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Optimal array pattern synthesis for broadband arrays.

Shefeng Yan1, Yuanliang Ma, Chaohuan Hou

  • 1Department of Electronics and Telecommunications, Norwegian University of Science and Technology, 7491, Trondheim, Norway. sfyan@ieee.org

The Journal of the Acoustical Society of America
|January 15, 2008
PubMed
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This study introduces a novel broadband beamformer design method for consistent mainlobe response across frequencies. The approach enhances accuracy and allows for lower sidelobes in applications like underwater acoustics.

Area of Science:

  • Acoustics and Signal Processing
  • Array Signal Processing
  • Electromagnetics and Wave Propagation

Background:

  • Broadband beamformers with constant mainlobe response are crucial for applications like underwater acoustics, ultrasonics, and communications.
  • Existing methods often require specific array geometries, more sensors, and employ suboptimal error minimization across the entire field of view.

Purpose of the Study:

  • To propose a novel broadband array pattern synthesis approach for designing time-domain constant mainlobe response beamformers.
  • To improve mainlobe synthesis accuracy and achieve lower sidelobes compared to existing methods.

Main Methods:

  • Developed a time-domain approach imposing constraints on mainlobe spatial response variation and sidelobes.
  • Utilized convex second-order cone programming (SOCP) for optimization criteria.

Related Experiment Videos

  • Focused variation minimization solely on the mainlobe region, not sidelobes.

    • Main Results:

    • The proposed approach achieves improved mainlobe synthesis accuracy.
    • Lower sidelobes can be obtained at the same mainlobe synthesis accuracy.
    • The method is applicable to arrays with arbitrary geometry.
    • Simulation and experimental results validate the effectiveness of the approach.

    Conclusions:

    • The novel broadband beamformer design offers enhanced performance and flexibility.
    • It overcomes limitations of previous methods by focusing optimization and accommodating diverse array geometries.
    • The approach is effective for various acoustic and communication applications.