OGAWA Toshihiko NISHIMURA Takeo OHGANE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/06/01
Vol. E90-B  No. 6  pp. 1474-1486
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
MIMOeigenbeam space division multiplexingarray element patterneigenvalue distributionchannel capacitybit error rate
 Summary | Full Text:PDF(1.8MB)

Channel Extrapolation Techniques for E-SDM System in Time-Varying Fading Environments
Huu Phu BUI Yasutaka OGAWA Takeo OHGANE Toshihiko NISHIMURA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/11/01
Vol. E89-B  No. 11  pp. 3083-3092
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
multiple-input multiple-output (MIMO) systemeigenbeam space division multiplexing (E-SDM)time-varying fading environmentmaximum Doppler frequency estimationchannel extrapolation
 Summary | Full Text:PDF(798.6KB)

Direction-of-Arrival Estimation of Coherent Signals Using a Cylindrical Array
Masaki TAKANASHI Toshihiko NISHIMURA Yasutaka OGAWA Takeo OHGANE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/06/01
Vol. E88-B  No. 6  pp. 2588-2596
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
circular arraycylindrical arrayUCA-Root MUSICsuperresolution techniquecoherent signals
 Summary | Full Text:PDF(1.5MB)

Applications of Space Division Multiplexing and Those Performance in a MIMO Channel
Takeo OHGANE Toshihiko NISHIMURA Yasutaka OGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/05/01
Vol. E88-B  No. 5  pp. 1843-1851
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: 
MIMOspatial multiplexingBLAST
 Summary | Full Text:PDF(890.6KB)

Channel Estimation and Signal Detection for Space Division Multiplexing in a MIMO-OFDM System
Yasutaka OGAWA Keisuke NISHIO Toshihiko NISHIMURA Takeo OHGANE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/01/01
Vol. E88-B  No. 1  pp. 10-18
Type of Manuscript:  Special Section PAPER (Special Section on Multi-carrier Signal Processing Techniques for Next Generation Mobile Communications--Part 1)
Category: MIMO
Keyword: 
orthogonal frequency division multiplexing (OFDM)multiple-input multiple-output (MIMO)space division multiplexing (SDM)channel estimationcondition numberordered successive detection
 Summary | Full Text:PDF(964.5KB)

Development and Evaluation of a Smart Antenna Test Bed for Wireless LAN
Yoshiharu DOI Seigo NAKAO Yasuhiro TANAKA Takeo OHGANE Yasutaka OGAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2004/09/01
Vol. E87-C  No. 9  pp. 1449-1454
Type of Manuscript:  Special Section PAPER (Special Section on Wave Technologies for Wireless and Optical Communications)
Category: Antennas and Propagation for Wireless Communications
Keyword: 
smart antennawireless LANsoftware defined radiofield test
 Summary | Full Text:PDF(778.1KB)

Development and Evaluation of the SDMA Test Bed for PHS in the Field
Yoshiharu DOI Jun KITAKADO Tadayoshi ITO Takeo MIYATA Seigo NAKAO Takeo OHGANE Yasutaka OGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/12/01
Vol. E86-B  No. 12  pp. 3433-3440
Type of Manuscript:  Special Section PAPER (Special Issue on Software Defined Radio Technology and Its Applications)
Category: 
Keyword: 
space division multiple accessadaptive array antennasoftware defined radio (SDR)field testPHS
 Summary | Full Text:PDF(789.9KB)

A Study on an Antenna Selection Scheme for Space-Time Turbo Code for OFDM Systems
Masayuki HOSHINO Mitsuru UESUGI Takeo OHGANE Yasutaka OGAWA Toshihiko NISHIMURA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/12/01
Vol. E86-B  No. 12  pp. 3476-3482
Type of Manuscript:  Special Section PAPER (Special Issue on Software Defined Radio Technology and Its Applications)
Category: 
Keyword: 
Space-Time codeantenna selectionTurbo code
 Summary | Full Text:PDF(798.3KB)

