Hiroshi OGUMA

Experimental Evaluation of Synchronized SS-CDMA Transmission Timing Control Method for QZSS Short Message Communication
Suguru KAMEDA Kei OHYA Hiroshi OGUMA Noriharu SUEMATSU 
Publication:   
Publication Date: 2019/08/01
Vol. E102-B  No. 8  pp. 1781-1790
Type of Manuscript:  PAPER
Category: Satellite Communications
Keyword: 
SS-CDMA, QZSS, GPS, timing synchronization, satellite communication, 
 Summary | Full Text:PDF
Random Access Control Scheme with Reservation Channel for Capacity Expansion of QZSS Safety Confirmation System
Suguru KAMEDA Kei OHYA Tomohide TAKAHASHI Hiroshi OGUMA Noriharu SUEMATSU 
Publication:   
Publication Date: 2019/01/01
Vol. E102-A  No. 1  pp. 186-194
Type of Manuscript:  Special Section PAPER (Special Section on Wideband Systems)
Category: 
Keyword: 
Quasi-Zenith Satellite System (QZSS), Global Positioning System (GPS), access control, frame slotted ALOHA, flag method, 1-bit flag, synchronized spread spectrum code division multiple access (synchronized SS-CDMA), 
 Summary | Full Text:PDF
Measured Downlink Throughput Performance of MBWA System in Urban Area
Suguru KAMEDA Hiroshi OGUMA Noboru IZUKA Yasuyoshi ASANO Yoshiharu YAMAZAKI Noriharu SUEMATSU Tadashi TAKAGI Kazuo TSUBOUCHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2013/01/01
Vol. E96-B  No. 1  pp. 329-334
Type of Manuscript:  LETTER
Category: Wireless Communication Technologies
Keyword: 
MBWA, FH-OFDMA, FLASH-OFDM, field trial, 
 Summary | Full Text:PDF
Proposal of Heterogeneous Wireless Network with Handover in Application Layer: Feasibility Study Based on Field Trial Results
Suguru KAMEDA Hiroshi OGUMA Noboru IZUKA Fumihiro YAMAGATA Yasuyoshi ASANO Yoshiharu YAMAZAKI Shoichi TANIFUJI Noriharu SUEMATSU Tadashi TAKAGI Kazuo TSUBOUCHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/04/01
Vol. E95-B  No. 4  pp. 1152-1160
Type of Manuscript:  Special Section PAPER (Special Section on Cognitive Radio and Heterogeneous Wireless Networks in Conjunction with Main Topics of CrownCom2011)
Category: 
Keyword: 
heterogeneous wireless networks, WLAN, MBWA, handover, 
 Summary | Full Text:PDF