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IEICE Trans

Takanori SATO

Strategies for DOA-DNN Estimation Accuracy Improvement at Low and High SNRs
Daniel Akira ANDO Toshihiko NISHIMURA Takanori SATO Takeo OHGANE Yasutaka OGAWA Junichiro HAGIWARA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2025/01/01
Vol. E108-B  No. 1  pp. 94-108
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
antenna array, DOA estimation, deep neural network, principal component analysis, 
 Summary | Full Text:PDF
Optical Mode Multiplexer Using LiNbO3 Asymmetric Directional Coupler Enabling Voltage Control for Phase-Matching Condition
Shotaro YASUMORI Seiya MORIKAWA Takanori SATO Tadashi KAWAI Akira ENOKIHARA Shinya NAKAJIMA Kouichi AKAHANE 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2024/05/01
Vol. E107-C  No. 5  pp. 146-149
Type of Manuscript:  BRIEF PAPER
Category: Optoelectronics
Keyword: 
optical mode multiplexer, asymmetric directional coupler, LiNbO3 waveguide, phase-matching condition, 
 Summary | Full Text:PDF
Deep Neural Networks Based End-to-End DOA Estimation System
Daniel Akira ANDO Yuya KASE Toshihiko NISHIMURA Takanori SATO Takeo OHGANE Yasutaka OGAWA Junichiro HAGIWARA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2023/12/01
Vol. E106-B  No. 12  pp. 1350-1362
Type of Manuscript:  Special Section PAPER (Special Section on Emerging Communication Technologies in Conjunction with Main Topics of ICETC 2022)
Category: 
Keyword: 
antenna array, DOA estimation, SNR estimation, source number estimation, deep neural network, 
 Summary | Full Text:PDF
Smart Radio Environments with Intelligent Reflecting Surfaces for 6G Sub-Terahertz-Band Communications
Yasutaka OGAWA Shuto TADOKORO Satoshi SUYAMA Masashi IWABUCHI Toshihiko NISHIMURA Takanori SATO Junichiro HAGIWARA Takeo OHGANE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2023/09/01
Vol. E106-B  No. 9  pp. 735-747
Type of Manuscript:  INVITED PAPER (Special Section on Technologies and Proof-of-Concept Activities for 5G Advanced and 6G)
Category: 
Keyword: 
6G mobile communications, sub-Terahertz band, smart radio environment, intelligent reflecting surface, 
 Summary | Full Text:PDF
Sub-Terahertz MIMO Spatial Multiplexing in Indoor Propagation Environments
Yasutaka OGAWA Taichi UTSUNO Toshihiko NISHIMURA Takeo OHGANE Takanori SATO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2022/10/01
Vol. E105-B  No. 10  pp. 1130-1138
Type of Manuscript:  INVITED PAPER (Special Section on Multidisciplinary and Innovative Key technologies in Advanced communication systems (MIKA))
Category: 
Keyword: 
6G, sub-Terahertz band, hybrid MIMO system, spatial multiplexing, channel capacity, beam steering, 
 Summary | Full Text:PDF
Mach-Zehnder Optical Modulator Integrated with Tunable Multimode Interference Coupler of Ti:LiNbO3 Waveguides for Controlling Modulation Extinction Ratio
Anna HIRAI Yuichi MATSUMOTO Takanori SATO Tadashi KAWAI Akira ENOKIHARA Shinya NAKAJIMA Atsushi KANNO Naokatsu YAMAMOTO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2022/08/01
Vol. E105-C  No. 8  pp. 385-388
Type of Manuscript:  BRIEF PAPER
Category: Lasers, Quantum Electronics
Keyword: 
multimode interference (MMI), optical modulator, optical coupler, titanium diffused LiNbO3, tuning, extinction ratio, optical single-sideband (SSB) modulation, 
 Summary | Full Text:PDF
Accuracy Improvement in DOA Estimation with Deep Learning
Yuya KASE Toshihiko NISHIMURA Takeo OHGANE Yasutaka OGAWA Takanori SATO Yoshihisa KISHIYAMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2022/05/01
Vol. E105-B  No. 5  pp. 588-599
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
DOA estimation, deep learning, machine learning, 
 Summary | Full Text:PDF
Electro-Optic Modulator for Compensation of Third-Order Intermodulation Distortion Using Frequency Chirp Modulation
Daichi FURUBAYASHI Yuta KASHIWAGI Takanori SATO Tadashi KAWAI Akira ENOKIHARA Naokatsu YAMAMOTO Tetsuya KAWANISHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2020/11/01
Vol. E103-C  No. 11  pp. 653-660
Type of Manuscript:  Special Section PAPER (Special Section on Opto-electronics and Communications for Future Optical Network)
Category: 
Keyword: 
electro-optic modulator, third-order intermodulation distortion, dual parallel Mach-Zehnder modulator, frequency chirp, rat race circuit, 
 Summary | Full Text:PDF
Detecting Motor Learning-Related fNIRS Activity by Applying Removal of Systemic Interferences
Isao NAMBU Takahiro IMAI Shota SAITO Takanori SATO Yasuhiro WADA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2017/01/01
Vol. E100-D  No. 1  pp. 242-245
Type of Manuscript:  LETTER
Category: Biological Engineering
Keyword: 
fNIRS, brain, motor learning, scalp artifact reduction, 
 Summary | Full Text:PDF
A 1-GHz Portable Digital Delay-Locked Loop with Infinite Phase Capture Ranges
Koichiro MINAMI Masayuki MIZUNO Hiroshi YAMAGUCHI Toshihiko NAKANO Yusuke MATSUSHIMA Yoshikazu SUMI Takanori SATO Hisashi YAMASHIDA Masakazu YAMASHINA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2001/02/01
Vol. E84-C  No. 2  pp. 220-228
Type of Manuscript:  Special Section PAPER (Special Issue on Low-Power High-Performance VLSI Processors and Technologies)
Category: 
Keyword: 
delay-locked loop, infinite phase capture ranges, variable delay line, dynamic phase detector, 
 Summary | Full Text:PDF