Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Takamitsu Aiba"'
Autor:
Takuya MATSUDA, Yuzuki ENDO, Takamitsu AIBA, Masahiro KANEKO, Yohei MICHITSUJI, Masuhisa TANIMOTO
Publikováno v:
Nihon Kikai Gakkai ronbunshu, Vol 90, Iss 935, Pp 24-00055-24-00055 (2024)
In recent years, condition monitoring technologies have been widely developed aiming at safer railway operation and maintenance cost reduction. Condition monitoring systems of railway for both from onboard and on track have been widely studied thanks
Externí odkaz:
https://doaj.org/article/60a9e4ce191c4514a15a0a69a1dfb714
Publikováno v:
IEEE Photonics Journal, Vol 11, Iss 6, Pp 1-12 (2019)
We present a simultaneous radio-frequency (RF) and high-speed baseband signal transmission using an electrically superimposed method over a graded-index silica multimode fiber (GI-MMF). To show the feasibility of the method, we experimentally demonst
Externí odkaz:
https://doaj.org/article/bd9515615b2a491980ba17f1f443d97d
Autor:
Takamitsu Aiba, Satoshi Tanaka, Hsuan-Yun Kao, Kazuki Tanaka, Toshinori Suzuki, Shota Ishimura, Tetsuya Kawanishi, Hiroki Yasuda, Tomohiro Wakabayashi, Kosuke Nishimura
Publikováno v:
Journal of Lightwave Technology. 39:7716-7725
Millimeter-wave band signals have the advantage of a high capacity and have been used in fifth-generation (5G) mobile services. An analog radio over multi-mode fiber (A-RoMMF) employing a directly modulated vertical cavity surface emitting laser is a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c32f99a09a29134821d274ddd3be5d06
https://doi.org/10.1109/jlt.2021.3103500
https://doi.org/10.1109/jlt.2021.3103500
Autor:
Hiroki Yasuda, Toshinori Suzuki, Satoshi Tanaka, Takamitsu Aiba, Tomohiro Wakabayashi, Tetsuya Kawanishi
Publikováno v:
2022 27th OptoElectronics and Communications Conference (OECC) and 2022 International Conference on Photonics in Switching and Computing (PSC).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac75074adf8dbf32a001a4377d9fb5a9
https://doi.org/10.23919/oecc/psc53152.2022.9849714
https://doi.org/10.23919/oecc/psc53152.2022.9849714
Autor:
Naokatsu Yamamoto, Tetsuya Kawanishi, Tomohiro Wakabayashi, Hiroki Yasuda, Takamitsu Aiba, Atsushi Kanno, Keizo Inagaki
Publikováno v:
Radio Science
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78f0bce0a42718d6aac4a152695f4d5e
Autor:
Kosuke Nishimura, Ryo Inohara, Tomohiro Wakabayashi, Hsuan-Yun Kao, Takamitsu Aiba, Tetsuya Kawanishi, Kazuki Tanaka, Shota Ishimura, Hiroki Yasuda
Publikováno v:
ECOC
An end-to-end mobile fronthaul system based on hybrid IFoF and analogue Radio-over-fibre/Radio-over-multi-mode-fibre (RoF/RoMMF) links is demonstrated for the first time. With the capacity of 25.65 Gbps, the transmission link complies the required pe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3efcd091aaa06bdb85645d2a9993f7ef
https://doi.org/10.1109/ecoc48923.2020.9333365
https://doi.org/10.1109/ecoc48923.2020.9333365
Publikováno v:
2020 International Topical Meeting on Microwave Photonics (MWP).
We have designed simplified drive circuit for directly modulated VCSEL in the optical transmitter for 28 GHz band RF signal, and evaluated transmission characteristics such as transmission loss, reflection and error vector magnitude (EVM).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::157caef391e7f77f0e100929016297f7
https://doi.org/10.23919/mwp48676.2020.9314480
https://doi.org/10.23919/mwp48676.2020.9314480
Autor:
Takamitsu Aiba, Tetsuya Kawanishi, Tomohiro Wakabayashi, Hiroki Yasuda, Hsuan-Yun Kao, Kazuki Tanaka, Kosuke Nishimura, Shota Ishimura
Publikováno v:
2020 International Topical Meeting on Microwave Photonics (MWP).
We evaluate and demonstrate radio over fiber (RoF) signal distribution, which employs cost efficient analog radio over multi-mode fiber (A-RoMMF) sub-system with directly modulated single mode vertical cavity surface emitting laser (VCSEL) and multi-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c2fdf9a2cc94818f407524cf5e774b70
https://doi.org/10.23919/mwp48676.2020.9314446
https://doi.org/10.23919/mwp48676.2020.9314446
Publikováno v:
IEEE Photonics Journal, Vol 11, Iss 6, Pp 1-12 (2019)
We present a simultaneous radio-frequency (RF) and high-speed baseband signal transmission using an electrically superimposed method over a graded-index silica multimode fiber (GI-MMF). To show the feasibility of the method, we experimentally demonst
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0190d9af09d729daf773efb85a143032
https://ieeexplore.ieee.org/document/8918339/
https://ieeexplore.ieee.org/document/8918339/
Autor:
Satoshi Tanaka, Naokatsu Yamamoto, Hiroki Yasuda, Toshinori Suzuki, Takamitsu Aiba, Tetsuya Kawanishi, Tomohiro Wakabayashi, Atsushi Kanno
Publikováno v:
OECC/PSC
We have evaluated effect of the length of the wire bond to the 28 GHz radio frequency signal transmission characteristics and frequency response of the radio over multi-mode fiber.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1375f7074e4bab27d3e5ff53c8ddf8ed
https://doi.org/10.23919/ps.2019.8817826
https://doi.org/10.23919/ps.2019.8817826