Dr. Koichi Takahashi Profile

Dr. Koichi Takahashi

Chief Researcher

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Author

Publications (8)

Proceedings Article | 24 February 2009 Paper

Experimental evaluation of a radio-on-FSO communication system for multiple RF signal transmission

Kamugisha Kazaura, Pham Dat, Abdelmoula Bekkali, Alam Shah, Toshiji Suzuki, Kazuhiko Wakamori, Mitsuji Matsumoto, Takuya Nakamura, Koichi Takahashi, Takeshi Higashino, Yuji Aburakawa, Katsutoshi Tsukamoto, Shozo Komaki

Proceedings Volume 7199, 719907 (2009) https://doi.org/10.1117/12.808791

KEYWORDS: Free space optics, Antennas, Dense wavelength division multiplexing, Radio over Fiber, Modulation, Atmospheric optics, Radio optics, Televisions, Optical amplifiers, Single mode fibers

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Proceedings Article | 26 January 2009 Paper

RoFSO channel modeling considering time-correlation of scintillation and its application to performance evaluation of WLAN signal transmission

Kyung-Hwan Kim, Hideaki Onodera, Takeshi Higashino, Takuya Nakamura, Yuji Aburakawa, Katsutoshi Tsukamoto, Shozo Komaki, Kazuhiko Wakamori, Toshiji Suzuki, Kamugisha Kazaura, Mohamad Shah Alam, Koichi Takahashi, Kazunori Ohmae, Takurou Satou, Mitsuji Matsumoto

Proceedings Volume 7234, 72340L (2009) https://doi.org/10.1117/12.808849

KEYWORDS: Scintillation, Free space optics, Statistical analysis, Channel projecting optics, Atmospheric optics, Atmospheric modeling, Performance modeling, Radio optics, Data modeling, Telecommunications

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Proceedings Article | 13 February 2008 Paper

Characterization of RF signal transmission using FSO links considering atmospheric effects

Alam Mohammad Shah, Pham Tien Dat, Kamugisha Kazaura, Kazuhiko Wakamori, Toshiji Suzuki, Kazunori Omae, Mitsuji Matsumoto, Yuji Aburakawa, Koichi Takahashi, Takuya Nakamura, Takeshi Higashino, Katsutoshi Tsukamoto, Shozo Komaki

Proceedings Volume 6877, 68770D (2008) https://doi.org/10.1117/12.762830

KEYWORDS: Free space optics, Antennas, Dense wavelength division multiplexing, Telecommunications, Atmospheric turbulence, Signal attenuation, Atmospheric modeling, Optical fibers, Visibility, Atmospheric optics

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Proceedings Article | 13 February 2008 Paper

Design and evaluation of optical antenna module suitable for radio-on free-space optics link system for ubiquitous wireless

Koichi Takahashi, Takeshi Higashino, Takuya Nakamura, Yuji Aburakawa, Katsutoshi Tsukamoto, Shozo Komaki, Kazuhiko Wakamori, Toshiji Suzuki, Kamugisha Kazaura, Alam Mohammad Shah, Kazunori Omae, Mitsuji Matsumoto, Yuichi Miyamoto

Proceedings Volume 6877, 68770H (2008) https://doi.org/10.1117/12.765028

KEYWORDS: Free space optics, Optical antennas, Telecommunications, Radio over Fiber, Optical tracking, Mirrors, Single mode fibers, Sensors, Atmospheric propagation, Atmospheric optics

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SPIE Journal Paper | 1 January 2008

Compact optical antennas using free-form surface optics for ultrahigh-speed laser communication systems

Koichi Takahashi, Yoshinori Arimoto

OE, Vol. 47, Issue 01, 016002, (January 2008) https://doi.org/10.1117/12.10.1117/1.2831669

KEYWORDS: Optical antennas, Mirrors, Telecommunications, Optical communications, Optical design, Laser communications, Single mode fibers, Laser systems engineering, Prototyping, Antennas

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Proceedings Article | 2 October 2006 Paper

Experimental demonstration of next-generation FSO communication system

Kamugisha Kazaura, Kazunori Omae, Toshiji Suzuki, Mitsuji Matsumoto, Edward Mutafungwa, Koichi Asatani, Tadaaki Murakami, Koichi Takahashi, Hideki Matsumoto, Kazuhiko Wakamori, Yoshinori Arimoto

Proceedings Volume 6390, 63900G (2006) https://doi.org/10.1117/12.685884

KEYWORDS: Free space optics, Telecommunications, Antennas, Mirrors, Sensors, Single mode fibers, Data communications, Atmospheric optics, Optical antennas, Scintillation

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Proceedings Article | 1 March 2006 Paper

Mitigation of atmospheric effects on terrestrial FSO communication systems by using high-speed beam tracking antenna

Kamugisha Kazaura, Kazunori Omae, Toshiji Suzuki, Mitsuji Matsumoto, Takuro Sato, Koichi Asatani, Mitsutoshi Hatori, Tadaaki Murakami, Koichi Takahashi, Hideki Matsumoto, Kazuhiko Wakamori, Yoshinori Arimoto

Proceedings Volume 6105, 61050N (2006) https://doi.org/10.1117/12.655780

KEYWORDS: Free space optics, Scintillation, Antennas, Atmospheric optics, Atmospheric propagation, Telecommunications, Single mode fibers, Atmospheric turbulence, Signal attenuation, Beam propagation method

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Proceedings Article | 10 February 2006 Paper

Development of optical antennas utilizing free form surface optics for the high speed laser communication systems

Koichi Takahashi, Yoshinori Arimoto

Proceedings Volume 6105, 610507 (2006) https://doi.org/10.1117/12.657778

KEYWORDS: Mirrors, Optical antennas, Telecommunications, Optical communications, Optical tracking, Single mode fibers, Charge-coupled devices, Atmospheric turbulence, Laser communications, Optical design

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Showing 5 of 8 publications

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