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PIERS Online
Vol. 5
No. 3
2009
pp: 235-240Experimental Demonstration of a Radio on Free Space Optics System for Ubiquitous WirelessKamugisha Kazaura, Toshiji Suzuki, Kazuhiko Wakamori, Mitsuji Matsumoto, Takeshi Higashino, Katsutoshi Tsukamoto, and Shozo Komaki doi:10.2529/PIERS080907022238 Downloads: 579 Abstract:One of the ultimate goals in next generation network design is to achieve an ubiquitous environment enabling connectivity between any wireless access system with optical fiber core network. Radio on Fiber (RoF) technology has been applied to realize a universal platform for transparently carrying various types of wireless services. By applying free-space optics (FSO) communication techniques combined with RoF, this concept can be extended to free space channels. This paper presents a new DWDM Radio on Free-Space Optics (RoFSO) system, which can be used to realize a universal platform to quickly and effectively provide ubiquitous wireless services to underserved areas avoided due to prohibitive costs associated with deploying optical fiber. To realize this RoFSO system, a next generation FSO system which provides seamless connection between free-space and optical fiber links by directly coupling the free-space propagated beam to a single mode fiber (SMF) is used. We have evaluated this new DWDM RoFSO system by conducting field experiments in simultaneous transmission of various kinds of wireless services; for example, 3GPP cellular, WLAN, terrestrial digital broadcasting TV (ISDB-T) signals; over extended durations. The preliminary results demonstrate the potential to utilize the RoFSO system for stable and reliable transmission of optical and radio frequency (RF) signals.References:1. Al-Raweshidy, H., S. Komaki, ed., Radio Over Fiber Technologies for Mobile Communications Networks, 1 ed., Artech House Publishers, 2002. 2. Kedar, D. and S. Arnon, "Urban optical wireless communication networks: the main challenges and possible solutions," IEEE Optical Communications Magazine, Vol. 42, S2-S7, May, 2004. 3. Arimoto, Y., "Multi-gigabit free-space optical communication system with bi-directional beacon tracking," IEEJ Transactions on Fundamentals and Materials, Vol. 127, No. 7, 385-390, 2007. 4. Tsukamoto, K., et al., "Development of DWDM Radio on free space optic link system for ubiquitous wireless," Asia-Pacific Microwave Photonics Conference, Apr., 2007. 5. Takahashi, K., et al., "Design and evaluation of optical antenna module suitable for radioon free-space optics link system for ubiquitous wireless," Free-Space Laser Communication Technologies XX, Vol. 6877, SPIE, Jan., 2008. 6. Refai, H. H., et al., "The transmission of multiple RF signals in free-space optics using wave-length division multiplexing," Atmospheric Propagation II, Vol. 5793, 136-143, SPIE, May, 2005. 7. Katz, G., et al., "Cellular over optical wireless networks," IEE Proc. Optoelectron, Vol. 153, 195-198, Aug., 2006. 8. 3GPP TS 25.141, 3rd Generation Partnership Project, http://www.3gpp.org/, 2002. 9. ARIB STD-B31, http://www.arib.or.jp/english/html/overview/ov/std b31.html. |
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