Akihiro Okazaki

According to our database, Akihiro Okazaki authored at least 43 papers between 1993 and 2024.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of three.

2024

Heartbeat Interval Estimation Method Using Sub-Terahertz Sensing.

Shusaku Umeda, Kazuaki Ishioka, Kota Nakamura, Michiya Hayama, Akinori Taira, Akihiro Okazaki

Proceedings of the 21st IEEE Consumer Communications & Networking Conference, 2024

2023

Experimental Trials on Sidelink Multi-hop Communications.

Manabu Sakai, Kazuma Obigane, Hiroshi Nishimoto, Akihiro Okazaki, Masaki Noda

Proceedings of the 97th IEEE Vehicular Technology Conference, 2023

2020

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

IEEE Trans. Wirel. Commun., 2020

2019

An Equalization of PN-DSTBC for Concatenating with Spectral Precoding.

Kanako Yamaguchi, Nicolas Gresset, Hiroshi Nishimoto, Akihiro Okazaki, Hiroyasu Sano, Shusaku Umeda, Kaoru Tsukamoto, Atsushi Okamura

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2019

5G R&D Achievements for High-Data-Rate and Low-Power-Consumption Radio Access Technologies with Higher-Frequency-Band and Wider-Bandwidth Massive MIMO.

Yukihiko Okumura, Satoshi Suyama, Naoto Ishii, Yasushi Maruta, Akihiro Okazaki, Atsushi Okamura, Jun Terada, Takeshi Onizawa

Proceedings of the 89th IEEE Vehicular Technology Conference, 2019

2018

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

IEEE Commun. Stand. Mag., 2018

Indoor Experimental Trial on Hybrid 16-Beam Spatial-Multiplexing for High SHF Wide-Band Massive MIMO in 5G.

Manabu Sakai, Kenji Nakagawa, Hiroki Iura, Naofumi Iwayama, Akihiro Okazaki, Nobuhide Nonaka, Satoshi Suyama, Jun Mashino, Atsushi Okamura, Yukihiko Okumura

Proceedings of the 88th IEEE Vehicular Technology Conference, 2018

Non-Linear Precoding for 5G NR.

Fumihiro Hasegawa, Hiroshi Nishimoto, Nuan Song, Mihail Enescu, Akinori Taira, Akihiro Okazaki, Atsushi Okamura

Proceedings of the 2018 IEEE Conference on Standards for Communications and Networking, 2018

2017

Performance Evaluation of NL-BMD Precoding over Analog-Digital Hybrid Beamforming for High SHF Wide-Band Massive MIMO in 5G.

Hiroshi Nishimoto, Akinori Taira, Hiroki Iura, Shigeru Uchida, Akihiro Okazaki, Atsushi Okamura

Int. J. Wirel. Inf. Networks, 2017

NL-BMD: Nonlinear Block Multi-Diagonalization Precoding for High SHF Wide-Band Massive MIMO in 5G.

Hiroshi Nishimoto, Akinori Taira, Hiroki Iura, Shigeru Uchida, Akihiro Okazaki, Atsushi Okamura

IEICE Trans. Commun., 2017

A Compact RF Frontend Module of Active Phased Array Antenna for High SHF Wideband Massive MIMO in 5G.

Hideyuki Nakamizo, Shintaro Shinjo, Koji Tsutsumi, Satoshi Yamaguchi, Hideharu Yoshioka, Akihiro Okazaki, Akinori Taira, Kenichi Tajima

IEICE Trans. Electron., 2017

Static sequence wrapped DFT-s-OFDM for high-speed train scenarios in high-SHF bands.

Fumihiro Hasegawa, Hiroshi Nishimoto, Akihiro Okazaki, Atsushi Okamura

Proceedings of the 2017 European Conference on Networks and Communications, 2017

3GPP standardization activities in relay based 5G high speed train scenarios for the SHF band.

Fumihiro Hasegawa, Akinori Taira, Hiroshi Nishimoto, Akihiro Okazaki, Atsushi Okamura, Gosan Noh, Bing Hui, Junhwan Lee, Ilgyu Kim

Proceedings of the IEEE Conference on Standards for Communications and Networking, 2017

2016

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

IEICE Trans. Commun., 2016

Block lower multi-diagonalization for multiuser MIMO downlink.

