Nobuhide NONAKA

PAPR Reduction of OFDM Signals Using Null Space in MIMO Channel for MIMO Amplify-and-Forward Relay Transmission
Yuki SEKIGUCHI Nobuhide NONAKA Kenichi HIGUCHI 
Publication:   
Publication Date: 2022/09/01
Vol. E105-B  No. 9  pp. 1078-1086
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
OFDM, PAPR, MIMO, null space, relaying, amplify-and-forward, 
 Summary | Full Text:PDF(1.9MB)
28 GHz-Band Experimental Trial Using the Shinkansen in Ultra High-Mobility Environment for 5G Evolution
Nobuhide NONAKA Kazushi MURAOKA Tatsuki OKUYAMA Satoshi SUYAMA Yukihiko OKUMURA Takahiro ASAI Yoshihiro MATSUMURA 
Publication:   
Publication Date: 2021/09/01
Vol. E104-B  No. 9  pp. 1000-1008
Type of Manuscript:  Special Section PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G Evolution and Beyond)
Category: 
Keyword: 
5G evolution, massive MIMO, ultra high-mobility, high speed train, 28GHz band, 
 Summary | Full Text:PDF(4.5MB)
Base Station Cooperation Technologies Using 28GHz-Band Digital Beamforming in High-Mobility Environments
Tatsuki OKUYAMA Nobuhide NONAKA Satoshi SUYAMA Yukihiko OKUMURA Takahiro ASAI 
Publication:   
Publication Date: 2021/09/01
Vol. E104-B  No. 9  pp. 1009-1016
Type of Manuscript:  Special Section PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G Evolution and Beyond)
Category: 
Keyword: 
5G evolution, millimeter-wave, high-mobility environment, digital BF, BS cooperation technology, 
 Summary | Full Text:PDF(3.1MB)
Two-Step User Selection Algorithm in Multi-User Massive MIMO with Hybrid Beamforming for 5G Evolution
Nobuhide NONAKA Satoshi SUYAMA Tatsuki OKUYAMA Kazushi MURAOKA Yukihiko OKUMURA 
Publication:   
Publication Date: 2021/09/01
Vol. E104-B  No. 9  pp. 1089-1096
Type of Manuscript:  Special Section PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G Evolution and Beyond)
Category: 
Keyword: 
5G, massive-MIMO, multi-user MIMO, hybrid beamforming, low-complexity, 
 Summary | Full Text:PDF(1.3MB)
Base Station Cooperative Multiuser MIMO Using Block-Diagonalized Random Beamforming with Online Update
Nobuhide NONAKA Anass BENJEBBOUR Kenichi HIGUCHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2015/08/01
Vol. E98-B  No. 8  pp. 1622-1629
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
multiuser MIMO, base station cooperation, beamforming, precoding, random beamforming, 
 Summary | Full Text:PDF(2.1MB)
Non-Orthogonal Multiple Access Using Intra-Beam Superposition Coding and SIC in Base Station Cooperative MIMO Cellular Downlink
Nobuhide NONAKA Yoshihisa KISHIYAMA Kenichi HIGUCHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2015/08/01
Vol. E98-B  No. 8  pp. 1651-1659
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
non-orthogonal multiple access, superposition coding, successive interference cancellation, downlink, MIMO, base station cooperation, 
 Summary | Full Text:PDF(1.9MB)