Toshihiko Wakahara
Waseda University
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Publication
Featured researches published by Toshihiko Wakahara.
international conference on multimedia and expo | 2001
Toshihiko Wakahara; Mitsuji Matsumoto; Takao Shimizu; Hideyuki Ohara; S. Kayama; Tetsuji Yamato; I. Sono; Y. Nakatsuji
A high-speed wireless network has been constructed that utilizes the newly approved 60 GHz frequency band. In Japan, this newly allocated millimeter wave can be used without a license. The system configuration and the experimental results are shown. The prototype system has been constructed at the Waseda University campus and the operation of this system is confirmed. Then the transmission characteristics in the experiments show very good and this system can provide the remote lecture service and seminar, etc.
International Journal of Infrared and Millimeter Waves | 2003
Edward Mutafungwa; Seppo J. Halme; Kamugisha Kazaura; Mitsuji Matsumoto; Toshihiko Wakahara
In this paper, we propose and simulate 2 OCDM × 4 WDM transmission system for a millimeter-wave (60 GHz) over fiber system to be used in broadband wireless access networks (BWANs). The general system setup is devised and the necessary building blocks identified. Results gathered (for a 155 Mbit/s per user system) under worst case parameter specifications and settings suggest indicate that system performance is severely limited by optical multiuser interference (OMUI) penalties. Several methods to reduce the OMUI limitations are described. These methods should ensure that this transmission scheme possible wavelength-reuse option for future MMW BWANs.
Archive | 2003
Takayuki Arai; Mitsushi Matsumoto; Toshihiko Wakahara; 充司 松本; 俊彦 若原; 隆之 荒井
Systems and Computers in Japan | 2003
Toshihiko Wakahara; Kunio Sono; Yuichi Nakatsuji; Takao Shimizu; Mitsuji Matsumoto
Journal of Optical Networking | 2003
Edward Mutafungwa; Seppo J. Halme; Kamugisha Kazaura; Toshihiko Wakahara; Mitsuji Matsumoto
電子情報通信学会技術研究報告. TM, テレコミュニケーションマネジメント | 2002
Nelson Baloian; Jens Hardings; Yasuyoshi Itsuki; Toshihiko Wakahara; Mitsuji Matsumoto
電子情報通信学会技術研究報告. TM, テレコミュニケーションマネジメント | 2002
Ken-ichiro Shimada; Ken Tsutsuguchi; Masahiko Kuji; Itsuki Yasuyoshi; Toshihiko Wakahara; Mitsuji Matsumoto
Proceedings of the Annual Conference of the Institute of Image Electronics Engineers of Japan Proceedings of the 30th Annual Conference of the Institute of Image Electronics Engineers of Japan 2002 | 2002
Toshihiko Wakahara; Mitsuji Matsumoto
Proceedings of the Annual Conference of the Institute of Image Electronics Engineers of Japan Proceedings of the 30th Annual Conference of the Institute of Image Electronics Engineers of Japan 2002 | 2002
Zheng yi Yu; Toshihiko Wakahara; Mitsuji Matsumoto
Proceedings of the Annual Conference of the Institute of Image Electronics Engineers of Japan Proceedings of the 30th Annual Conference of the Institute of Image Electronics Engineers of Japan 2002 | 2002
Kamugisha Kazaura; Toshihiko Wakahara; Mitsuji Matsumoto