Hiroshi Nishimoto, Hiroki Iura, Akinori Taira, Akihiro Okazaki, Atsushi Okamura

Proceedings of the IEEE Wireless Communications and Networking Conference, 2016

Nonlinear block multi-diagonalization precoding for high SHF wide-band massive MIMO in 5G.

Hiroshi Nishimoto, Akinori Taira, Hiroki Iura, Shigeru Uchida, Akihiro Okazaki, Atsushi Okamura

Proceedings of the 27th IEEE Annual International Symposium on Personal, 2016

Two-dimensional diversity with serial concatenation of spectral precoding and DSTBC.

Kanako Yamaguchi, Nicolas Gresset, Hiroshi Nishimoto, Akihiro Okazaki, Shusaku Umeda, Kaoru Tsukamoto, Hiroyasu Sano, Atsushi Okamura

Proceedings of the 2016 International Symposium on Information Theory and Its Applications, 2016

2015

Novel Dynamic and Static Methods for Out-of-Band Power Suppression in SC-OFDM.

Fumihiro Hasegawa, Akihiro Okazaki, Atsushi Okamura, Damien Castelain, Cristina Ciochina-Duchesne, Loïc Brunel, David Mottier

IEEE Wirel. Commun. Lett., 2015

Cell Structure for High-Speed Land-Mobile Communications.

Shusaku Umeda, Akihiro Okazaki, Hiroshi Nishimoto, Kaoru Tsukamoto, Kanako Yamaguchi, Atsushi Okamura

Proceedings of the IEEE 82nd Vehicular Technology Conference, 2015

Static sequence assisted out-of-band power suppression for DFT-s-OFDM.

Fumihiro Hasegawa, Shintaro Shinjo, Akihiro Okazaki, Atsushi Okamura, Loïc Brunel, David Mottier

Proceedings of the 26th IEEE Annual International Symposium on Personal, 2015

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

Proceedings of the 2015 IEEE Globecom Workshops, San Diego, CA, USA, December 6-10, 2015, 2015

R&D activities for 5G in IEICE technical committee on radio communication systems.

Hidekazu Murata, Eiji Okamoto, Manabu Mikami, Akihiro Okazaki, Satoshi Suyama, Takamichi Inoue, Jun Mashino, Tetsuya Yamamoto, Makoto Taromaru

Proceedings of the 21st Asia-Pacific Conference on Communications, 2015

2014

Phase-Anchored SC-OFDM.

Fumihiro Hasegawa, Masatsugu Higashinaka, Akihiro Okazaki, Fumio Ishizu, Damien Castelain, Loïc Brunel, David Mottier

IEEE Wirel. Commun. Lett., 2014

2012

Non-coherent MIMO Communication Systems Employing per Transmit Antenna Differential Mapping (PADM).

Hiroshi Kubo, Masatsugu Higashinaka, Akihiro Okazaki

IEICE Trans. Commun., 2012

A Novel PAPR Reduction Scheme for SC-OFDM with Frequency Domain Multiplexed Pilots.

Fumihiro Hasegawa, Akihiro Okazaki, Hiroshi Kubo, Damien Castelain, David Mottier

IEEE Commun. Lett., 2012

Channel estimation technique for OFDM systems spread by chirp sequences.

Keisuke Ozaki, Koji Tomitsuka, Akihiro Okazaki, Hiroyasu Sano, Hiroshi Kubo

Proceedings of the 23rd IEEE International Symposium on Personal, 2012

2011

Transmission Performance of Space Time Block Coding with Grouped Phase Rotation for Asymmetric MIMO-OFDM System.

Akinori Nakajima, Kenichiro Tanaka, Akinori Ohashi, Hiroshi Hattori, Akihiro Okazaki, Hiroshi Kubo

IEICE Trans. Commun., 2011

Peak power reduction techniques for multi-channel SC-OFDM.

Fumihiro Hasegawa, Akihiro Okazaki, Hiroshi Kubo

Proceedings of the IEEE 22nd International Symposium on Personal, 2011

Super-Resolution Blind Channel Modeling.

Man-On Pun, Andreas F. Molisch, Philip V. Orlik, Akihiro Okazaki

Proceedings of IEEE International Conference on Communications, 2011

2010

Low complexity frame synchronization methods for fading channels.

