Masao NAKAGAWA


FOREWORD
Masao NAKAGAWA 
Publication:   
Publication Date: 2017/06/01
Vol. E100-B  No. 6  pp. 910-910
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(259.5KB)

PAPR Reduction of TDD-CDMA Using Joint Transmission Technique
Norharyati BINTI HARUM Tomoaki OHTSUKI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/03/01
Vol. E95-B  No. 3  pp. 933-942
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
TD-SCDMATDDjoint transmissionprecodingPAPR
 Summary | Full Text:PDF(1.1MB)

Phase Rotation for Constructing Uniform Frequency Spectrum in IFDMA Communication
Takeo YAMASAKI Osamu TAKYU Koichi ADACHI Yohtaro UMEDA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/12/01
Vol. E93-A  No. 12  pp. 2672-2681
Type of Manuscript:  Special Section PAPER (Special Section on Wideband Systems)
Category: 
Keyword: 
SC-FDMAIFDMAdecision directed channel estimation (DDCE)phase rotation
 Summary | Full Text:PDF(1.1MB)

6-Axis Sensor Assisted Low Complexity High Accuracy-Visible Light Communication Based Indoor Positioning System
Chinnapat SERTTHIN Tomoaki OHTSUKI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/11/01
Vol. E93-B  No. 11  pp. 2879-2891
Type of Manuscript:  Special Section PAPER (Special Section on Fundamental Issues on Deployment of Ubiquitous Sensor Networks)
Category: 
Keyword: 
visible light communication (VLC)visible light communication identification (VLID)field-of-view (FOV)6-axis sensorroot means square of error distance (RMSED)switching estimated receiver position (SwERP)
 Summary | Full Text:PDF(3.5MB)

Multi-Band Received Signal Strength Fingerprinting Based Indoor Location System
Chinnapat SERTTHIN Takeo FUJII Tomoaki OHTSUKI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/08/01
Vol. E93-B  No. 8  pp. 1993-2003
Type of Manuscript:  Special Section PAPER (Special Section on Implementation, Experiments, and Practice for Ad Hoc and Mesh Networks)
Category: 
Keyword: 
fingerprintingmulti-band signalfrequency diversityindoor positioning systemreceived signal strength (RSS)multi-frequency band (multi-band) capability terminal
 Summary | Full Text:PDF(2.7MB)

Frequency Rotation for Suppressing Multipath Interference and Achieving Large Frequency Diversity in Uplink IFDMA
Osamu TAKYU Yohtaro UMEDA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/05/01
Vol. E93-B  No. 5  pp. 1284-1288
Type of Manuscript:  LETTER
Category: Wireless Communication Technologies
Keyword: 
IFDMAfrequency rotationsuppressingmultipath interference
 Summary | Full Text:PDF(469.5KB)

On the Construction of Orthogonal Spreading Code Groups for MC-CDMA with FDE in a Frequency Selective Channel
Koichi ADACHI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/03/01
Vol. E93-B  No. 3  pp. 650-659
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
MC-CDMAspreading codefrequency selective fading
 Summary | Full Text:PDF(740.8KB)

Adaptive Modulation and Code Channel Elimination for Vector Coding System
Daisuke TAKEDA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/05/01
Vol. E92-B  No. 5  pp. 1538-1545
Type of Manuscript:  Special Section PAPER (Special Section on Radio Access Techniques for 3G Evolution)
Category: 
Keyword: 
vector codingadaptive code channel eliminationadaptive modulation and codingchannel estimation
 Summary | Full Text:PDF(478KB)

Optimum Adaptive Modulation and Channel Coding Scheme for Frequency Domain Channel-Dependent Scheduling in OFDM Based Evolved UTRA Downlink
Nobuhiko MIKI Yoshihisa KISHIYAMA Kenichi HIGUCHI Mamoru SAWAHASHI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/05/01
Vol. E92-B  No. 5  pp. 1527-1537
Type of Manuscript:  Special Section PAPER (Special Section on Radio Access Techniques for 3G Evolution)
Category: 
Keyword: 
Evolved UTRAadaptive modulation and channel codingOFDMfrequency-domain channel-dependent scheduling
 Summary | Full Text:PDF(2.3MB)

Experimental Evaluation of Time Diversity Effect in Hybrid ARQ Considering Space and Path Diversity for Downlink OFDM-Based Broadband Radio Access
Nobuhiko MIKI Hiroyuki ATARASHI Kenichi HIGUCHI Mamoru SAWAHASHI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/05/01
Vol. E92-B  No. 5  pp. 1516-1526
Type of Manuscript:  Special Section PAPER (Special Section on Radio Access Techniques for 3G Evolution)
Category: 
Keyword: 
time diversityhybrid ARQOFDMbroadband radio access
 Summary | Full Text:PDF(1.8MB)

Turbo Equalized Double Window Cancellation and Combining Robust to Large Delay Spread Channel
JunHwan LEE Tomoaki OHTSUKI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/02/01
Vol. E92-B  No. 2  pp. 517-526
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
OFDMISIICITEDWCCHDFSDF
 Summary | Full Text:PDF(1.3MB)

Channel Capacity of MC-CDMA and Impact of Residual ICI
Koichi ADACHI Fumiyuki ADACHI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/01/01
Vol. E92-B  No. 1  pp. 219-227
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
MC-CDMAchannel capacityICI cancellationtheoretical study
 Summary | Full Text:PDF(1.6MB)

Frequency Spectrum Rotation in Interleaved Frequency Division Multiplexing
Osamu TAKYU Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/07/01
Vol. E91-B  No. 7  pp. 2357-2365
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
interleaved FDMfrequency spectrum rotation
 Summary | Full Text:PDF(1.1MB)

On Cellular MIMO Channel Capacity
Koichi ADACHI Fumiyuki ADACHI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/07/01
Vol. E91-B  No. 7  pp. 2366-2373
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
MIMOmulti-cell environemntchannel capacity
 Summary | Full Text:PDF(2.3MB)

IP Packet Loss Prevention Scheme with Bicast and Forwarding for Handover in Mobile Communications
Masahiko SAITO Akihito MORIMOTO Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/03/01
Vol. E91-B  No. 3  pp. 750-760
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
hard handoverbicastforwardingIP packet
 Summary | Full Text:PDF(1.8MB)

