Kazuaki TAKEDA


Investigation on Non-Orthogonal Multiple Access with Reduced Complexity Maximum Likelihood Receiver and Dynamic Resource Allocation
Yousuke SANO Kazuaki TAKEDA Satoshi NAGATA Takehiro NAKAMURA Xiaohang CHEN Anxin LI Xu ZHANG Jiang HUILING Kazuhiko FUKAWA 
Publication:   
Publication Date: 2017/08/01
Vol. E100-B  No. 8  pp. 1301-1311
Type of Manuscript:  Special Section PAPER (Special Section on Radio Access Technologies for 5G Mobile Communications System)
Category: Wireless Communication Technologies
Keyword: 
non-orthogonal multiple accessreduced complexity-maximum likelihood receiverlink to system mappinguser scheduling
 Summary | Full Text:PDF(3.1MB)

Demodulation Reference Signal Using Two-Dimensional Orthogonal Cover Code Mapping for Multi-Antenna/Point Transmission in LTE-Advanced Downlink
Kazuaki TAKEDA Yoshihisa KISHIYAMA Tetsushi ABE Takehiro NAKAMURA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2011/12/01
Vol. E94-B  No. 12  pp. 3354-3361
Type of Manuscript:  Special Section PAPER (Special Section on Cooperative Communications for Cellular Networks)
Category: 
Keyword: 
LTE-AdvancedMIMOCoMPreference signalorthogonal cover code
 Summary | Full Text:PDF(1.8MB)

Investigation on Downlink Control Channel Structure Using Cross-Carrier Scheduling for Carrier Aggregation-Based Heterogeneous Network in LTE-Advanced
Nobuhiko MIKI Anxin LI Kazuaki TAKEDA Yuan YAN Hidetoshi KAYAMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2011/12/01
Vol. E94-B  No. 12  pp. 3312-3320
Type of Manuscript:  Special Section PAPER (Special Section on Cooperative Communications for Cellular Networks)
Category: 
Keyword: 
LTE-Advancedcarrier aggregationheterogeneous networkinter-cell interference coordinationsearch space
 Summary | Full Text:PDF(2.5MB)

Performance Comparison between CDTD and STTD for DS-CDMA/MMSE-FDE with Frequency-Domain ICI Cancellation
Kazuaki TAKEDA Yohei KOJIMA Fumiyuki ADACHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/09/01
Vol. E92-B  No. 9  pp. 2882-2890
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
DS-CDMAMMSE-FDEcyclic delay transmit diversity (CDTD)space-time transmit diversity (STTD)ICI cancellation
 Summary | Full Text:PDF(1.2MB)

2-Step Maximum Likelihood Channel Estimation for Multicode DS-CDMA with Frequency-Domain Equalization
Yohei KOJIMA Kazuaki TAKEDA Fumiyuki ADACHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/06/01
Vol. E92-B  No. 6  pp. 2065-2071
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
DS-CDMAfrequency-domain equalizationMMSEchannel estimation
 Summary | Full Text:PDF(684.3KB)

RLS Channel Estimation with Adaptive Forgetting Factor for DS-CDMA Frequency-Domain Equalization
Yohei KOJIMA Hiromichi TOMEBA Kazuaki TAKEDA Fumiyuki ADACHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/05/01
Vol. E92-B  No. 5  pp. 1457-1465
Type of Manuscript:  Special Section PAPER (Special Section on Radio Access Techniques for 3G Evolution)
Category: 
Keyword: 
DS-CDMAfrequency-domain equalizationchannel estimationRLS algorithm
 Summary | Full Text:PDF(1.1MB)

Iterative Overlap FDE for Multicode DS-CDMA
Kazuaki TAKEDA Hiromichi TOMEBA Fumiyuki ADACHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/06/01
Vol. E91-B  No. 6  pp. 1942-1951
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
DS-CDMAMMSE frequency-domain equalizationICI cancellationoverlap FDE
 Summary | Full Text:PDF(1.3MB)

