Keyword : multibeam

Fast-Converging Constant Modulus Algorithm with Variable Step Size for Multibeam Massive MIMO
Kentaro NISHIMORI Kazuki MARUTA Takefumi HIRAGURI Hidehisa SHIOMI 
Publication:   
Publication Date: 2022/10/01
Vol. E105-B  No. 10 ; pp. 1154-1161
Type of Manuscript:  Special Section PAPER (Special Section on Multidisciplinary and Innovative Key technologies in Advanced communication systems (MIKA))
Category: 
Keyword: 
constant modulus, blind algorithm, variable step size, multibeam, massive MIMO, QAM, 
 Summary | Full Text:PDF(5.6MB)
Development of Superconducting Devices Supporting Radio Astronomy
Yoshinori UZAWA Matthias KROUG Takafumi KOJIMA Masanori TAKEDA Kazumasa MAKISE Shohei EZAKI Wenlei SHAN Akihira MIYACHI Yasunori FUJII Hirotaka TERAI 
Publication:   
Publication Date: 2021/09/01
Vol. E104-C  No. 9 ; pp. 411-421
Type of Manuscript:  INVITED PAPER (Special Section on Fabrication of Superconductor Devices; Key Technology in Superconductor Electronics)
Category: 
Keyword: 
radio astronomy, SIS mixers, ALMA Band 10, wideband, multibeam, 
 Summary | Full Text:PDF(2MB)
A Pattern Synthesis Method for Multibeam Reflector Antennas
Hiroki SHOKI Kazuaki KAWABATA Tasuku MOROOKA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1994/01/25
Vol. E77-B  No. 1 ; pp. 64-72
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
antenna, multibeam, reflector, pattern synthesis, cluster feed, 
 Summary | Full Text:PDF(742.5KB)
A Multiple Shaped Beam Antenna Using a Single Shaped Reflector
Hiroki SHOKI Kazuaki KAWABATA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1993/12/25
Vol. E76-B  No. 12 ; pp. 1500-1507
Type of Manuscript:  Special Section PAPER (Special Issue on 1992 Internatioal Symposium on Antennas and Propagation)
Category: 
Keyword: 
antenna, multibeam, shaped beam, shaped reflector, 
 Summary | Full Text:PDF(583.5KB)