Tatsuki OKUYAMA


Performance Evaluation of Downlink Multi-User Massive MIMO with Configurable Active Antenna System and Inter Access Point Coordination in Low-SHF-Band
Yi JIANG Kenichiro YAMAZAKI Toshihiro HAYATA Kohei IZUI Kanada NAKAYASU Toshifumi SATO Tatsuki OKUYAMA Jun MASHINO Satoshi SUYAMA Yukihiko OKUMURA 
Publication:   
Publication Date: 2019/08/01
Vol. E102-B  No. 8  pp. 1401-1410
Type of Manuscript:  Special Section PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G and Beyond)
Category: 
Keyword: 
5GMassive MIMOlow-SHF-bandMU-MIMObeamformingC-RANCBCoMP
 Summary | Full Text:PDF

Performance Evaluation of Low Complexity Digital Beamforming Algorithms by Link-Level Simulations and Outdoor Experimental Trials for 5G Low-SHF-Band Massive MIMO
Tatsuki OKUYAMA Satoshi SUYAMA Jun MASHINO Kazushi MURAOKA Kohei IZUI Kenichiro YAMAZAKI Yukihiko OKUMURA 
Publication:   
Publication Date: 2019/08/01
Vol. E102-B  No. 8  pp. 1382-1389
Type of Manuscript:  Special Section PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G and Beyond)
Category: 
Keyword: 
5GMassive MIMOdigital beamformingoutdoor experimental trialslow SHF bands
 Summary | Full Text:PDF

Experimental Study of Large-Scale Coordinated Multi-User MIMO for 5G Ultra High-Density Distributed Antenna Systems
Takaharu KOBAYASHI Masafumi TSUTSUI Takashi DATEKI Hiroyuki SEKI Morihiko MINOWA Chiyoshi AKIYAMA Tatsuki OKUYAMA Jun MASHINO Satoshi SUYAMA Yukihiko OKUMURA 
Publication:   
Publication Date: 2019/08/01
Vol. E102-B  No. 8  pp. 1390-1400
Type of Manuscript:  Special Section PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G and Beyond)
Category: 
Keyword: 
5Gcell densificationdistributed antenna systemcoordinated multi-user MIMOfield experiment
 Summary | Full Text:PDF

Digital Beamforming Algorithm for 5G Low-SHF Band Massive MIMO
Shohei YOSHIOKA Satoshi SUYAMA Tatsuki OKUYAMA Jun MASHINO Yukihiko OKUMURA 
Publication:   
Publication Date: 2019/08/01
Vol. E102-B  No. 8  pp. 1371-1381
Type of Manuscript:  Special Section PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G and Beyond)
Category: 
Keyword: 
5Glow-SHF bandmassive MIMOmulti-user MIMOfully-digital beamformingintersite coordination
 Summary | Full Text:PDF

Field Trial of 28GHz Band 5G Downlink Massive MIMO Employing Beam Tracking in Railway Environment
Yuta TAKAHASHI Tatsuki OKUYAMA Kazushi MURAOKA Satoshi SUYAMA Jun MASHINO Yukihiko OKUMURA 
Publication:   
Publication Date: 2019/08/01
Vol. E102-B  No. 8  pp. 1411-1417
Type of Manuscript:  Special Section PAPER (Special Section on Technology Trials and Proof-of-Concept Activities for 5G and Beyond)
Category: 
Keyword: 
5Ghigh mobilitymassive MIMObeamformingbeam tracking
 Summary | Full Text:PDF

5G Distributed Massive MIMO with Ultra-High Density Antenna Deployment in Low SHF Bands
Tatsuki OKUYAMA Satoshi SUYAMA Jun MASHINO Yukihiko OKUMURA 
Publication:   
Publication Date: 2017/10/01
Vol. E100-B  No. 10  pp. 1921-1927
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
5Gultra-high densitydistributed massive MIMOvirtual cellflexible antenna deploymentlow SHF bands
 Summary | Full Text:PDF

Experimental Trial of 5G Super Wideband Wireless Systems Using Massive MIMO Beamforming and Beam Tracking Control in 28GHz Band
Tatsunori OBARA Tatsuki OKUYAMA Yuki INOUE Yuuichi AOKI Satoshi SUYAMA Jaekon LEE Yukihiko OKUMURA 
Publication:   
Publication Date: 2017/08/01
Vol. E100-B  No. 8  pp. 1256-1268
Type of Manuscript:  Special Section PAPER (Special Section on Radio Access Technologies for 5G Mobile Communications System)
Category: Wireless Communication Technologies
Keyword: 
5Ghigher frequency bandsmassive MIMObeamformingspatial multiplexingbeam tracking
 Summary | Full Text:PDF