BER Performance Analysis of MC-CDMA with Overlap-FDE
Hiromichi TOMEBA Kazuaki TAKEDA Fumiyuki ADACHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/03/01
Vol. E91-B  No. 3  pp. 795-804
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
frequency-selective fading channeloverlap FDEMC-CDMA
 Summary | Full Text:PDF(1.1MB)

DS-CDMA Downlink Site Diversity with Frequency-Domain Equalization and Antenna Diversity Reception
Hirotaka SATO Hiromichi TOMEBA Kazuaki TAKEDA Fumiyuki ADACHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/12/01
Vol. E90-B  No. 12  pp. 3591-3597
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
DS-CDMAfrequency-domain equalizationsite diversitylink capacity
 Summary | Full Text:PDF(835.7KB)

DS-CDMA HARQ with Overlap FDE
Kazuki TAKEDA Hiromichi TOMEBA Kazuaki TAKEDA Fumiyuki ADACHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/11/01
Vol. E90-B  No. 11  pp. 3189-3196
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
DS-CDMAHARQoverlap FDE
 Summary | Full Text:PDF(472.9KB)

Frequency-Domain MMSE Channel Estimation for Frequency-Domain Equalization of DS-CDMA Signals
Kazuaki TAKEDA Fumiyuki ADACHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/07/01
Vol. E90-B  No. 7  pp. 1746-1753
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
DS-CDMAfrequency-domain equalizationchannel estimationMMSE criterion
 Summary | Full Text:PDF(1MB)

Iterative Channel Estimation for Frequency-Domain Equalization of DSSS Signals
Koichi ISHIHARA Kazuaki TAKEDA Fumiyuki ADACHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/05/01
Vol. E90-B  No. 5  pp. 1171-1180
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
DSSSfrequency-domain equalization (FDE)channel estimation
 Summary | Full Text:PDF(1.9MB)

Frequency-Domain Multi-Stage Soft Interference Cancellation for DS-CDMA Uplink Signal Transmission
Koichi ISHIHARA Kazuaki TAKEDA Fumiyuki ADACHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/05/01
Vol. E90-B  No. 5  pp. 1152-1161
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
DS-CDMAfrequency-domain equalization (FDE)MUI cancellationmulti-user detection (MUD)
 Summary | Full Text:PDF(1.1MB)

Frequency-Domain Space-Time Block Coded-Joint Transmit/Receive Diversity for Direct-Sequence Spread Spectrum Signal Transmission
Hiromichi TOMEBA Kazuaki TAKEDA Fumiyuki ADACHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/03/01
Vol. E90-B  No. 3  pp. 597-606
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
frequency-selective fading channelfrequency-domain pre-equalizationspace-time block codingtransmit/receive antenna diversityDSSS
 Summary | Full Text:PDF(949KB)

Space-Time Cyclic Delay Transmit Diversity for a Multi-Code DS-CDMA Signal with Frequency-Domain Equalization
Ryoko KAWAUCHI Kazuaki TAKEDA Fumiyuki ADACHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/03/01
Vol. E90-B  No. 3  pp. 591-596
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
multi-code DS-CDMAFrequency-domain equalizationCyclic Delay Transmit Diversity (CDTD)Space-Time Transmit Diversity (STTD)
 Summary | Full Text:PDF(1.1MB)

Frequency-Interleaved Spread Spectrum with MMSE Frequency-Domain Equalization
Kazuaki TAKEDA Fumiyuki ADACHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2007/02/01
Vol. E90-B  No. 2  pp. 260-268
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
componentMMSE-FDEfrequency-interleaving
 Summary | Full Text:PDF(970.6KB)

Frequency-Domain ICI Cancellation with MMSE Equalization for DS-CDMA Downlink
Kazuaki TAKEDA Koichi ISHIHARA Fumiyuki ADACHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/12/01
Vol. E89-B  No. 12  pp. 3335-3343
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
DS-CDMAfrequency-domain equalizationMMSEICI cancellation
 Summary | Full Text:PDF(988.3KB)

