Akihiro Okazaki
Mitsubishi Electric
91 Papers
418 Citations
Akihiro Okazaki is an academic researcher from Mitsubishi Electric. The author has contributed to research in topics: MIMO & Communication channel. The author has an hindex of 11, co-authored 91 publications. Previous affiliations of Akihiro Okazaki include Mitsubishi.
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Papers
High-Speed Train Communications Standardization in 3GPP 5G NR
Fumihiro Hasegawa,Akinori Taira,Gosan Noh,Bing Hui,Hiroshi Nishimoto,Akihiro Okazaki,Atsushi Okamura,Junhwan Lee,Ilgyu Kim +8 more
- 11 Apr 2018
TL;DR: The architectures and applications of 5G network slicing to HST are described, and both higher layer and physical layer technologies are proposed to improve the quality of train communication in a 5G system.
84
Experimental Field Trials on MU-MIMO Transmissions for High SHF Wide-Band Massive MIMO in 5G
Manabu Sakai,Kenichiro Kamohara,Hiroki Iura,Hiroshi Nishimoto,Kazuaki Ishioka,Yoshitaka Murata,Masayuki Yamamoto,Akihiro Okazaki,Nobuhide Nonaka,Satoshi Suyama,Jun Mashino,Atsushi Okamura,Yukihiko Okumura +12 more
TL;DR: The field trial results show that digital precoding improves the system performance and that over 20 Gbps total throughput can be achieved for a variety of user distributions.
42
Non-Linear Precoding for 5G NR
Fumihiro Hasegawa,Hiroshi Nishimoto,Nuan Song,Mihail Enescu,Akinori Taira,Akihiro Okazaki,Atsushi Okamura +6 more
- 01 Oct 2018
TL;DR: Implementation, performance evaluation of nonlinear precoding and analysis of 3GPP specification impact are presented, and simulation results demonstrate that the proposed methods outperform linear precoding techniques and offer a tradeoff between computational complexity and throughput performance.
25
Performance Evaluation of 44GHz Band Massive MIMO Based on Channel Measurement
Akinori Taira,Hiroki Iura,Kenji Nakagawa,Shigeru Uchida,Kazuaki Ishioka,Akihiro Okazaki,Satoshi Suyama,Tatsunori Obara,Yukihiko Okumura,Atsushi Okamura +9 more
- 01 Dec 2015
TL;DR: Channel capacity evaluation with 44GHz-band APAA measurement results will be carried out and the possibility of large capacity transmission in LOS environment is shown and transmit performance results using cluster model are presented.
23
Radio Access Technologies for Fifth Generation Mobile Communications System: Review of Recent Research and Developments in Japan
Hidekazu Murata,Eiji Okamoto,Manabu Mikami,Akihiro Okazaki,Satoshi Suyama,Takamichi Inoue,Jun Mashino,Tetsuya Yamamoto,Makoto Taromaru +8 more
TL;DR: This paper focuses on providing a comprehensive survey of research and development activities on fifth generation mobile communication systems in Japan, and tries to survey a vast area of wireless communication systems and the developments that led to future 5G systems.