Relay Method of Sending Soft Decision Symbol Based on the Result of Error Detecting Code in Cooperative Communication
Yuki FUKUYAMA Osamu TAKYU Koichi ADACHI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/11/01
Vol. E90-A  No. 11  pp. 2404-2412
Type of Manuscript:  Special Section PAPER (Special Section on Wideband Systems)
Category: OFDM/Relay
Keyword: 
cooperative communicationtransmit diversitysoft decision symbolCRC
 Summary | Full Text:PDF(722.3KB)

Double Window Cancellation and Combining for OFDM in Time-Invariant Large Delay Spread Channel
JunHwan LEE Yoshihisa KISHIYAMA Tomoaki OHTSUKI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/10/01
Vol. E90-A  No. 10  pp. 2066-2078
Type of Manuscript:  Special Section PAPER (Special Section on Nonlinear Theory and its Applications)
Category: Communications and Sequences
Keyword: 
CP-OFDMDWCCISIICIQPSK16QAM64QAM
 Summary | Full Text:PDF(2.2MB)

Theoretical Analysis of Decision Directed Block Iterative Channel Estimation for OFDM Mobile Radio
Koichi ADACHI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/07/01
Vol. E90-B  No. 7  pp. 1764-1772
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
OFDMiterative channel estimationtheoretical analysis
 Summary | Full Text:PDF(1.1MB)

A Short Delay Relay Scheme Using Shared Frequency Repeater for UWB Impulse Radio
Chihong CHO Honggang ZHANG Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/07/01
Vol. E90-A  No. 7  pp. 1444-1451
Type of Manuscript:  PAPER
Category: Communication Theory and Signals
Keyword: 
ultra widebandUWBrepeaterpulse-position-modulationPPMrelay-delayshort range wireless communications
 Summary | Full Text:PDF(984.5KB)

Iterative Modified QRD-M Based on CRC Codes for OFDM MIMO Multiplexing
Koichi ADACHI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/06/01
Vol. E90-B  No. 6  pp. 1433-1443
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
OFDM MIMOQRD-Miterative signal detectionCRC codes
 Summary | Full Text:PDF(1.5MB)

Experimental Investigation of Modulation Method for Visible-Light Communications
Hidemitsu SUGIYAMA Shinichiro HARUYAMA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/12/01
Vol. E89-B  No. 12  pp. 3393-3400
Type of Manuscript:  PAPER
Category: Optical Wireless Communications
Keyword: 
visible-light communicationoptical wireless communicationLEDmodulationPPM
 Summary | Full Text:PDF(726.4KB)

Evaluation of Asymmetric TDD Systems Employing AMC and HARQ by Considering MCS Selection Errors
Nandar LYNN Osamu TAKYU Riaz ESMAILZADEH Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/11/01
Vol. E89-A  No. 11  pp. 3138-3147
Type of Manuscript:  Special Section PAPER (Special Section on Wide Band Systems)
Category: 
Keyword: 
TDDasymmetric slot allocationAMCMCS selection error
 Summary | Full Text:PDF(938.8KB)

PSWF-Based Direct-Sequence UWB Transmission Using Orthogonal Ternary Code Sets
Chihong CHO Honggang ZHANG Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/11/01
Vol. E89-A  No. 11  pp. 3042-3049
Type of Manuscript:  Special Section PAPER (Special Section on Wide Band Systems)
Category: 
Keyword: 
Ultra WidebandUWBProlate Spheroidal Wave FunctionsPSWFdirect sequenceternary codeS-V channel model
 Summary | Full Text:PDF(3.9MB)

Two-Stage Random-Access Using Two-Hop Relay for Multi-Hop Systems
Yoichiro MIZUNO Ryo HASEGAWA Riaz ESMAILZADEH Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/10/01
Vol. E89-A  No. 10  pp. 2630-2639
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Spread Spectrum
Keyword: 
4Gmulti-hop systemsrandom accessCDMAslotted-ALOHA
 Summary | Full Text:PDF(938.9KB)

Iterative QRM-MLD with Pilot-Assisted Decision Directed Channel Estimation for OFDM MIMO Multiplexing
Koichi ADACHI Riaz ESMAILZADEH Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/07/01
Vol. E89-A  No. 7  pp. 1892-1902
Type of Manuscript:  Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks)
Category: 
Keyword: 
OFDM MIMOQRM-MLDchannel estimationturbo coding
 Summary | Full Text:PDF(859.2KB)

Companding System Based on Time Clustering for Reducing Peak Power of OFDM Symbol in Wireless Communications
Osamu TAKYU Tomoaki OHTSUKI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/07/01
Vol. E89-A  No. 7  pp. 1884-1891
Type of Manuscript:  Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks)
Category: 
Keyword: 
peak power problemOFDM symbolcompressing and expanding (companding) system
 Summary | Full Text:PDF(467.7KB)

A Sign Selection Method of Orthogonal Variable Spreading Factor Code for Peak Power Reduction in Multi-Rate OFCDM Systems
Osamu TAKYU Tomoaki OHTSUKI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/04/01
Vol. E89-B  No. 4  pp. 1333-1345
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
OFCDMmulti-rate communicationOVSF codepeak power problem
 Summary | Full Text:PDF(1.3MB)

Visible Light Communication with LED Traffic Lights Using 2-Dimensional Image Sensor
Haswani BINTI CHE WOOK Shinichiro HARUYAMA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/03/01
Vol. E89-A  No. 3  pp. 654-659
Type of Manuscript:  Special Section PAPER (Special Section on Multidimensional Signal Processing and Its Application)
Category: Communications
Keyword: 
visible lights communicationsLED traffic lightstraffic information system2-dimensional image sensor
 Summary | Full Text:PDF(478.6KB)

Criterion for Reducing Error Rate Degradation by Nonlinear Amplifier for Multicarrier Transmission
Osamu TAKYU Tomoaki OHTSUKI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/07/01
Vol. E88-B  No. 7  pp. 3057-3061
Type of Manuscript:  LETTER
Category: Wireless Communication Technologies
Keyword: 
multi-carrier transmissionnonlinear distortionpeak power problem
 Summary | Full Text:PDF(289.8KB)

