Japanese Journal of Applied Physics 62(SJ) SJ8003-SJ8003 Feb 2023
Abstract
This paper proposes a high-sensitive measuring method for nonlinear harmonic responses in radio frequency (RF) SAW/BAW devices using a lock-in amplifier. The proposed system could detect the nonlinear complex harmonic responses generate...
Tomoaki Mashiko Koki Takano Akira Kaino Sou Kuromasa Shintaro Fujii Tatsuya Omori Masatoshi Sakai Kazuhiro Kudo Hirofumi Mino
Physica Status Solidi (A) Applications and Materials Science 2023
Herein, a time-resolved electrical measurement is developed to observe the transient impedance of organic photovoltaics (OPV) and traced the initial photocarrier generation dynamics with the time region from 10 ns to 190 μs. A light-triggered time...
Jaroslav Chum Tereza Šindelářová Petra Koucká Knížová Kateřina Podolská Jan Rusz Jiří Baše Hiroyuki Nakata Keisuke Hosokawa Michael Danielides Carsten Schmidt Leon Knez Jann-Yenq Liu María Graciela Molina Mariano Fagre Zama Katamzi-Joseph Hiroyo Ohya Tatsuya Omori Jan Laštovička Dalia Obrazová Burešová Daniel Kouba Jaroslav Urbář Vladimír Truhlík
Geophysical Journal International 233(2) 1429-1443 Dec 2022
SUMMARY
The massive explosive eruption of the Hunga volcano on 15 January 2022 generated atmospheric waves that were recorded around the globe and affected the ionosphere. The paper focuses on observations of atmospheric waves in the troposphere...
Fumiaki Ukaji Chang Jun Ahn Tatsuya Omori Ken Ya Hashimoto
Proceedings of the IEEE International Conference on Industrial Technology 2016-May 860-865 May 2016
Multi-user multi-input multi-output (MU-MIMO) can achieve more transmission speed and multi-user diversity. Furthermore, since frequency symbol spreading (FSS) can mitigate the effect of frequency selective fading, it is useful for improving the B...
Masaya Okamura Chang Jun Ahn Tatsuya Omori Ken Ya Hashimoto
2015 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2015 532-536 Mar 2016
Massive MIMO has been recognized as promising ways to provide high speed data transmission. However, since the number of pilot symbol is proportionally depending on the number of transmit antenna, the total transmission rate of massive MIMO would ...
Kotaro Abe Chang Jun Ahn Tatsuya Omori Ken Ya Hashimoto
2015 International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2015 417-421 Mar 2016
Recently, visible light communication(VLC) is widely researched due to the spreading of LED usage. It satisfies demands of ubiquity and high speed communication. However, it is impossible to transmit the phase information and frequency information...
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