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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 34,
  • Issue 22,
  • pp. 5278-5283
  • (2016)

An Improved Positioning Algorithm in a Long-Range Asymmetric Perimeter Security System

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Abstract

In this paper, an improved positioning algorithm is proposed for a long-range asymmetric perimeter security system. This algorithm employs zero-crossing rate to detect the disturbance starting point, and then utilizes an improved empirical mode decomposition to obtain the effective time-frequency distribution of the extracted signal. In the end, a cross-correlation is used to estimate the time delay of the effective extracted signal. The scheme is also verified and analyzed experimentally. The field test results demonstrate that the proposed scheme can achieve a detection of 96.60% of positioning errors distributed within the range of ${\rm{0\hbox{--} \pm 20\,m}}$ at the sensing length of 75 km, which significantly improves the positioning accuracy for the long-range asymmetric fence perimeter application.

© 2016 IEEE

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