Analysis of Performance Degradation due to Channel Estimation Error in Pre-Rake TDD/CDMA
Norharyati BINTI HARUM Yuh TAMURA Sigit P.W. JAROT Riaz ESMAILZADEH Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/06/01
Vol. E88-B  No. 6  pp. 2508-2515
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
RakePre-Rakechannel estimationTDD-CDMA
 Summary | Full Text:PDF(665.7KB)

Pre-Rake Scheme for UWB-IR System with Guard-Time in Multipath Fading Channel
Kazuto USUDA Honggang ZHANG Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/10/01
Vol. E87-A  No. 10  pp. 2630-2638
Type of Manuscript:  Special Section PAPER (Special Section on Wide Band Systems)
Category: 
Keyword: 
Ultra WidebandUWBimpulse radioRakePre-Raketransmit diversityguard-timePSWFprolatespheroidal
 Summary | Full Text:PDF(1.2MB)

Frequency Offset Compensation with MMSE-MUD for Multi-Carrier CDMA in Quasi-Synchronous Uplink
Osamu TAKYU Tomoaki OHTSUKI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2004/06/01
Vol. E87-B  No. 6  pp. 1495-1504
Type of Manuscript:  PAPER
Category: Wireless Communication Technology
Keyword: 
MC-CDMAMMSE-MUDfrequency offset compensationquasi-synchronousuplink
 Summary | Full Text:PDF(758.8KB)

Peak Power Reduction for MC-CDMA Using Cluster Assigned Code Selection
Takeo FUJII Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/09/01
Vol. E86-B  No. 9  pp. 2637-2647
Type of Manuscript:  PAPER
Category: Wireless Communication Technology
Keyword: 
MC-CDMApeak power problemcode selectioncode detection error recovering
 Summary | Full Text:PDF(1.5MB)

Indoor Visible Light Data Transmission System Utilizing White LED Lights
Yuichi TANAKA Toshihiko KOMINE Shinichiro HARUYAMA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/08/01
Vol. E86-B  No. 8  pp. 2440-2454
Type of Manuscript:  PAPER
Category: Optical Wireless Communications
Keyword: 
optical wireless communicationwhite LED lightilluminanceluminous intensityRMS delay spreadindoor visible light communication system
 Summary | Full Text:PDF(1.3MB)

Multiple Antenna Transmitter Diversity by Using Adaptive Carrier Selection for OFDM-DS/CDMA in a Frequency Selective Fading Channel
Kyesan LEE Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/05/01
Vol. E86-B  No. 5  pp. 1605-1611
Type of Manuscript:  PAPER
Category: Wireless Communication Technology
Keyword: 
OFDM-DS/CDMARAKE diversitydistributed antennacarrier selectionISIfrequency selective fading
 Summary | Full Text:PDF(820KB)

Optimal Access Point Placement in Simultaneous Broadcast OFDM for Public Access Wireless LAN
Mari KOBAYASHI Shinichiro HARUYAMA Ryuji KOHNO Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/10/01
Vol. E85-B  No. 10  pp. 1978-1986
Type of Manuscript:  Special Section PAPER (Special Issue on Mobile Multimedia Communications)
Category: 
Keyword: 
access pointOFDMsimulated annealingwireless LAN
 Summary | Full Text:PDF(583.3KB)

Accuracy Evaluation of Mobile Terminal Positioning Using Broadband Cellular System
Arata INABA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/10/01
Vol. E85-B  No. 10  pp. 2068-2075
Type of Manuscript:  Special Section PAPER (Special Issue on Mobile Multimedia Communications)
Category: 
Keyword: 
W-CDMApath-searchOFDMcorrelation
 Summary | Full Text:PDF(1.1MB)

Joint System of Terrestrial and High Altitude Platform Station (HAPS) Cellular for W-CDMA Mobile Communications
Shinya MASUMURA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/10/01
Vol. E85-B  No. 10  pp. 2051-2058
Type of Manuscript:  Special Section PAPER (Special Issue on Mobile Multimedia Communications)
Category: 
Keyword: 
high altitude platform station (HAPS)stratospheric airshipsW-CDMA mobile communication systemssystem capacity
 Summary | Full Text:PDF(812.9KB)

Performance of Broadband MC-CDMA Systems with Transmit Diversity
Incheol JEONG Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/10/01
Vol. E85-B  No. 10  pp. 1937-1943
Type of Manuscript:  Special Section PAPER (Special Issue on Mobile Multimedia Communications)
Category: 
Keyword: 
multicarrierCDMAtransmit diversity
 Summary | Full Text:PDF(723.5KB)

Quasi-Synchronous Multi-Carrier Time Division Duplex DS-CDMA in Reverse Link over Multipath Fading Channel
Pheeradej NANAN Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/09/01
Vol. E85-B  No. 9  pp. 1668-1675
Type of Manuscript:  PAPER
Category: Wireless Communication Technology
Keyword: 
multicarrierDS-CDMAquasi-synchronoustime division duplex (TDD)reverse link
 Summary | Full Text:PDF(764.1KB)

Adaptive Clipping Level Control for OFDM Peak Power Reduction Using Clipping and Filtering
Takeo FUJII Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2002/07/01
Vol. E85-A  No. 7  pp. 1647-1655
Type of Manuscript:  Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks)
Category: 
Keyword: 
OFDMpeak power problemclipping and filteringadaptive clipping level control
 Summary | Full Text:PDF(1.1MB)

Pipeline Repeater for Wireless Homelink
Kou KOBAYASHI Tomoyuki UDAGAWA Honggang ZHANG Takemi ARITA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/07/01
Vol. E85-B  No. 7  pp. 1283-1292
Type of Manuscript:  PAPER
Category: Terrestrial Radio Communications
Keyword: 
Wireless HomelinkWireless 1394wireless repeaterisochronous transferdirectional antenna
 Summary | Full Text:PDF(1.1MB)