Signal Space Whitening MLSE with a Multibeam Adaptive Array
Akihito HANAKI Takeo OHGANE Yasutaka OGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/09/01
Vol. E86-B  No. 9  pp. 2592-2599
Type of Manuscript:  PAPER
Category: Wireless Communication Technology
Keyword: 
adaptive arrayinterference suppressionmaximum likelihood sequence estimationspatial-temporal equalization
 Summary | Full Text:PDF(770.7KB)

Advances in Adaptive Antenna Technologies in Japan
Yasutaka OGAWA Takeo OHGANE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/07/01
Vol. E84-B  No. 7  pp. 1704-1712
Type of Manuscript:  INVITED PAPER (Special Issue on Adaptive Array Antenna Techniques for Advanced Wireless Communications)
Category: 
Keyword: 
adaptive antennamobile communicationMMSE criterionCDMASDMA
 Summary | Full Text:PDF(4.3MB)

A Spatial Domain Interference Canceller Using a Multistage Adaptive Array with Precise Timing Estimation
Toshihiko NISHIMURA Yasuhiko TANABE Takeo OHGANE Yasutaka OGAWA Yoshiharu DOI Jun KITAKADO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/07/01
Vol. E84-B  No. 7  pp. 1735-1742
Type of Manuscript:  Special Section PAPER (Special Issue on Adaptive Array Antenna Techniques for Advanced Wireless Communications)
Category: Adaptive Algorithms and Experiments
Keyword: 
SDMAmultistage interference cancelleradaptive arrayFERPHS
 Summary | Full Text:PDF(1.4MB)

Space Domain Multistage Interference Canceller for SDMA
Toshihiko NISHIMURA Takeo OHGANE Yasutaka OGAWA Yoshiharu DOI Jun KITAKADO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/03/01
Vol. E84-B  No. 3  pp. 377-382
Type of Manuscript:  Special Section PAPER (Special Issue on Innovative Mobile Communication Technologies at the Dawn of the 21st Century)
Category: 
Keyword: 
SDMAmultistage interference cancelleradaptive arrayFERPHS
 Summary | Full Text:PDF(626.2KB)

Combining Techniques for Spatial-Domain Path-Diversity Using an Adaptive Array
Kenzaburoh FUJISHIMA Yasuhiko TANABE Toshihiko NISHIMURA Yasutaka OGAWA Takeo OHGANE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2000/12/25
Vol. E83-B  No. 12  pp. 2593-2599
Type of Manuscript:  PAPER
Category: Wireless Communication Technology
Keyword: 
adaptive antennapath-diversitymobile communicationsmultipath propagationmaximal ratio combining
 Summary | Full Text:PDF(394.4KB)

A Spatial-Domain RAKE Receiver Using a Super-Resolution Technique
Yasuhiko TANABE Kenzaburoh FUJISHIMA Yasutaka OGAWA Takeo OHGANE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2000/08/25
Vol. E83-B  No. 8  pp. 1664-1670
Type of Manuscript:  Special Section PAPER (Special Issue on Personal, Indoor and Mobile Radio Communications)
Category: 
Keyword: 
adaptive antennaspatial-domain path-diversityMUSIC algorithm
 Summary | Full Text:PDF(556.3KB)

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)

Adaptive Antennas for Future Mobile Radio
Yasutaka OGAWA Takeo OHGANE 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1996/07/25
Vol. E79-A  No. 7  pp. 961-967
Type of Manuscript:  INVITED PAPER (Special Section on Multi-dimensional Mobile Informatin Network)
Category: 
Keyword: 
adaptive antennamobile communicationmultipath propagationcochannel interferenceefficient spectrum utilization
 Summary | Full Text:PDF(597.5KB)

Spectral Efficiency Improvement by Base Station Antenna Pattern Control for Land Mobile Cellular Systems
Takeo OHGANE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1994/05/25
Vol. E77-B  No. 5  pp. 598-605
Type of Manuscript:  Special Section PAPER (Special Issue on Adaptive Signal Processing in Mobile Radio Communications)
Category: 
Keyword: 
co-channel interferencecellular systemadaptive arrayspectral efficiency
 Summary | Full Text:PDF(608.5KB)