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Array imaging with beam-steered data.

M Soumekh1

  • 1Dept. of Electr. and Comput. Eng., State Univ. of New York, Buffalo, Amherst, NY.

IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society
|January 1, 1992
PubMed
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This study introduces a new system model and inversion technique for phased array scan data. The method uses time samples of echoed signals to reconstruct images, offering an alternative to range focusing for better imaging.

Area of Science:

  • Electrical Engineering
  • Signal Processing
  • Electromagnetics

Background:

  • Phased array systems are crucial for applications requiring electronic beam steering.
  • Traditional imaging methods often rely on range focusing, which can have limitations.
  • Understanding the relationship between phased array data and image reconstruction is essential.

Purpose of the Study:

  • To develop a system model and inversion method for beam-steered data from phased arrays.
  • To incorporate element radiation patterns into the system model and inversion.
  • To demonstrate the equivalence of phased array imaging to synthesized array imaging.

Main Methods:

  • A system model was developed for phased array scan data, considering element radiation patterns.

Related Experiment Videos

  • An inversion method was proposed that utilizes time samples of echoed signals, bypassing range focusing.
  • The temporal Fourier transform of phased array scan data was analyzed to understand reflectivity function distribution.

    • Main Results:

    • The temporal Fourier transform of phased array scan data yields the spatial Fourier transform of the reflectivity function.
    • Image reconstruction is achievable using time samples of echoed signals for each scan angle.
    • The imaging information from phased array data inversion is equivalent to that from synthesized array reconstruction.

    Conclusions:

    • The proposed system model and inversion method effectively process phased array scan data for imaging.
    • This approach provides an alternative to conventional range focusing techniques.
    • The study confirms the equivalence between phased array and synthesized array imaging information.