Intra-Vehicle Wireless 1394 System
Kazuya TAKAHASHI Tomoyuki UDAGAWA Honggang ZHANG Takemi ARITA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/05/01
Vol. E85-B  No. 5  pp. 938-945
Type of Manuscript:  Special Section PAPER (Wireless Communications Issue)
Category: 
Keyword: 
intra-vehicle wireless LANWireless 1394interference
 Summary | Full Text:PDF(804.8KB)

Closed-Loop Mode Phase Controlled Transmit Diversity for OFDM Using Difference Information of Phase Component among Adjacent Subcarriers
Shigenori UCHIDA Takeo FUJII Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/03/01
Vol. E85-B  No. 3  pp. 573-581
Type of Manuscript:  PAPER
Category: Fundamental Theories
Keyword: 
closed loop mode transmit diversityOFDMbroadband wireless channel
 Summary | Full Text:PDF(1.1MB)

Unicast and Broadcast Packet Sharing Method for OFDM Multi-Base Station System with Array Antenna on Mobile Terminal
Takeo FUJII Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/02/01
Vol. E85-B  No. 2  pp. 514-522
Type of Manuscript:  PAPER
Category: Wireless Communication Technology
Keyword: 
OFDMunicast and broadcast packetadaptive array antennafrequency sharingmulti base station
 Summary | Full Text:PDF(428.8KB)

Weighting Factor Estimation Methods for Partial Transmit Sequences OFDM to Reduce Peak Power
Takeo FUJII Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/01/01
Vol. E85-B  No. 1  pp. 221-230
Type of Manuscript:  PAPER
Category: Wireless Communication Technology
Keyword: 
OFDMpeak power problempartial transmit sequences (PTS)weight estimation
 Summary | Full Text:PDF(1.1MB)

Wireless CATV Uplink System with Subcarrier Modulation Using Infrared Communications for Apartment Houses
Yuichi TANAKA Kazuhiro TOMIOKA Masatoshi TAKANO Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/12/01
Vol. E84-B  No. 12  pp. 3235-3242
Type of Manuscript:  PAPER
Category: Optical Wireless Communications
Keyword: 
wireless infrared communicationsCATVcable modemoptical subcarrier modulation
 Summary | Full Text:PDF(972.8KB)

Multiple Antenna Transmission System Using RAKE Combining Diversity for a Multi-Carrier DS/CDMA in a Frequency Selective Fading Channel
Kyesan LEE Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/04/01
Vol. E84-B  No. 4  pp. 739-746
Type of Manuscript:  Special Section PAPER (Special Issue on Mobile Multimedia Communications)
Category: 
Keyword: 
OFDM-DS/CDMARAKE diversitydistributed antennacarrier selectionfrequency selective fading
 Summary | Full Text:PDF(869.8KB)

Adaptive Base Station Sector Antenna Pre-Selection Transmitter Diversity Using CDMA Forward Link Signal for Indoor Wireless LAN
Kyesan LEE Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2000/11/25
Vol. E83-B  No. 11  pp. 2464-2473
Type of Manuscript:  PAPER
Category: Terrestrial Radio Communications
Keyword: 
PSAP diversityfeedback systemweight informations
 Summary | Full Text:PDF(1.5MB)

A Handoff Examination of a Hybrid System Using Cellular and Ad-Hoc Modes
Tomoko ADACHI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2000/11/25
Vol. E83-B  No. 11  pp. 2494-2500
Type of Manuscript:  PAPER
Category: Wireless Communication Switching
Keyword: 
cellular systemad-hoc communicationoperational mobile robot
 Summary | Full Text:PDF(860.4KB)

Frequency Sharing CDMA Wireless LAN Using Uplink Band of P-MP TDMA Broadband Wireless Access
Takeo FUJII Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2000/07/25
Vol. E83-B  No. 7  pp. 1435-1444
Type of Manuscript:  PAPER
Category: Wireless Communication Technology
Keyword: 
wireless LANbroadband wireless accessfrequency sharing systemCDMA
 Summary | Full Text:PDF(908.3KB)

Inter-Modulation Compensation for Multi-Carrier M-ary/SS System
Koji HORISAKI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/12/25
Vol. E82-A  No. 12  pp. 2643-2648
Type of Manuscript:  Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications)
Category: 
Keyword: 
nonlinear amplificationmulti-carrier M-ary/SS modulationconvolutional code
 Summary | Full Text:PDF(795.9KB)

Spread Spectrum Inter-Vehicle Communication Using Sector Antennas
Lachlan B. MICHAEL Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/12/25
Vol. E82-A  No. 12  pp. 2627-2633
Type of Manuscript:  Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications)
Category: 
Keyword: 
spread spectruminter-vehicle communicationsector antennaspower control
 Summary | Full Text:PDF(771.1KB)

Multi-Carrier DS-CDMA Using Frequency Spread Coding
Hideyuki MATSUTANI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/12/25
Vol. E82-A  No. 12  pp. 2634-2642
Type of Manuscript:  Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications)
Category: 
Keyword: 
frequency selective fadingmulti-carrier DS-CDMAfrequency spread codingfrequency diversity
 Summary | Full Text:PDF(1.1MB)

Analysis of the Relation between Chip Rate and Capacity in DS/CDMA Cellular Systems Considering Adjacent Channel Interference
Kouta KINOSHITA Hiroyuki ATARASHI Yoshihiro ISHIKAWA Seizo ONOE Yoshinobu NAKAMURA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/12/25
Vol. E82-A  No. 12  pp. 2697-2705
Type of Manuscript:  Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications)
Category: 
Keyword: 
chip rateDS/CDMAadjacent channel interference
 Summary | Full Text:PDF(1.2MB)

Wireless Home Link
Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1999/12/25
Vol. E82-B  No. 12  pp. 1893-1896
Type of Manuscript:  INVITED PAPER (Special Issue on Multimedia Mobile Communication Systems)
Category: 
Keyword: 
IEEE 1394SOHOwireless LANDV
 Summary | Full Text:PDF(369.1KB)

A Time Division Duplex CDMA System Using Asymmetric Modulation Scheme in Duplex Channel
Incheol JEONG Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1999/12/25
Vol. E82-B  No. 12  pp. 1956-1963
Type of Manuscript:  Special Section PAPER (Special Issue on Multimedia Mobile Communication Systems)
Category: 
Keyword: 
multi-carrierCDMAtransmission diversity
 Summary | Full Text:PDF(791.5KB)

