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Volume 20 Issue 2
 
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Article Navigation >  Journal of Unmanned Undersea Systems  > 2012  >  20(2): 095-99
TANG Bo, YUAN Bing-cheng, XU Yu. Error Analysis of Green′s Function Sampled in K-space for Forward Reconstruction[J]. Journal of Unmanned Undersea Systems, 2012, 20(2): 095-99. doi: 10.11993/j.issn.1673-1948.2012.02.004
Citation: TANG Bo, YUAN Bing-cheng, XU Yu. Error Analysis of Green′s Function Sampled in K-space for Forward Reconstruction[J]. Journal of Unmanned Undersea Systems, 2012, 20(2): 095-99. doi: 10.11993/j.issn.1673-1948.2012.02.004
shu

Error Analysis of Green′s Function Sampled in K-space for Forward Reconstruction

doi: 10.11993/j.issn.1673-1948.2012.02.004

  • Department of weaponry Engineering, Naval University of Engineering, Wuhan 430033, China

  • Received Date: 2011-08-27
  • Rev Recd Date: 2011-09-29
  • Publish Date: 2012-04-20
    Abstract
  • During the near-field acoustic holographic reconstruction, tremendous errors will appear when using Green′s function sampled in K-space for long distance forward reconstruction, and conventional window function cannot restrain the error efficiently. In this paper, the error is analyzed to be generated by spectrum leakage and edge Gibbs phenomenon derived from amplitude discontinuity of Green′s function sampled in K-space, hence a corresponding method for changing the cut-off wave number of window function is represented to smooth the amplitude discontinuity and further to restrain the error. Simulation result shows that the improved window function can obviously reduce the error in the holographic aperture, and the present method is efficient in restraining the error generated by spectrum leakage and Gibbs phenomenon derived from amplitude discontinuity of Green′s function sampled in K-space.

     

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