Radio-over-fiber distributed antenna system for WiMAX bullet train field trial

  • Authors:

  • Bruce Chow;Ming-Li Yee;Michael Sauer;Anthony Ng'Oma;Ming-Chien Tseng;Chien-Hung Yeh

  • Affiliations:

  • Corning Incorporated, Science & Technology Division, Corning, New York;Corning Incorporated, Science & Technology Division, Corning, New York;Corning Incorporated, Science & Technology Division, Corning, New York;Corning Incorporated, Science & Technology Division, Corning, New York;Industrial Technology Research Institute, Hsinchu, Taiwan;Industrial Technology Research Institute, Hsinchu, Taiwan

  • Venue:
  • MWS'09 Proceedings of the 2009 IEEE conference on Mobile WiMAX
  • Year:
  • 2009

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Abstract

Wireless broadband access for mobile applications is an area of increasing growth. An international collaboration, led by the Taiwan Industrial Technology Research Institute (ITRI), has been working to implement a dedicated WiMAX network for a user field trial on the Taiwan High Speed Rail bullet train system. Continuous wireless coverage at train speeds up to 300km/hr is challenging due to a number of critical issues, including handover at high speeds and coverage in challenging terrain such as tunnels. A Radio-over-Fiber (RoF) Distributed Antenna System (DAS) was developed by Coming Incorporated to address the critical issue of handover and increase the coverage for each WiMAX basestation. For a DAS deployment consisting of multiple discrete antennas, proper signal strength management is required because the maximum delay spread allowed by the WiMAX protocol is easily surpassed at realistic fiber ranges up to 9km. This paper reviews some of the initial testing results of the RoF DAS experiments in SongShan tunnel in Taipei. Error-free signal transmission was achieved when the difference in received power from two consecutive antennas was greater than lOdD.