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A new filter design technique for coded excitation systems.

P C Li1, E Ebbini, M O'Donnell

  • 1Dept. of Electr. Eng. and Comput. Sci. Michigan Univ., Ann Arbor, MI.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|January 1, 1992
PubMed
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This study introduces a new filter design for coded excitation systems to improve range resolution and reduce sidelobe levels. The developed technique offers superior performance compared to classic inverse filters.

Area of Science:

  • Signal Processing
  • Filter Design
  • Coded Excitation Systems

Background:

  • Traditional methods for coded excitation systems often struggle with achieving both high range resolution and acceptable range sidelobe levels.
  • Direct complex correlation can lead to undesirable sidelobe characteristics in the output signal.

Purpose of the Study:

  • To develop an advanced filter design technique for coded excitation systems.
  • To enhance range resolution and minimize range sidelobe levels.
  • To provide a method superior to classic inverse filtering.

Main Methods:

  • A novel filter design technique is developed, incorporating criteria for both peak sidelobe levels and minimum sidelobe energy.
  • The technique involves designing filters that achieve specific sidelobe performance thresholds.

Related Experiment Videos

  • Filter length extension is explored as a method for further sidelobe reduction.

    • Main Results:

    • The proposed filter design technique effectively reduces sidelobe levels below a prespecified threshold.
    • Performance is demonstrated to be superior to that of a classic inverse filter.
    • Simulation results validate the mathematical formulation and the utility of the technique.

    Conclusions:

    • The developed filter design technique offers a significant improvement for coded excitation systems.
    • This approach provides a robust method for managing range sidelobe levels and enhancing resolution.
    • The technique is broadly applicable to other signal processing challenges, with considerations for quantization effects.