Each Carrier Transmission Power Control for the Reverse Link of OFDM-DS-CDMA System
Sigit Puspito Wigati JAROT Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1999/11/25
Vol. E82-B  No. 11  pp. 1851-1857
Type of Manuscript:  PAPER
Category: Mobile Communication
Keyword: 
multi-carrier DS-CDMAOFDMtransmission power controlfrequency selective fading
 Summary | Full Text:PDF(670.2KB)

Non-Platoon Inter-Vehicle Communication Using Multiple Hops
Lachlan B. MICHAEL Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1999/10/25
Vol. E82-B  No. 10  pp. 1651-1658
Type of Manuscript:  PAPER
Category: Mobile Communication
Keyword: 
inter-vehicle communicationmulti-hopITSwireless communication
 Summary | Full Text:PDF(721.9KB)

An Efficient ARQ Scheme for Multi-Carrier Modulation Systems Based on Packet Combining
Hiroyuki ATARASHI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1999/05/25
Vol. E82-B  No. 5  pp. 731-739
Type of Manuscript:  PAPER
Category: Mobile Communication
Keyword: 
ARQmulti-carrier modulationpacket combiningadaptive data order rearrangement
 Summary | Full Text:PDF(618.8KB)

A Computational Cost Reduction Scheme for a Post-Distortion Type Nonlinear Distortion Compensator of OFDM Signals
Hiroyuki ATARASHI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/12/25
Vol. E81-B  No. 12  pp. 2334-2342
Type of Manuscript:  Special Section PAPER (Special Issue on the Latest Development of Telecommunication Research)
Category: Wireless Communication Systems
Keyword: 
OFDMnonlinear distortionpost-distortion type nonlinear distortion compensatormaximum likelihood detection
 Summary | Full Text:PDF(715.9KB)

Orthogonal Multicode OFDM-DS/CDMA System Using Partial Bandwidth Transmission
Daisuke TAKEDA Hiroyuki ATARASHI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/11/25
Vol. E81-B  No. 11  pp. 2183-2190
Type of Manuscript:  PAPER
Category: Radio Communication
Keyword: 
OFDM-DS/CDMARAKEfrequency selective fadingpartial bandwidth transmissionpacket communication
 Summary | Full Text:PDF(665.1KB)

Interference Cancellation for Common Code Multiple Access Transmission
Shoichiro INUI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/09/25
Vol. E81-B  No. 9  pp. 1741-1748
Type of Manuscript:  PAPER
Category: Communication Theory
Keyword: 
side-lobe cancellercommon codechip shift transmissionperfect/half/no collision
 Summary | Full Text:PDF(665KB)

A Novel Transmission Diversity System in TDD-CDMA
Incheol JEONG Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/07/25
Vol. E81-B  No. 7  pp. 1409-1416
Type of Manuscript:  Special Section PAPER (Special Issue on Third Generation Land Mobile Communication Systems)
Category: 
Keyword: 
direct sequence spread spectrumcode division multiple accesspre-raketransmission diversitytime division duplex
 Summary | Full Text:PDF(614.2KB)

A Study on Channel Usage in a CellularAd-Hoc United Communication System for Operational Robots
Tomoko ADACHI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/07/25
Vol. E81-B  No. 7  pp. 1500-1507
Type of Manuscript:  PAPER
Category: Mobile Communication
Keyword: 
cellular systemad-hoc communicationoperational mobile robot
 Summary | Full Text:PDF(632KB)

Direct Sequence Code Division Multiple Access With Optical Multicarriers and Parallel FEC Codes
Raziq Pervez YAQUB Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/04/25
Vol. E81-B  No. 4  pp. 785-797
Type of Manuscript:  PAPER
Category: Mobile Communication
Keyword: 
CDMAoptical communicationmulticarrier transmissionparallel FEC
 Summary | Full Text:PDF(1021.5KB)

Optical Parallel Transmission with Multi-Wavelength for High Speed Communications on Indoor Channels
Yuichi TANAKA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/04/25
Vol. E81-B  No. 4  pp. 729-736
Type of Manuscript:  PAPER
Category: Optical Communication
Keyword: 
optical wireless LANintersymbol interference (ISI)multipath dispersive channel multi-wavelength transmissionparallel coding
 Summary | Full Text:PDF(611.4KB)

Intermodulation Compensation Using Code Reversal Technique for Orthogonal Multi-Carrier Modulation
Atsuo HORIBE Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/01/25
Vol. E81-B  No. 1  pp. 96-103
Type of Manuscript:  PAPER
Category: Mobile Communication
Keyword: 
orthogonal multi-carrier modulationintermodulation distortionpeak powercode reversal technique
 Summary | Full Text:PDF(604.8KB)

Orthogonalization Using Multicarrier Pre-Decorrelation in a Multipath Fading Channel
Hideyuki MATSUTANI Yukitoshi SANADA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1997/12/25
Vol. E80-A  No. 12  pp. 2470-2476
Type of Manuscript:  Special Section PAPER (Special Section on Spread Spectrum Techniques and Applications)
Category: 
Keyword: 
orthogonalizationpre-decorrelationmultipath fadingmulticarrier modulation
 Summary | Full Text:PDF(500.2KB)

Cancellation Technique Used for DS-CDMA Signal in Nonlinear Optical Link
Wei HUANG Essam A. SOUROUR Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1997/09/25
Vol. E80-A  No. 9  pp. 1616-1624
Type of Manuscript:  Special Section PAPER (Special Section on Nonlinear Theory and its Applications)
Category: 
Keyword: 
microcellular radio DS-CDMA using optical linkmultiuser detectionmulti-stage cancellationmultiuser interferencenonlinear distortion
 Summary | Full Text:PDF(622.7KB)

Partial Capture Effect for Multi-Carrier Radio Packet Communication Network
Hiroyuki ATARASHI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1997/02/25
Vol. E80-B  No. 2  pp. 372-378
Type of Manuscript:  PAPER
Category: Radio Communication
Keyword: 
multi carrier modulationpartial capture effectthroughputaverage number of transmissions
 Summary | Full Text:PDF(518.7KB)

