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Proceedings Paper

Positioning and tracking control system analysis for mobile free space optical network
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Paper Abstract

Free Space Optical (FSO) communication has evolved to be applied to the mobile network, because it can provide up to 2.5Gbps or higher data rate wireless communication. One of the key challenges with FSO systems is to maintain the Line of Sight (LOS) between transmitter and receiver. In this paper, the feasibility and performance of applying the FSO technology to the mobile network is explored, and the design plan of the attitude positioning and tracking control system of the FSO transceiver is investigated. First, the system architecture is introduced, the requirements for the control system are analyzed, the involved reference frames and frame transformation are presented. Second, the control system bandwidth is used to evaluate the system performance in controlling a positioning system consisting of a gimbal and a steering mirror, some definitions to describe the positioning accuracy and tracking capacity are given. The attitude control of a FSO transceiver is split into 2 similar channels: pitch and yaw. Using an equivalent linear control system model, the simulations are carried out, with and without the presence of uncertainties that includes GPS data errors and sensor measurement errors. Finally, based on the simulation results in the pitch channel, the quantitative evaluation on the performance of the control system is given, including positioning accuracy, tracking capability and uncertainty tolerance.

Paper Details

Date Published: 12 September 2005
PDF: 12 pages
Proc. SPIE 5892, Free-Space Laser Communications V, 58921D (12 September 2005); doi: 10.1117/12.617261
Show Author Affiliations
Yushan Li, Univ. of Oklahoma (United States)
Hazem Refai, Univ. of Oklahoma (United States)
James J. Sluss, Jr., Univ. of Oklahoma (United States)
Pramode Verma, Univ. of Oklahoma (United States)
Peter LoPresti, Univ. of Tulsa (United States)

Published in SPIE Proceedings Vol. 5892:
Free-Space Laser Communications V
David G. Voelz; Jennifer C. Ricklin, Editor(s)

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