Iterative Frequency-Domain Soft Interference Cancellation for Multicode DS- and MC-CDMA Transmissions and Performance Comparison
Koichi ISHIHARA Kazuaki TAKEDA Fumiyuki ADACHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/12/01
Vol. E89-B  No. 12  pp. 3344-3355
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
DS-CDMAMC-CDMAfrequency-domain equalization (FDE)multicodeinterference cancelation
 Summary | Full Text:PDF(1.3MB)

Space-Time Block Coded Joint Transmit/Receive Diversity in a Frequency-Nonselective Rayleigh Fading Channel
Hiromichi TOMEBA Kazuaki TAKEDA Fumiyuki ADACHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/08/01
Vol. E89-B  No. 8  pp. 2189-2195
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
antenna diversityspace-time block codingtime-division duplex
 Summary | Full Text:PDF(739.2KB)

Frequency-Domain Pre-Equalization for Multicode Direct Sequence Spread Spectrum Signal Transmission
Fumiyuki ADACHI Kazuaki TAKEDA Hiromichi TOMEBA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/07/01
Vol. E88-B  No. 7  pp. 3078-3081
Type of Manuscript:  LETTER
Category: Wireless Communication Technologies
Keyword: 
pre-equalizationfrequency-domain equalizationdirect sequence spread spectrum
 Summary | Full Text:PDF(341KB)

Performance Evaluation of Multi-Rate DS-CDMA Using Frequency-Domain Equalization in a Frequency-Selective Fading Channel
Kazuaki TAKEDA Fumiyuki ADACHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/03/01
Vol. E88-B  No. 3  pp. 1191-1201
Type of Manuscript:  PAPER
Category: Terrestrial Radio Communications
Keyword: 
DS-CDMAfrequency-domain equalizationfrequency-selective fading
 Summary | Full Text:PDF(1.1MB)

Frequency-Domain Pre-Rake Transmission for DSSS/TDD Mobile Communications Systems
Fumiyuki ADACHI Kazuaki TAKEDA Hiromichi TOMEBA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/02/01
Vol. E88-B  No. 2  pp. 784-787
Type of Manuscript:  LETTER
Category: Wireless Communication Technologies
Keyword: 
frequency-domain equalizationpre-rakespread spectrummobile radio
 Summary | Full Text:PDF(443KB)

Pilot-Assisted Decision Feedback Channel Estimation for STTD in OFDM Mobile Radio
Koichi ISHIHARA Kazuaki TAKEDA Fumiyuki ADACHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/02/01
Vol. E88-B  No. 2  pp. 561-567
Type of Manuscript:  Special Section PAPER (Special Section on Multi-carrier Signal Processing Techniques for Next Generation Mobile Communications--Part2)
Category: 
Keyword: 
pilotdecision feedbackchannel estimationOFDMSTTD
 Summary | Full Text:PDF(1.3MB)

Bit Error Rate Analysis of DS-CDMA with Joint Frequency-Domain Equalization and Antenna Diversity Combining
Fumiyuki ADACHI Kazuaki TAKEDA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2004/10/01
Vol. E87-B  No. 10  pp. 2991-3002
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
DS-CDMAfrequency-domain equalizationantenna diversitymobile radio
 Summary | Full Text:PDF(1.1MB)

Performance Comparison of Delay Transmit Diversity and Frequency-Domain Space-Time Coded Transmit Diversity for Orthogonal Multicode DS-CDMA Signal Reception Using Frequency-Domain Equalization
Takeshi ITAGAKI Kazuaki TAKEDA Fumiyuki ADACHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2004/09/01
Vol. E87-B  No. 9  pp. 2719-2728
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
multicode DS-CDMAfrequency-domain equalizationMMSEtransmit diversity
 Summary | Full Text:PDF(1.7MB)

Joint Use of Frequency-Domain Equalization and Transmit/Receive Antenna Diversity for Single-Carrier Transmissions
Kazuaki TAKEDA Takeshi ITAGAKI Fumiyuki ADACHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2004/07/01
Vol. E87-B  No. 7  pp. 1946-1953
Type of Manuscript:  PAPER
Category: Wireless Communication Technology
Keyword: 
single-carrier transmissionfrequency-domain equalizationdelay transmit diversityfrequency-selective fading
 Summary | Full Text:PDF(1MB)