Fast Viterbi Decoding Methods for the Co-channel Interference Canceller on Cellular DS/CDMA Systems
Daisuke TAKEDA Yukitoshi SANADA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1996/12/25
Vol. E79-A  No. 12  pp. 2002-2009
Type of Manuscript:  Special Section PAPER (Special Secton on Spread Spectrum Techniques and Applications)
Category: 
Keyword: 
Viterbi decoder
 Summary | Full Text:PDF(579.9KB)

Parallel Coded Optical Multicarrier Frequency Division Multiplexing-;A Potential Step towards High Speed, High Capacity and High Reliability in Optical Transmission Systems
RAZIO Pervez Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1996/11/25
Vol. E79-B  No. 11  pp. 1677-1687
Type of Manuscript:  PAPER
Category: Optical Communication
Keyword: 
parallel codingoptical multicarrier FDMHsiao codeserror correctionerror erasure correction
 Summary | Full Text:PDF(862.9KB)

Spread-Spectrum Sharing Using Comb Spectrum Structure in a Microcell/Macrocell Cellular Architecture
Tomoko ADACHI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1996/10/25
Vol. E79-B  No. 10  pp. 1577-1585
Type of Manuscript:  PAPER
Category: Mobile Communication
Keyword: 
microcell/macrocell cellular architectureSS sharingCDMATDMAcomb spectrum structure
 Summary | Full Text:PDF(646.1KB)

Power Control Techniques in a Multihop CDMA Packet Radio Network
Yukitoshi SANADA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1996/09/25
Vol. E79-B  No. 9  pp. 1287-1294
Type of Manuscript:  Special Section PAPER (Special Issue on Personal Communications)
Category: Advanced control techniques and channel assignments
Keyword: 
power controlCDMApacket radio network
 Summary | Full Text:PDF(569.8KB)

Fast Frequency-Hopped MFSK with Multi-Antenna Transmission Diversity System for Indoor Radio Channel
Jun PENG Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1996/09/25
Vol. E79-B  No. 9  pp. 1366-1370
Type of Manuscript:  Special Section PAPER (Special Issue on Personal Communications)
Category: Indoor Wireless Systems
Keyword: 
indoor radio channelflat Rayleigh fadingfast ferquency-hoppingmulti-antennatransmission diversity
 Summary | Full Text:PDF(348KB)

R-ALOHA Protocol for SS Inter-Vehicle Communication Network Using Head Spacing Information
Young-an KIM Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1996/09/25
Vol. E79-B  No. 9  pp. 1309-1315
Type of Manuscript:  Special Section PAPER (Special Issue on Personal Communications)
Category: CDMA and multiple access technologies
Keyword: 
inter-vehicle communication networkspread spectrumR-ALOHA protocolhead spaing information
 Summary | Full Text:PDF(564.1KB)

Hybrid DS/SFH-TDD Cellular System with Adaptive Hopping Pattern Control
Kazunori AKABANE Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1996/09/25
Vol. E79-B  No. 9  pp. 1256-1261
Type of Manuscript:  Special Section PAPER (Special Issue on Personal Communications)
Category: Modulation, Equalization and interference cancellation technologies
Keyword: 
hybrid DS/SFH systemTDD systempower controladaptive hopping pattern controlcellular system
 Summary | Full Text:PDF(500.3KB)

Channel Coding with MPSK/Orthogonal Multi-Carrier Transmission
Wei HUANG Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1996/09/25
Vol. E79-A  No. 9  pp. 1401-1407
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Communication/Spread Spectrum
Keyword: 
orthogonal multi-carriertrellis coded modulation
 Summary | Full Text:PDF(526.1KB)

Antenna and Multi-Carrier Combined Diversity System
Hideyuki TAKAHASHI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1996/09/25
Vol. E79-B  No. 9  pp. 1221-1226
Type of Manuscript:  Special Section PAPER (Special Issue on Personal Communications)
Category: Antenna and diversity techniques
Keyword: 
multi-carrier modulationTDD systempre-diversity
 Summary | Full Text:PDF(517.5KB)

Semiconductor Laser's Nonlinearity Compensation for DS-CDMA Optical Transmission System by Post Nonlinearity Recovery Block
Pervez RAZIQ Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1996/03/25
Vol. E79-B  No. 3  pp. 424-431
Type of Manuscript:  PAPER
Category: Optical Communication
Keyword: 
post nonlinearity recovery block (PNRB)intermodulation distortionvolterra series
 Summary | Full Text:PDF(537.9KB)

Quasi-Synchronous Time Division Duplex CDMA
Riaz ESMAILZADEH Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1995/09/25
Vol. E78-A  No. 9  pp. 1201-1205
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: 
Keyword: 
code division multiple accessquasi-synchronoustime division duplexco-channel interference
 Summary | Full Text:PDF(381.9KB)

A Channel Equalization Technique on a Time Division Duplex CDMA/TDMA System for Wireless Multimedia Networks
Yukitoshi SANADA Kazuhiko SEKI Qiang WANG Shuzo KATO Masao NAKAGAWA Vijay K. BHARGAVA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1995/08/25
Vol. E78-B  No. 8  pp. 1105-1116
Type of Manuscript:  Special Section PAPER (Special Issue on Technologies for High-Speed Mobile Communications)
Category: 
Keyword: 
channel equalizertime division duplexTDMACDMAmultimedia network
 Summary | Full Text:PDF(995.1KB)

A Transmission Power Control Technique on a TDD-CDMA/TDMA System for Wireless Multimedia Networks
Yukitoshi SANADA Kazuhiko SEKI Qiang WANG Shuzo KATO Masao NAKAGAWA Vijay K. BHARGAVA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1995/08/25
Vol. E78-B  No. 8  pp. 1095-1104
Type of Manuscript:  Special Section PAPER (Special Issue on Technologies for High-Speed Mobile Communications)
Category: 
Keyword: 
transmission power controltime division duplexTDMACDMAmultimedia network
 Summary | Full Text:PDF(842.3KB)

