Zobrazeno 1 - 10
of 57
pro vyhledávání: '"Yoshisada Koyama"'
Autor:
Alberto Carrasco-Casado, Hideki Takenaka, Yoshisada Koyama, Morio Toyoshima, Hiroo Kunimori, Yoshihiko Saito, Yasushi Munemasa, Koichi Shiratama, Dimitar Kolev, Toshihiro Kubooka
Publikováno v:
International Conference on Space Optics — ICSO 2018.
In recent years, the necessity of satellite-to-ground optical communication has increased as a method for realizing higher-speed communications between satellites and the ground. However, one disadvantage of free-space optical (FSO) communication is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5ebe529446fc72611539c66f4a813931
https://doi.org/10.1117/12.2536127
https://doi.org/10.1117/12.2536127
Autor:
Kenji Suzuki, T. Phuc, Dimitar Kolev, Hiroo Kunimori, Toshihiro Kubooka, Yoshisada Koyama, Koichi Shiratama, Hideki Takenaka, M. Toyoshima, Yasushi Munemasa, A. Carrasco Casado
Publikováno v:
International Conference on Space Optics — ICSO 2018.
In National Institute of Information and Communications Technology (NICT) of JAPAN, an ultra high speed optical satellite communication equipment onboard the engineering test satellite IX has been developing. The satellite is planned to be launched t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4b7c4bccb9fba6d8c3928fff04ca3d13
https://doi.org/10.1117/12.2536135
https://doi.org/10.1117/12.2536135
Autor:
Kenji Suzuki, Morio Toyoshima, Hideki Takenaka, Yoshihiko Saito, Phuc V. Trinh, Hiroo Kunimori, Toshihiro Kubooka, Alberto Carrasco-Casado, Yoshisada Koyama, Dimitar Kolev, Yasushi Munemasa
Publikováno v:
2018 Progress in Electromagnetics Research Symposium (PIERS-Toyama).
National Institute of Information and Communications Technology (NICT)has initiated several R&D projects related to satellite laser communications. In this paper we present some of the recent activities in the field, including the Small Optical TrAns
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a255388bf5f3173ec22d2baefe9478f8
https://doi.org/10.23919/piers.2018.8597762
https://doi.org/10.23919/piers.2018.8597762
Autor:
Yoshihiko Saito, Morio Toyoshima, Hiroo Kunimori, Hideki Takenaka, Phuc V. Trinh, Dimitar Kolev, Yasushi Munemasa, Tetsuharu Fuse, Alberto Carrasco-Casado, Kenji Suzuki, Toshihiro Kubooka, Yoshisada Koyama
Publikováno v:
Free-Space Laser Communication and Atmospheric Propagation XXX.
Recently, satellite broadband communication services using Ka-band are emerging all over the world, some of them with capacities in excess of 100 Gbps. However, as the radio bandwidth resources become exhausted, high-speed optical communication can b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::38e4171bf608a0cce9d00d707e60de5e
https://doi.org/10.1117/12.2291881
https://doi.org/10.1117/12.2291881
Autor:
Dimitar Kolev, Kenji Suzuki, Hideki Takenaka, Hiroo Kunimori, Alberto Carrasco-Casado, Yoshisada Koyama, Morio Toyoshima, Toshihiro Kubooka, Tetsuharu Fuse, Yasushi Munemasa
Publikováno v:
2017 IEEE International Conference on Space Optical Systems and Applications (ICSOS).
Broadband communication using satellites requires use of the Ka band. Services of this type are now emerging all over the world, some with capacities in excess of 100 Gbps. However, as radio bandwidth resources become exhausted, high-speed optical co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::71a9719b842f4d68bea864eee556a586
https://doi.org/10.1109/icsos.2017.8357424
https://doi.org/10.1109/icsos.2017.8357424
Publikováno v:
International Conference on Space Optics — ICSO 2016.
Recently, the sensors ability of remote sensing satellites are offering much better resolution, higher quality, etc. [1] The gathered data size by the satellite has become larger. However, generally, downlink transfer capacity from the satellite to a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2c83c4b1edd54fcd419632d7d609cdfc
https://doi.org/10.1117/12.2296176
https://doi.org/10.1117/12.2296176
Autor:
Morio Toyoshima, Hideki Takenaka, Dimitar Kolev, Maki Akioka, Yoshisada Koyama, Hiroo Kunimori, Yasushi Munemasa
Publikováno v:
International Conference on Space Optics — ICSO 2016.
In recent years, the performance of observation equipment mounted on satellites has improved to such levels that it can obtain significant amount of data from a single observation [1]. Radio waves are used as a method for transmitting large volumes o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::22d57b32ce6bd0bc0b781c405964b9a3
https://doi.org/10.1117/12.2296179
https://doi.org/10.1117/12.2296179
Autor:
Yasushi Munemasa, Tetsuharu Fuse, Kenji Suzuki, Dimitar Kolev, Yoshisada Koyama, Toshihiro Kubooka, Maki Akioka, Hideki Takenaka, Hiroo Kunimori, M. Toyoshima
Publikováno v:
International Conference on Space Optics — ICSO 2016.
National Institute of Information and Communications Technology (NICT) has a long history of the R&D of space laser communications.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::663c3ba2f006b9802eb632e280851daf
https://doi.org/10.1117/12.2296224
https://doi.org/10.1117/12.2296224
Autor:
Hideki Takenaka, Dimitar Kolev, Yoshisada Koyama, Maki Akioka, Yasushi Munemasa, Hiroo Kunimori, Morio Toyoshima
Publikováno v:
Proceedings of SPIE; 12/1/2017, Vol. 10562, p1-8, 8p
Autor:
Yasushi Munemasa, Tetsuharu Fuse, Toshihiro Kubo-oka, Hiroo Kunimori, Kolev, Dimitar R., Carrasco-Casado, Alberto, Hideki Takenaka, Yoshihiko Saito, Trinh, Phuc Viet, Kenji Suzuki, Yoshisada Koyama, Morio Toyoshima
Publikováno v:
Proceedings of SPIE; 10/12/2017, Vol. 10509, p1-7, 7p