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Cooperative Estimation Algorithms Using TDOA Measurements

In: Cooperative Systems

Author

Listed:
  • Kenneth A. Fisher

    (Air Force Institute of Technology)

  • John F. Raquet

    (Air Force Institute of Technology)

  • Meir Pachter

    (Air Force Institute of Technology)

Abstract

Summary A navigation algorithm using Time Difference of Arrival (TDOA) measurements obtained from signals of opportunity (SOPs) is developed. SOP-derived TDOA measurements are signals that are transmitted for purposes other than navigation (such as communication, telecasts, etc.) and are motived as appealling alternatives to GPS. In the scenario considered herein, the received SOPs are generated by asynchronous emitters at known locations. The measured TDOA are with reference to a reference receiver also at a known location. Although it would appear that the equations governing TDOA measurements, and consequently TDOA GDOP, are quite different from their GPS counterparts, it is shown that the TDOA measurement equations can be transformed into GPS pseudorange equations. This interpretation not only provides a direct evaluation of the TDOA GDOP and affords a characterization of the optimal measurement geometry, but, in addition, lets us fall back on well known GPS algorithms.

Suggested Citation

  • Kenneth A. Fisher & John F. Raquet & Meir Pachter, 2007. "Cooperative Estimation Algorithms Using TDOA Measurements," Lecture Notes in Economics and Mathematical Systems, in: Don Grundel & Robert Murphey & Panos Pardalos & Oleg Prokopyev (ed.), Cooperative Systems, pages 57-66, Springer.
    • Handle: RePEc:spr:lnechp:978-3-540-48271-0_4
    DOI: 10.1007/978-3-540-48271-0_4
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