Hidetoshi KAYAMA


Uplink Non-Orthogonal Multiple Access (NOMA) with Single-Carrier Frequency Division Multiple Access (SC-FDMA) for 5G Systems
Anxin LI Anass BENJEBBOUR Xiaohang CHEN Huiling JIANG Hidetoshi KAYAMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2015/08/01
Vol. E98-B  No. 8  pp. 1426-1435
Type of Manuscript:  Special Section PAPER (Special Section on 5G Radio Access Networks―Part I: Radio Access Technologies and System Design)
Category: 
Keyword: 
5G systemuplinknon-orthogonal multiple accesslow computational complexity scheduling algorithm
 Summary | Full Text:PDF(3.1MB)

A Novel Low Computational Complexity Power Assignment Method for Non-orthogonal Multiple Access Systems
Anxin LI Atsushi HARADA Hidetoshi KAYAMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2014/01/01
Vol. E97-A  No. 1  pp. 57-68
Type of Manuscript:  Special Section PAPER (Special Section on Wideband Systems)
Category: Resource Allocation
Keyword: 
non-orthogonal multiple accesspower assignmentlow computational complexitytree searchbeyond LTE system
 Summary | Full Text:PDF(4.3MB)

Achievable Capacity of Closed/Open-Access Cognitive Radio Systems Coexisting with a Macro Cellular Systems
Hiromasa FUJII Hiroki HARADA Shunji MIURA Hidetoshi KAYAMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/04/01
Vol. E95-B  No. 4  pp. 1190-1197
Type of Manuscript:  Special Section PAPER (Special Section on Cognitive Radio and Heterogeneous Wireless Networks in Conjunction with Main Topics of CrownCom2011)
Category: 
Keyword: 
spectrum sharingcapacitysystem prioritiestransmit power control
 Summary | Full Text:PDF(1.2MB)

Development and Experimental Evaluation of Cyclostationarity-Based Signal Identification Equipment for Cognitive Radios
Hiroki HARADA Hiromasa FUJII Shunji MIURA Hidetoshi KAYAMA Yoshiki OKANO Tetsuro IMAI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/04/01
Vol. E95-B  No. 4  pp. 1100-1108
Type of Manuscript:  Special Section PAPER (Special Section on Cognitive Radio and Heterogeneous Wireless Networks in Conjunction with Main Topics of CrownCom2011)
Category: 
Keyword: 
cognitive radiospectrum sharingcyclostationarity-based signal identificationtest bed experimentspatial channel emulator
 Summary | Full Text:PDF(2.3MB)

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)

Doubly-Selective Channel Estimation for MIMO-OFDM Systems with Experimental Verification
Xiaolin HOU Jianping CHEN En ZHOU Zhan ZHANG Hidetoshi KAYAMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/01/01
Vol. E92-B  No. 1  pp. 254-267
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
MIMOOFDMchannel estimationDFTGibbs phenomenon
 Summary | Full Text:PDF(1.8MB)

Wireless QoS for High-Speed CDMA Packet Cellular Systems--With Radio-Condition-Aware Admission Control and Resource Allocation Reflected Multistage Scheduling--
Narumi UMEDA Lan CHEN Hidetoshi KAYAMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/03/01
Vol. E89-B  No. 3  pp. 886-894
Type of Manuscript:  PAPER
Category: Terrestrial Radio Communications
Keyword: 
wireless QoSadaptive modulation codingradio resource managementCDMA packetadmission controlscheduling
 Summary | Full Text:PDF(1.8MB)

Intra-Cell Allocation Information and Inter-Cell Interference Distribution Based TPC for High-Speed CDMA Packet Radio
Heng QIU Hidetoshi KAYAMA Narumi UMEDA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/11/01
Vol. E88-B  No. 11  pp. 4301-4308
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
reservation access protocolTPCB3Ghigh speed packet radioCDMA
 Summary | Full Text:PDF(613.4KB)

Wireless QoS-Aware Resource Management for CDMA Packet Multimedia Cellular Radio
Lan CHEN Hidetoshi KAYAMA Narumi UMEDA Yasushi YAMAO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2003/07/01
Vol. E86-A  No. 7  pp. 1576-1584
Type of Manuscript:  Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks)
Category: 
Keyword: 
quality of servicewireless QoSradio resource managementCDMA packetmax/min requirements
 Summary | Full Text:PDF(1.9MB)

A QoS-Aware Form of Adaptive Battery Conservation Management Based on Packet Classification for Broadband Multimedia Packet-Radio Systems
Masayuki MOTEGI Hidetoshi KAYAMA Narumi UMEDA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/06/01
Vol. E86-B  No. 6  pp. 1917-1926
Type of Manuscript:  PAPER
Category: Wireless Communication Technology
Keyword: 
adaptive battery conservation managementbuffering delaybattery saving modesleep-timerpaging interval
 Summary | Full Text:PDF(902.3KB)

Wireless QoS Resource Cooperation Management for CDMA Packet Mobile Communication Systems
Lan CHEN Hidetoshi KAYAMA Narumi UMEDA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/06/01
Vol. E86-B  No. 6  pp. 1927-1935
Type of Manuscript:  PAPER
Category: Wireless Communication Technology
Keyword: 
QoSradio resource managementCDMApacket mobileresource cooperation management
 Summary | Full Text:PDF(2.5MB)

A Multi-Slot Access Protocol for TDMA-TDD Packet Radio ChannelApplication to PHS Packet Data System
Hidetoshi KAYAMA Takeo ICHIKAWA Hitoshi TAKANASHI Masahiro MORIKURA Toshiaki TANAKA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/05/25
Vol. E81-B  No. 5  pp. 1115-1125
Type of Manuscript:  PAPER
Category: Mobile Communication
Keyword: 
packet radioaccess protocolTDMA-TDDmulti-slot channel
 Summary | Full Text:PDF(1MB)

Performance Evaluation of a Packet Channel Sharing Protocol for Dynamic Channel Assignment Systems
Takeo ICHIKAWA Hidetoshi KAYAMA Masahiro MORIKURA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1998/03/25
Vol. E81-B  No. 3  pp. 616-624
Type of Manuscript:  PAPER
Category: Radio Communication
Keyword: 
packet radio communicationsDCAPHSrandom access
 Summary | Full Text:PDF(758.9KB)

A Novel Packet Data Transmission Strategy for Personal Handy-Phone System
Masataka IIZUKA Hidetoshi KAYAMA Hiroshi YOSHIDA Takeshi HATTORI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1997/05/25
Vol. E80-B  No. 5  pp. 763-769
Type of Manuscript:  PAPER
Category: Mobile Communication
Keyword: 
packet radiochannel structureTDMAthroughputPHS
 Summary | Full Text:PDF(575KB)