International Journal of Control, Automation, and Systems

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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Performance Improvement of Wald Test for Resolving GPS Integer Ambiguity Using a Baseline-Length Constraint

  • Lee Eun-Sung (Department of Aerospace Engineering, Kookuk University) ;
  • Chun Se-Bum (Department of Aerospace Engineering, Kookuk University) ;
  • Lee Young-Jae (Department of Aerospace Engineering, Kookuk University) ;
  • Kang Tea-Sam (Department of Aerospace Engineering, Kookuk University) ;
  • Jee Gyu-In (Department of Electronic Engineering, Kookuk University) ;
  • Abdel-Hafez Mamoun F. (American University of Sharjah)
  • Published : 2006.06.01
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Abstract

In this paper, the baseline-length information is directly modeled as a measurement for the Wald test, which speeds up the resolution convergence of the integer ambiguity of GPS carrier phase measurements. The convergent speed improvement is demonstrated using numerical simulation and real experiments. It is also shown that the integer ambiguities can be resolved using only four actual satellite measurements with very reasonable convergence speed, if the baseline-length information is used just like one additional observable satellite measurement. Finally, it is shown that the improvement of convergence speed of the Wald test is due to the increase of the probability ratio with the use of the baseline-length constraint.

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References

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