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Related Experiment Videos

Motion compensation for adaptive horizontal line array processing.

T C Yang1

  • 1Naval Research Laboratory, Washington, DC 20375, USA. yang@wave.nrl.navy.mil

The Journal of the Acoustical Society of America
|February 1, 2003
PubMed
Summary
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Source motion degrades adaptive array processing performance. This study compensates for source motion effects in the signal beam covariance matrix, enabling longer data integration without losing signal power.

Area of Science:

  • Array signal processing
  • Acoustic array beamforming
  • Adaptive signal processing

Background:

  • Large aperture horizontal line arrays offer high resolution for signal separation via beamforming.
  • Adaptive array processing enhances array gain by nulling interference signals.
  • Source motion significantly degrades adaptive array processing by limiting the stationary time window.

Purpose of the Study:

  • To compensate for the detrimental effects of source motion on adaptive array processing.
  • To enable integration of a large number of data samples without signal power loss.
  • To maintain the effectiveness of interference suppression in the presence of moving sources.

Main Methods:

  • Employing a rotating coordinate frame to track signal bearing changes.

Related Experiment Videos

  • Utilizing waveguide invariant theory for compensating signal range variations via frequency shifting.
  • Compensating the signal beam covariance matrix to mitigate source motion impacts.

    • Main Results:

    • Successful compensation for source motion effects on the signal beam covariance matrix.
    • Demonstrated ability to integrate over a large number of data samples without signal beam power degradation.
    • Preservation of interference suppression capabilities despite source movement.

    Conclusions:

    • The proposed method effectively compensates for source motion in adaptive array processing.
    • This compensation allows for extended data integration periods, improving performance.
    • The technique maintains high array gain and interference suppression for moving sources.