FOREWORD
Masao NAKAGAWA Yukitsuna FURUYA Toshikazu KODAMA Ryuji KOHNO Yoichi SAITO Yoshinori SAKAI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1995/08/25
Vol. E78-B  No. 8  pp. 1087-1088
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(238.4KB)

Partial Frequency ARQ System for Multi-Carrier Packet Communication
Hiroyuki ATARASHI Riaz ESMAILZADEH Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1995/08/25
Vol. E78-B  No. 8  pp. 1197-1203
Type of Manuscript:  Special Section PAPER (Special Issue on Technologies for High-Speed Mobile Communications)
Category: 
Keyword: 
multi-carrier modulationPartial Frequency ARQ systemStatic Carrier AssignmentDynamic Carrier Assignment
 Summary | Full Text:PDF(523.2KB)

Nonlinear Effect of Direct-Sequence CDMA in Optical Transmission
Wei HUANG Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1995/05/25
Vol. E78-B  No. 5  pp. 702-708
Type of Manuscript:  Special Section PAPER (Special Issue on Optical Signal Processing and Its Applications to Telecommunications)
Category: 
Keyword: 
laser diode nonlinearitydirect-sequence CDMAoptical transmission
 Summary | Full Text:PDF(491.1KB)

FOREWORD
Yoshihiko AKAIWA Shuzo KATO Masao NAKAGAWA Ryuji KOHNO Shinsuke HARA Nobuo NAKAJIMA Yukitsuna FURUYA Kouichi HONMA Eisuke FUKUDA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1994/07/25
Vol. E77-B  No. 7  pp. 853-854
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(192.7KB)

Quick Learning for Bidirectional Associative Memory
Motonobu HATTORI Masafumi HAGIWARA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 1994/04/25
Vol. E77-D  No. 4  pp. 385-392
Type of Manuscript:  Special Section PAPER (Special Issue on Neurocomputing)
Category: Learning
Keyword: 
Bidirectional Associative Memory (BAM)Hebbian learningPseudo-Relaxation Learning Algorithm for BAM (PRLAB)
 Summary | Full Text:PDF(656.1KB)

A Proposal of a Recognition System for the Specices of Birds Receiving Birdcalls--An Application of Recognition Systems for Environmental Sound--
Takehiko ASHIYA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1993/10/25
Vol. E76-A  No. 10  pp. 1858-1860
Type of Manuscript:  LETTER
Category: Acoustics
Keyword: 
environmental soundenvironmental observation systemsound recognitionbirdcallsa species of brid
 Summary | Full Text:PDF(223.1KB)

Atmospheric Optical Communication System Using Subcarrier PSK Modulation
Wei HUANG Jiro TAKAYANAGI Tetsuo SAKANAKA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1993/09/25
Vol. E76-B  No. 9  pp. 1169-1177
Type of Manuscript:  Special Section PAPER (Special Issue on Fiber-optic Microcelluler Radio Communication System and Their Technologies)
Category: Propagation Matters
Keyword: 
atmospheric optical communicationscintillationsubcarrier modulationintermodulation distortion
 Summary | Full Text:PDF(666.3KB)

Some Ideas of Modulation Systems for Quantum Communications
Masao OSAKI Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1993/09/25
Vol. E76-A  No. 9  pp. 1449-1457
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: 
Keyword: 
squeezed lightsqueezing spectrumparametric amplificationoptical bistabilitydetection phase
 Summary | Full Text:PDF(779.5KB)

Adaptive RAKE Receiver for Mobile Communications
Yukitoshi SANADA Akihiro KAJIWARA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1993/08/25
Vol. E76-B  No. 8  pp. 1002-1007
Type of Manuscript:  Special Section PAPER (Special Issue on Spread Spectrum Techniques and Applications)
Category: 
Keyword: 
spread spectrummobile communicationRAKE systemfading
 Summary | Full Text:PDF(441.6KB)

FOREWORD
Masao NAKAGAWA Ryuji KOHNO Shin'ichi TACHIKAWA Taka-aki HASEGAWA Tetsushi IKEGAMI Eisuke FUKUDA Yukitsuna FURUYA Shuzo KATO Masashi SATOH Hisao TACHIKA Yoshihiro TANADA Kazuo TSUBOUCHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1993/08/25
Vol. E76-B  No. 8  pp. 801-803
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(453.8KB)

Pre-RAKE Diversity Combination for Direct Sequence Spread Spectrum Mobile Communications Systems
Riaz ESMAILZADEH Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1993/08/25
Vol. E76-B  No. 8  pp. 1008-1015
Type of Manuscript:  Special Section PAPER (Special Issue on Spread Spectrum Techniques and Applications)
Category: 
Keyword: 
RakePre-Rakespread spectrum transmission in fading channelsdirect sequence spread spectrumtime division duplexfrequency division duplex
 Summary | Full Text:PDF(592KB)

A Delay Lock Loop for Mobile Communications in the Presence of Multipath Fading
Makoto TAKEUCHI Akihiro KAJIWARA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1993/08/25
Vol. E76-B  No. 8  pp. 1039-1046
Type of Manuscript:  Special Section PAPER (Special Issue on Spread Spectrum Techniques and Applications)
Category: 
Keyword: 
mobile communicationsmultipath fading channelsDelay Lock Looptracking
 Summary | Full Text:PDF(567.4KB)

Time Division Duplex Method of Transmission of Direct Sequence Spread Spectrum Signals for Power Control Implementation
Riaz ESMAILZADEH Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1993/08/25
Vol. E76-B  No. 8  pp. 1030-1038
Type of Manuscript:  Special Section PAPER (Special Issue on Spread Spectrum Techniques and Applications)
Category: 
Keyword: 
time division duplexspread spectrum transmission power control in Rayleigh fading channelsdirect sequence spread spectrumcode division multiple access
 Summary | Full Text:PDF(703.5KB)

FOREWORD
Fumio KANAYA Masao NAKAGAWA Osamu HIROTA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1992/06/25
Vol. E75-B  No. 6  pp. 435-436
Type of Manuscript:  FOREWORD
Category: 
Keyword: 
 Summary | Full Text:PDF(182.2KB)

