Takehiro NAKAMURA


Indoor and Outdoor Experiments of Downlink Transmission at 15-GHz Band for 5G Radio Access
Kiichi TATEISHI Daisuke KURITA Atsushi HARADA Yoshihisa KISHIYAMA Takehiro NAKAMURA Stefan PARKVALL Erik DAHLMAN Johan FURUSKOG 
Publication:   
Publication Date: 2017/08/01
Vol. E100-B  No. 8  pp. 1238-1246
Type of Manuscript:  Special Section PAPER (Special Section on Radio Access Technologies for 5G Mobile Communications System)
Category: Antennas and Propagation
Keyword: 
5Ghigh-SHF bandcarrier aggregationTDDsingle-user MIMOexperiments
 Summary | Full Text:PDF(5.8MB)

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)

Field Experiments on Downlink Distributed MIMO at 15-GHz Band for 5G Radio Access
Daisuke KURITA Kiichi TATEISHI Atsushi HARADA Yoshihisa KISHIYAMA Takehiro NAKAMURA Stefan PARKVALL Erik DAHLMAN Johan FURUSKOG 
Publication:   
Publication Date: 2017/08/01
Vol. E100-B  No. 8  pp. 1247-1255
Type of Manuscript:  Special Section PAPER (Special Section on Radio Access Technologies for 5G Mobile Communications System)
Category: Wireless Communication Technologies
Keyword: 
5Ghigher frequency bandsmulti-point transmissionjoint transmissionfield experiments
 Summary | Full Text:PDF(4.5MB)

5G Radio Access: Requirements, Concept and Experimental Trials
Takehiro NAKAMURA Anass BENJEBBOUR Yoshihisa KISHIYAMA Satoshi SUYAMA Tetsuro IMAI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2015/08/01
Vol. E98-B  No. 8  pp. 1397-1406
Type of Manuscript:  INVITED PAPER (Special Section on 5G Radio Access Networks―Part I: Radio Access Technologies and System Design)
Category: 
Keyword: 
next generation mobile communications system5G4GLTELTE-advanced
 Summary | Full Text:PDF(3.6MB)

Downlink Non-Orthogonal Multiple Access (NOMA) Combined with Single User MIMO (SU-MIMO)
Anass BENJEBBOUR Anxin LI Keisuke SAITO Yoshihisa KISHIYAMA Takehiro NAKAMURA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2015/08/01
Vol. E98-B  No. 8  pp. 1415-1425
Type of Manuscript:  Special Section PAPER (Special Section on 5G Radio Access Networks―Part I: Radio Access Technologies and System Design)
Category: 
Keyword: 
cellular systemnon-orthogonal multiple accesssuperposition codingMIMOsuccessive interference cancellation
 Summary | Full Text:PDF(2.9MB)

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)

System Performance Investigation of Layer-1 and Layer-3 Relays in LTE-Advanced Downlink
Satoshi NAGATA Yuan YAN Anxin LI Xinying GAO Tetsushi ABE Takehiro NAKAMURA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2011/12/01
Vol. E94-B  No. 12  pp. 3296-3303
Type of Manuscript:  Special Section PAPER (Special Section on Cooperative Communications for Cellular Networks)
Category: 
Keyword: 
LTE-advancedOFDMrelaylayer 3scheduling
 Summary | Full Text:PDF(2.1MB)

Field and Indoor Experimental Results of E-UTRA Uplink
Naoto OKUBO Yoshiaki OFUJI Sadayuki ABETA Takehiro NAKAMURA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/05/01
Vol. E92-B  No. 5  pp. 1714-1724
Type of Manuscript:  Special Section PAPER (Special Section on Radio Access Techniques for 3G Evolution)
Category: 
Keyword: 
Evolved UTRA uplinkAMCTPCvariable RB allocation
 Summary | Full Text:PDF(1.7MB)

Experiments on HSDPA Throughput Performance in W-CDMA Systems
Hiroyuki ISHII Tomoki SAO Shinya TANAKA Shinsuke OGAWA Yousuke IIZUKA Takeshi NAKAMORI Takehiro NAKAMURA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/07/01
Vol. E89-A  No. 7  pp. 1903-1912
Type of Manuscript:  Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks)
Category: 
Keyword: 
HSDPAadvanced receiverBS schedulingTCP throughput
 Summary | Full Text:PDF(2.8MB)