Fumihiro Hasegawa, Hiroyasu Sano, Akihiro Okazaki, Hiroshi Kubo

Proceedings of the IEEE 21st International Symposium on Personal, 2010

2008

Likelihood Estimation for Reduced-Complexity ML Detectors in a MIMO Spatial-Multiplexing System.

Masatsugu Higashinaka, Katsuyuki Motoyoshi, Akihiro Okazaki, Takayuki Nagayasu, Hiroshi Kubo, Akihiro Shibuya

IEICE Trans. Commun., 2008

Soft Decision Directed Channel Estimation with Interference Cancellation for a MIMO System Using Iterative Equalization and Decoding.

Masatsugu Higashinaka, Hiroshi Kubo, Akihiro Okazaki, Yasutaka Ogawa, Takeo Ohgane, Toshihiko Nishimura

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008

Channel estimation with interference cancellation for a MIMO receiver using iterative equalization and decoding.

Masatsugu Higashinaka, Hiroshi Kubo, Akihiro Okazaki

Proceedings of the IEEE 19th International Symposium on Personal, 2008

2007

Channel Quality Indicator Estimation for OFDMA Systems in the Downlink.

Abdel-Majid Mourad, Loïc Brunel, Akihiro Okazaki, Umer Salim

Proceedings of the 65th IEEE Vehicular Technology Conference, 2007

Likelihood Estimation for Reduced-Complexity ML Detectors in a MIMO System.

Masatsugu Higashinaka, Katsuyuki Motoyoshi, Takayuki Nagayasu, Hiroshi Kubo, Akihiro Shibuya, Akihiro Okazaki

Proceedings of the 65th IEEE Vehicular Technology Conference, 2007

Capacity Evaluation of MIMO-OFDM Systems using Reduced-Complexity ML Detectors in a Spatially Correlated Channel.

Masatsugu Higashinaka, Katsuyuki Motoyoshi, Takayuki Nagayasu, Hiroshi Kubo, Akihiro Shibuya, Akihiro Okazaki

Proceedings of the IEEE 18th International Symposium on Personal, 2007

2006

Frequency-Domain Equalization Incorporated with Frequency-Domain Redundancy for OFDM Systems.

Akihiro Okazaki, Katsuyuki Motoyoshi, Masatsugu Higashinaka, Takayuki Nagayasu, Hiroshi Kubo, Akihiro Shibuya

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2006

A Co-channel Interference Cancellation Method Using Low Dimensional Sphere Decoding for MIMO Communication Systems.

Masatsugu Higashinaka, Akihiro Okazaki, Katsuyuki Motoyoshi, Takayuki Nagayasu, Hiroshi Kubo, Akihiro Shibuya

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2006

2005

A Multiple-Symbol Differential Detection Based on Channel Prediction for Fast Time-Varying Fading.

Hiroshi Kubo, Akihiro Okazaki, Kazuo Tanada, Bertrand Penther, Keishi Murakami

IEICE Trans. Commun., 2005

Performance Improvement for MIMO Communication Systems Employing Per Transmit Antenna Differential Encoding (PADE).

Hiroshi Kubo, Masatsugu Higashinaka, Akihiro Okazaki, Keishi Murakami

Proceedings of the IEEE 16th International Symposium on Personal, 2005

2001

Experimental evaluation of a parallel blind demodulator combined with a Reed-Solomon decoder in the presence of intersymbol interference.

Kazuo Tanada, Hiroshi Kubo, Akihiro Okazaki, Takeshi Uraguchi, Shuichi Hayashi, Hisashi Ishikawa, Atsushi Iwase, Jun Taniguchi

Proceedings of the 54th IEEE Vehicular Technology Conference, 2001

A parallel blind demodulator in the presence of intersymbol interference.

Hiroshi Kubo, Akihiro Okazaki, Kazuo Tanada, Bertrand Penther, Makoto Miyake

Proceedings of the IEEE International Conference on Communications, 2001

1993

Distributed file management techniques based on an autonomous decentralized system concept.

Masayuki Orimo, Sigeki Hirasawa, Akihiro Okazaki, Hirosi Fujise, Masuyuki Takeuchi, Kinji Mori

Comput. Commun., 1993