Crosscorrelation Cancellation in SS/DS Block Demodulator
Akihiro KAJIWARA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1991/09/25
Vol. E74-A  No. 9  pp. 2596-2602
Type of Manuscript:  Special Section PAPER (Special Issue on Information Theory and Its Applications)
Category: 
Keyword: 
 Summary | Full Text:PDF(407.8KB)

Direct-Sequence Spread-Spectrum Demodulator Using Block Signal Processing
Akihiro KAJIWARA Masao NAKAGAWA Masafumi HAGIWARA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1991/05/25
Vol. E74-B  No. 5  pp. 1108-1114
Type of Manuscript:  Special Section PAPER (Special Issue on Spread Spectrum Techniques and Its Applications)
Category: 
Keyword: 
 Summary | Full Text:PDF(500KB)

Heterodyne-Type Autocorrelator for SS-DS Communications
Akihiro KAJIWARA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1991/05/25
Vol. E74-B  No. 5  pp. 1103-1107
Type of Manuscript:  Special Section PAPER (Special Issue on Spread Spectrum Techniques and Its Applications)
Category: 
Keyword: 
 Summary | Full Text:PDF(343.4KB)

Spread Spectrum for Consumer Communications--Applications of Spread Spectrum Communications in Japan--
Masao NAKAGAWA Takaaki HASEGAWA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1991/05/25
Vol. E74-B  No. 5  pp. 1093-1102
Type of Manuscript:  INVITED PAPER (Special Issue on Spread Spectrum Techniques and Its Applications)
Category: 
Keyword: 
 Summary | Full Text:PDF(740.5KB)

A Realization of Optical Communication Using Received Quantum State Control
Seitetsu BUN Tsuyoshi SASAKI Hideaki TSUSHIMA Osamu HIROTA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1990/10/25
Vol. E73-E  No. 10  pp. 1647-1656
Type of Manuscript:  Special Section PAPER (Special Issue on Communication Theory and Its Applications)
Category: Modulation and Demodulation
Keyword: 
 Summary | Full Text:PDF(859.6KB)

Block Demodulation for Trellis Coded Modulation
Yutaka MIYAKE Masafumi HAGIWARA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1990/10/25
Vol. E73-E  No. 10  pp. 1674-1680
Type of Manuscript:  Special Section PAPER (Special Issue on Communication Theory and Its Applications)
Category: Modulation and Demodulation
Keyword: 
 Summary | Full Text:PDF(545.9KB)

Properties of Photon Counting System with Squeezed State Signal in Loss Channel
Seitetsu BUN Kouichi YAMAZAKI Osamu HIROTA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1989/09/25
Vol. E72-E  No. 9  pp. 953-956
Type of Manuscript:  LETTER
Category: Optical Communication
Keyword: 
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Application of Quantum State Control to Optical Phase-Locked Loop
Yoshihiro YOSHIDA Masao NAKAGAWA Osamu HIROTA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1989/05/25
Vol. E72-E  No. 5  pp. 539-546
Type of Manuscript:  Special Section PAPER (Special Issue on Information Theory and Its Applications)
Category: 
Keyword: 
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Effect of Asymmetric Error Correcting Codes in Photon Communication Systems
Tomohiko UYEMATSU Kouichi YAMAZAKI Osamu HIROTA Masao NAKAGAWA Kohichi SAKANIWA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1988/09/25
Vol. E71-E  No. 9  pp. 850-857
Type of Manuscript:  PAPER
Category: Information Theory and Coding Theory
Keyword: 
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Optimum Condition of Squeezed State Signal for Optical Communication with Energy Loss
Kouichi YAMAZAKI Osamu HIROTA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1988/08/25
Vol. E71-E  No. 8  pp. 775-783
Type of Manuscript:  PAPER
Category: Communication Theory
Keyword: 
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Imaging the Acoustic Nonlinearity Parameter with Finite-Amplitude Sound Waves: The Difference-Frequency Method and the Second-Harmonic Method
Yoshikatsu NAKAGAWA Wayne HOU Anni CAI Glen WADE Masao NAKAGAWA Masahide YONEYAMA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1988/08/25
Vol. E71-E  No. 8  pp. 799-809
Type of Manuscript:  PAPER
Category: Medical Electronics and Medical Information
Keyword: 
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Properties of Coherent Optical Communication with Received Quantum State Control and Its Capacity
Osamu HIROTA Yoshihiro YOSHIDA Masao NAKAGAWA Mikio TAKAHARA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1988/04/25
Vol. E71-E  No. 4  pp. 372-375
Type of Manuscript:  LETTER
Category: Optical Communication
Keyword: 
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Comparison between Photon Communication Systems and Quantum Coherent Communication Systems
Kouichi YAMAZAKI Osamu HIROTA Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1987/09/25
Vol. E70-E  No. 9  pp. 835-840
Type of Manuscript:  PAPER
Category: Communication Theory
Keyword: 
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Effect of Error Correcting Code in Photon Communications with Energy Loss
Kouichi YAMAZAKI Osamu HIROTA Masao NAKAGAWA Tomohiko UYEMATSU Masanori OHYA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1987/08/25
Vol. E70-E  No. 8  pp. 689-692
Type of Manuscript:  LETTER
Category: Foundations of Signal Theory and Communication Theory
Keyword: 
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Properties of Cutoff Rate for Photon Channels
Osamu HIROTA Kouichi YAMAZAKI Yota ENDO Masao NAKAGAWA Mikio TAKAHARA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1987/01/25
Vol. E70-E  No. 1  pp. 7-10
Type of Manuscript:  LETTER
Category: Communication Theory
Keyword: 
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Properties of Error Correcting Code Using Photon Pulse
Osamu HIROTA Kouichi YAMAZAKI Masao NAKAGAWA Masanori OHYA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1986/09/25
Vol. E69-E  No. 9  pp. 917-919
Type of Manuscript:  LETTER
Category: Communication Theory
Keyword: 
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Behaviors of Phase-Locked Loops and Delay-Locked Loops in the Presence of Interfering Signals
Masao NAKAGAWA 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1979/10/25
Vol. E62-E  No. 10  pp. 656-663
Type of Manuscript:  PAPER
Category: Electronic Circuits
Keyword: 
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