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IEICE Trans

Hiroaki NAKABAYASHI

Planar Frequency Dispersive Phase Shifter for Multiband Base Station Antennas
Toshiki SOMA Yasuhito YANAGISAWA Keizo CHO Naobumi MICHISHITA Ichiro OSHIMA Hiroaki NAKABAYASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2025/07/01
Vol. E108-B  No. 7  pp. 796-810
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
phase shifter, CRLH-TL, metamaterial, base station antenna, intercell interference reduction, 
 Summary | Full Text:PDF
Path Loss Prediction Method Merged Conventional Models Effectively in Machine Learning for Mobile Communications
Hiroaki NAKABAYASHI Kiyoaki ITOI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2022/06/01
Vol. E105-B  No. 6  pp. 737-747
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2020)
Category: Propagation
Keyword: 
path loss prediction, propagation model, machine learning, fully connected neural network, merged conventional models, 
 Summary | Full Text:PDF
MU-MIMO Channel Model with User Parameters and Correlation between Channel Matrix Elements in Small Area of Multipath Environment
Shigeru KOZONO Yuya TASHIRO Yuuki KANEMIYO Hiroaki NAKABAYASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2020/12/01
Vol. E103-B  No. 12  pp. 1421-1431
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
MU-MIMO channel model, correlation between users, movement factor, user parameter, 5th mobile generation, 
 Summary | Full Text:PDF
Massive MIMO Antenna Arrangement Considering Spatial Efficiency and Correlation between Antennas in Mobile Communications
Kiyoaki ITOI Masanao SASAKI Hiroaki NAKABAYASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2020/05/01
Vol. E103-B  No. 5  pp. 570-581
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
massive MIMO, mathematical optimization, channel response, correlation coefficient, ray-tracing, 
 Summary | Full Text:PDF
Validation of Equivalent Received Bandwidth to Characterize Received Signal Level Distribution through Experiment and Simulation
Hiroaki NAKABAYASHI Jiang YAN Hironari MASUI Masanori ISHII Kozo SAKAWA Hiroyuki SHIMIZU Takehiko KOBAYASHI Shigeru KOZONO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2001/09/01
Vol. E84-B  No. 9  pp. 2550-2559
Type of Manuscript:  Special Section PAPER (Special Issue on Innovation in Antennas and Propagation for Expanding Radio Systems)
Category: Propagation
Keyword: 
mobile propagation, received signal level distribution, delay profile, equivalent received bandwidth, power ratio, 
 Summary | Full Text:PDF